Medicare Enrolled

Dr. Louis Avvento, MD

Hematology & Oncology · Southampton, NY
Practice pattern: Mixed Practice — Diverse clinical practice across multiple procedure types
Low-engagement
640 COUNTY ROAD 39, Southampton, NY 11968
6317513000
In practice since 2006 (20 years)
NPI: 1417999533 verify on NPPES ↗
Very High
DATA COVERAGE
Data in 4 of 4 federal sources
Measures public federal data availability — not provider quality
Informational, not a quality rating. This page presents federal public records about Dr. Avvento from CMS (NPPES, Open Payments, Medicare Provider Utilization, PECOS). It is not medical advice, an endorsement, or a judgment of clinical quality. Always consult the provider directly and a licensed clinician for medical decisions. Read methodology →
Are you Dr. Avvento? Request a correction or review of any data shown here. Provider portal →

What this data tells you about Dr. Avvento

Dr. Louis Avvento is a hematology & oncology specialist in Southampton, NY, with 20 years of NPI registration. Based on federal Medicare data, Dr. Avvento performed 206,976 Medicare services across 18,190 unique beneficiaries.

Between the years covered by Open Payments, Dr. Avvento received a total of $1,422 from 22 pharmaceutical and/or device companies across 35 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in hematology & oncology. Most payments are for meals and travel — low-value interactions common across virtually all practicing physicians. Patients may wish to discuss these relationships with their provider.

The Data Coverage level for Dr. Avvento is Very High — reflecting how much public federal data is available about this provider. Patients are encouraged to use this data as one of several factors when choosing a healthcare provider.

✓ 20 years in practice ▲ Top 2% volume in NY $1,422 industry payments

Medicare Practice Summary

Medicare Utilization ↗
206,976
Medicare services
Top 2% in NY for hematology & oncology
18,190
Unique beneficiaries
$13
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~10,349 Medicare services per year of practice

Top procedures by volume

Ranked by number of services performed for Medicare patients. Avg. submitted charge is what the provider billed; avg. Medicare payment is what CMS paid.

Procedure Volume Avg. paid Avg. submitted
Iron infusion (Injectafer)
An intravenous injection of ferric carboxymaltose, an iron replacement medication.
68,250 $1 $5
Darbepoetin injection (Aranesp) for anemia
An injection of darbepoetin alfa used for non-end-stage renal disease purposes.
26,000 $2 $20
Daratumumab injection (Darzalex)
An injection containing daratumumab and hyaluronidase-fihj administered under the skin.
16,200 $38 $135
Iron sucrose injection (Venofer)
An injection of iron sucrose used to replenish iron levels in the body.
13,000 $0 $1
Denosumab injection (Prolia/Xgeva) 11,520 $19 $90
Pembrolizumab injection (Keytruda) 9,800 $43 $100
Flow cytometry, additional marker
An additional marker is tested during a flow cytometry procedure to analyze DNA or cells. This step adds specific data points to the initial analysis.
7,913 $23 $108
Blood draw (venipuncture)
Insertion of a needle into a vein to collect a blood sample.
4,171 $8 $20
Complete blood count (CBC) with differential
An automated laboratory test that measures the levels of red blood cells, white blood cells, and platelets in the blood, including a breakdown of the different types of white blood cells.
4,127 $8 $150
Bortezomib injection, 0.1 mg
Administration of a 0.1 mg dose of bortezomib medication via injection.
3,344 $4 $150
Comprehensive metabolic blood panel
A blood test that measures a group of chemicals, including glucose, electrolytes, and kidney and liver function markers.
3,202 $10 $60
Immune globulin infusion (Octagam)
This procedure involves the administration of immune globulin medication directly into a vein. It is provided in a non-lyophilized liquid form.
2,820 $33 $110
Magnesium level test
A blood test to measure the amount of magnesium in your body. This helps check for magnesium deficiency or excess.
2,323 $7 $75
Lactate dehydrogenase (LDH) level test
A blood test that measures the amount of lactate dehydrogenase, an enzyme found in many body tissues. It helps assess tissue damage or disease.
2,274 $6 $30
Dexamethasone injection (steroid)
An injection of dexamethasone sodium phosphate, a corticosteroid medication, administered in a dose of 1 milligram.
2,273 $0 $10
Uric acid level test
A blood test that measures the level of uric acid in your body. Uric acid is a waste product formed when the body breaks down purines.
2,157 $4 $50
Office visit, established patient (30-39 min)
A follow-up office visit for an existing patient lasting between 30 and 39 minutes. The visit involves medical evaluation and management of the patient's condition.
1,933 $118 $457
Ferritin level test (iron stores)
A blood test that measures the level of ferritin, a protein that stores iron in the body.
1,913 $13 $150
Iron level test 1,853 $6 $70
Iron binding capacity test
A blood test that measures the amount of iron in the blood and the blood's ability to bind and transport iron.
1,813 $9 $125
Chronic care management, first 20 min/month
This service covers the first 20 minutes of clinical staff time directed by a healthcare professional each calendar month to manage chronic conditions.
1,625 $55 $150
Phosphate level test
A blood test that measures the amount of phosphate in your body. Phosphate is a mineral that helps keep bones and teeth strong.
1,618 $5 $50
Immunoglobulin level test
A blood test that measures the level of gammaglobulins, which are immune system proteins.
1,563 $9 $45
Office visit, established patient, complex (40-54 min)
An office or outpatient visit for an existing patient lasting between 40 and 54 minutes. This level of service is determined by the total time spent on the date of the encounter.
1,333 $165 $940
Vitamin B-12 level test
A blood test that measures the amount of vitamin B-12 in your body.
1,226 $15 $75
Manual red blood cell count
A laboratory test that manually counts the number of red blood cells in a blood sample.
1,090 $4 $15
Folic acid level test
A blood test that measures the amount of folic acid in the serum.
1,043 $14 $70
Carcinoembryonic antigen (CEA) level test
A blood test that measures the level of carcinoembryonic antigen (CEA) protein. This test is used to monitor certain types of cancer.
875 $19 $60
Drug injection, under skin or into muscle
A procedure involving the administration of a medication or substance via injection into the subcutaneous tissue or muscle.
827 $13 $190
Immunoglobulin light chain measurement
A blood test that measures the levels of immunoglobulin light chains, which are proteins produced by plasma cells.
704 $17 $70
PSA test (prostate cancer screening) 451 $18 $50
Thyroid stimulating hormone (TSH) test
A blood test that measures the level of thyroid stimulating hormone to evaluate thyroid function.
433 $16 $150
Immunologic analysis for detection of tumor antigen, quantitative; ca 15-3 388 $20 $70
Serum immunofixation test
A laboratory test that analyzes a blood serum sample to identify specific abnormal proteins. The procedure uses an immunologic technique to detect and characterize these proteins.
356 $22 $110
Flow cytometry DNA or cell analysis, first marker
A laboratory test that uses a laser to analyze cells or DNA by detecting a specific marker on the cell surface or within the cell.
343 $73 $300
Serum protein measurement
A blood test that measures the total amount of protein in the serum. It helps evaluate overall health and nutritional status.
335 $10 $60
Intravenous chemotherapy infusion, 1 hour or less
Administration of chemotherapy medication directly into a vein. The procedure takes one hour or less to complete.
322 $129 $550
Intravenous injection of additional new drug or substance
Administration of an additional new medication or substance directly into a vein.
319 $15 $95
Vitamin D level test
A blood test to measure the amount of Vitamin D-3 in your body.
309 $29 $150
Vitamin B-12 injection
An injection of vitamin B-12 (cyanocobalamin) with a dose of up to 1000 mcg.
293 $1 $10
Principal care management for high-risk disease, first 30 minutes
This service covers the initial 30 minutes of clinical staff time per calendar month to manage a single high-risk disease. It is directed by a healthcare professional.
263 $56 $226
Additional sequential IV infusion, 1 hour or less
This code represents an additional intravenous infusion administered sequentially to a primary infusion. It covers the administration time of one hour or less.
254 $28 $120
Non-hormonal chemotherapy injection
This procedure involves administering non-hormonal anti-neoplastic chemotherapy medication via injection into the skin or muscle tissue.
242 $72 $220
Beta-2 microglobulin level test
A blood test that measures the level of beta-2 microglobulin, a protein produced by cells in the body.
216 $16 $50
Intravenous infusion, 1 hour or less
Administration of medication or fluid directly into a vein for therapeutic, preventive, or diagnostic purposes. The procedure lasts one hour or less.
193 $62 $500
Free thyroxine (T4) test
A blood test that measures the level of free thyroxine, a thyroid hormone, in the bloodstream.
163 $9 $30
Total cortisol level test
A blood test that measures the total amount of cortisol hormone in your body. Cortisol is a hormone produced by the adrenal glands.
160 $16 $75
Intravenous drug injection
A procedure involving the administration of a medication or substance directly into a vein.
155 $36 $190
Diphenhydramine injection, up to 50 mg
An injection of diphenhydramine hydrochloride, an antihistamine medication, administered in a dose of up to 50 milligrams.
152 $1 $10
Thyroxine (T4) level test
A blood test that measures the total amount of thyroxine, a thyroid hormone, in your body.
140 $7 $35
Erythrocyte sedimentation rate (ESR) test
A blood test that measures how quickly red blood cells settle in a test tube to detect inflammation in the body. This specific method is performed manually rather than using an automated machine.
137 $4 $20
Office visit, established patient (20-29 min)
An office visit for an existing patient lasting between 20 and 29 minutes. The visit involves medical evaluation and management of the patient's condition.
124 $84 $300
Additional hour of intravenous hydration
This code represents each additional hour of intravenous fluid administration beyond the initial hour. It is used to bill for extended hydration therapy.
118 $12 $80
Hospital follow-up visit, high complexity
Subsequent hospital inpatient or observation care for an existing patient involving high-level medical decision making, with at least 50 minutes total time on the date of the encounter.
112 $111 $380
Total testosterone level test
A blood test that measures the total amount of testosterone in your body. This hormone is important for various bodily functions in both men and women.
110 $25 $300
Haptoglobin level test
A blood test that measures the amount of haptoglobin, a protein in the serum. It helps evaluate red blood cell breakdown.
105 $12 $75
Prothrombin time test (blood clotting)
A laboratory test that measures how long it takes for blood to clot. This procedure evaluates the body's coagulation process.
105 $4 $30
Hemoglobin A1c test (diabetes monitoring)
A blood test that measures your average blood sugar levels over the past two to three months.
102 $10 $50
Urinalysis, manual
A manual laboratory examination of a urine sample to check for various substances and cells.
101 $3 $50
Intravenous hydration infusion, 31-60 minutes
Administration of fluids into a vein to maintain hydration. This procedure involves an infusion lasting between 31 and 60 minutes.
94 $31 $200
Additional hour of intravenous infusion
This code represents each additional hour of intravenous infusion beyond the initial hour for therapy, prevention, or diagnosis.
90 $19 $75
Immunologic analysis for detection of tumor antigen, quantitative; ca 125 83 $20 $50
Venipuncture for blood collection
A procedure to draw blood from a vein for medical testing or analysis.
79 $91 $400
Acute hepatitis panel
A blood test that screens for markers of acute viral hepatitis infection.
69 $47 $175
Intravenous infusion of new drug or substance, 1 hour or less
This procedure involves administering a new medication or substance directly into a vein through an existing access site. The infusion is completed within one hour or less.
64 $64 $420
Additional hour of intravenous chemotherapy
This code represents the administration of chemotherapy medication into a vein for each additional hour beyond the initial period.
63 $27 $125
Flu vaccine administration
This procedure involves the administration of the influenza virus vaccine. It covers the process of delivering the vaccine to the patient.
62 $36 $40
Normal saline infusion, 250 cc
Administration of 250 cubic centimeters of normal saline solution into a vein. This procedure involves the intravenous delivery of a sterile saltwater fluid.
62 $0 $20
New patient office visit, complex (60-74 min) 58 $188 $780
CA 19-9 tumor antigen test
A blood test that measures the level of CA 19-9, a substance that can be found in the blood of some people with cancer. This quantitative analysis detects and measures the specific tumor antigen.
55 $20 $50
Office visit for established patient
An office visit for an existing patient that may not require the healthcare professional to be present.
55 $22 $100
Normal saline infusion, 500 ml
Administration of sterile normal saline solution through an intravenous line. This procedure involves the infusion of a 500 ml unit of the solution.
55 $1 $10
Normal saline infusion, 1000 cc
Administration of 1000 cc of normal saline solution into a vein. This procedure involves the intravenous delivery of a sterile saltwater solution.
48 $2 $10
Basic blood chemical test (calcium, ionized)
A blood test that measures basic chemical levels, specifically including calcium and ionized calcium.
47 $13 $75
Coagulation function measurement, d-dimer; quantitative 44 $10 $75
New patient office visit (45-59 min)
An initial office visit for a new patient lasting between 45 and 59 minutes. This code covers the total time spent by the physician or qualified healthcare professional on the date of the encounter.
43 $155 $595
Chronic care management, additional 20 min/month
This service covers an extra 20 minutes of clinical staff time directed by a healthcare professional for managing two or more chronic conditions each calendar month.
42 $41 $175
Flu vaccine, high-dose
High-dose seasonal influenza vaccine for adults aged 65 and older. Contains four times the antigen of standard-dose flu vaccines (60 mcg per strain), split-virus formulation, preservative-free, single-dose syringe.
40 $72 $175
Lipid panel (cholesterol and triglycerides)
A blood test that measures cholesterol and triglyceride levels.
39 $13 $300
Red blood cell concentration measurement
A laboratory test that measures the concentration of red blood cells in the blood.
39 $2 $50
Injection, fosnetupitant 235 mg and palonosetron 0.25 mg 38 $335 $2,100
IgE level test
A blood test that measures the level of immunoglobulin E (IgE) proteins in the immune system.
36 $16 $50
Subcutaneous or intramuscular chemotherapy injection
This procedure involves administering anti-cancer hormonal medication through an injection into the tissue under the skin or into a muscle.
35 $33 $120
Direct bilirubin level test
A blood test that measures the amount of direct bilirubin in your body. Direct bilirubin is the form of the waste product processed by the liver.
23 $5 $25
High-sensitivity C-reactive protein test
A blood test that measures high-sensitivity C-reactive protein to detect infection or inflammation.
23 $12 $50
Parathyroid hormone level test
A blood test that measures the amount of parathyroid hormone in your body. This hormone helps regulate calcium levels in the blood and bones.
22 $40 $150
Rheumatoid factor level 22 $6 $30
Alpha-fetoprotein (AFP) level test
A blood test that measures the amount of alpha-fetoprotein in the serum. This test is used to monitor certain health conditions.
21 $16 $40
Blood glucose level test
A test that measures the amount of sugar in your blood.
21 $4 $50
Quadrivalent influenza vaccine, cell-culture derived
A flu shot containing four strains of influenza virus, produced using cell culture technology rather than eggs. This formulation is free from preservatives and antibiotics.
21 $33 $90
Irrigation of implanted venous access device
This procedure involves flushing an implanted venous access device to clear blockages or maintain patency. It ensures the device remains functional for delivering medications or fluids.
21 $25 $260
Lyme disease antibody test
A blood test that checks for antibodies to the bacteria that causes Lyme disease.
18 $17 $250
Bone marrow biopsy and aspiration
A procedure to remove a small sample of bone marrow and liquid for laboratory testing. The sample is analyzed to help diagnose various medical conditions.
17 $170 $875
Blood smear for iron
A laboratory test that examines a drop of blood under a microscope to evaluate iron levels and red blood cell characteristics.
17 $7 $20
Cardiac enzyme level (CK-MB) test
A blood test that measures the total level of creatine kinase, specifically the cardiac enzyme fraction, to help evaluate heart muscle damage.
16 $6 $25
Coagulation assessment blood test
A blood test that measures how long it takes for blood to clot. The sample can be plasma or whole blood.
15 $6 $35
Drug screening test
A laboratory test that uses a chemistry analyzer to detect the presence of drugs in a sample.
14 $61 $250
Total bilirubin level test
A blood test that measures the total amount of bilirubin, a waste product from the breakdown of red blood cells, in your body.
13 $5 $15
Initial hospital admission, high complexity
Initial hospital inpatient or observation care for a new patient involving high-level medical decision making, with at least 75 minutes total time on the date of the encounter.
13 $162 $410
Stool test for blood to screen for colon tumors
A test that analyzes a stool sample to detect hidden blood, which is used to screen for colon tumors.
12 $4 $10
HIV-1 antigen and HIV-1/2 antibody test
A laboratory test using immunoassay techniques to detect HIV-1 antigens and antibodies for both HIV-1 and HIV-2.
12 $24 $96
Flow cytometry, 16 or more markers
A laboratory test that uses lasers to analyze cells or DNA using 16 or more different markers. This technique helps identify and characterize specific cell types based on their physical and chemical properties.
12 $52 $300
Transitional care management, high complexity
Coordination of care for a patient transitioning from a short-term hospital stay or other facility to home or another care setting. This service addresses a high-complexity medical problem.
12 $262 $580
How to read this data: This reflects Medicare patients only (typically 65+). Payment amounts are what Medicare paid the provider, not your out-of-pocket cost. A higher procedure volume generally indicates more experience with that procedure.
34.9% high complexity
40.7% medium
24.4% routine

Industry Payment Transparency

Open Payments through 2024 ↗
$1,422
Total received (2018-2024)
Avg $203/year across 7 years
Bottom 47% in NY for hematology & oncology
22
Companies
35
Individual payments
All payments are legal and publicly reported · Not evidence of wrongdoing · How to interpret →

Payment profile

Industry payments classified by relationship type. Not all payments are equal — research and consulting reflect different relationships than speaking programs or meals.

Meals & Travel
Food, beverages, travel, and lodging — typically low-value
$1,287 (90.5%)
Speaking / Promotional
Speaker programs, honoraria, and industry-sponsored educational events
$135 (9.5%)

Payment trend by year

Annual totals from pharmaceutical and medical device companies.

2024
$144
2023
$445
2022
$299
2021
$93
2020
$144
2019
$19
2018
$277

Payments by company (2024)

Consulting
Speaking
Meals & Travel
Research
AstraZeneca Pharmaceuticals LP
$124
CSL Behring
$20
Top 3 companies account for 100.0% of 2024 payments
All-time payments by company (2018-2024) ›
Sirtex Medical Inc
$157
GENZYME CORPORATION
$138
Seattle Genetics, Inc.
$136
Kite Pharma, Inc.
$133
Mirati Therapeutics, Inc.
$125
Genmab U.S., Inc.
$125
AstraZeneca Pharmaceuticals LP
$124
Janssen Biotech, Inc.
$92
SOBI, INC
$83
Merck Sharp & Dohme Corporation
$53
Novartis Pharmaceuticals Corporation
$41
Janssen Pharmaceuticals, Inc
$38
CTI BioPharma Corp.
$25
Dendreon Pharmaceuticals LLC
$24
CSL Behring
$20
Merck Sharp & Dohme LLC
$20
Kyowa Kirin, Inc.
$19
Spectrum Pharmaceuticals Inc.
$16
Secura Bio, Inc.
$16
Bayer HealthCare Pharmaceuticals Inc.
$14
Gilead Sciences, Inc.
$12
Karyopharm Therapeutics Inc.
$11
Top 3 companies account for 30.3% of all-time payments
Associated products mentioned in payments ›
ADCETRIS · DARZALEX · Doptelet · ELITEK · Epkinly · FARESTON · Farydak · JADENU · KEYTRUDA · KISQALI · KRAZATI · Kcentra · PROVENGE · SIR-Spheres Microspheres · Stivarga · TAGRISSO · Vonjo · XARELTO · XPOVIO · Zevalin
Should you be concerned? Payments from pharmaceutical and device companies are legal and common — 57% of U.S. physicians receive at least one. They often reflect legitimate consulting, research, or education. What matters is whether a recommended drug or device appears in your doctor's payment records. If so, consider asking your doctor about it. How to interpret this data →

Most payments (90%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians.

Looking for a hematology & oncology specialist in Southampton?
Compare hematology & oncology specialists in the Southampton area by procedure volume, costs, and industry payment transparency.
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Geographic Context

Hematology & oncology specialists within 10 mi
5
Per 100K population
0.3
County median income
$128,329
Nearest hospital
PECONIC BAY MEDICAL CENTER
11.6 mi

Data Sources

Provider Registry NPPES Weekly updates
Medicare Enrollment PECOS Monthly updates
Practice Data Medicare Util. Annual (CY lag)
Industry Payments Open Payments CY 2024
Disciplinary History — Not public N/A

This provider has data in 4 of 4 available federal datasets, with a Data Coverage level of Very High. This reflects how much public data is available about a provider. How we calculate this →

Summary

Dr. Avvento is a mixed practice specialist, with above-average Medicare volume (top 2% in NY), with low-engagement industry engagement, with 20 years of NPI registration.

This summary is auto-generated from federal data, describing data availability and patterns. Read our methodology →

Frequently Asked Questions

Is Dr. Avvento experienced with iron infusion (injectafer)?
Based on Medicare claims data, Dr. Avvento performed 68,250 iron infusion (injectafer) services. Research suggests that higher procedure volume is often associated with better outcomes, particularly for complex procedures. Note that Medicare data only captures patients aged 65 and older, so the total practice volume across all patients is likely higher.
Does Dr. Avvento receive payments from pharmaceutical companies?
Yes. Dr. Avvento received a total of $1,422 from 22 companies across 35 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common among physicians — 57% of all U.S. physicians receive at least one industry payment. Patients may wish to ask their doctor about these relationships, especially if a recommended drug or device appears in the payment records.
How do Dr. Avvento's costs compare to other hematology & oncology specialists in Southampton?
Dr. Avvento's average Medicare payment per service is $13. Note that these figures represent what Medicare pays, not your out-of-pocket cost, which depends on your specific insurance plan and deductible. Procedure-level data above shows both what was submitted and what Medicare paid for each service type.
What does Data Coverage mean?
Data Coverage (currently Very High for Dr. Avvento) measures how much public federal data is available about a provider. It is not a quality rating. A "Very High" or "High" level means the provider has data across multiple federal sources (NPPES, PECOS, Medicare Utilization, Open Payments), indicating a long track record of practice, Medicare participation, and industry disclosure. A "Low" or "Moderate" level may simply mean the provider is newer, does not see Medicare patients, or has not received any industry payments — none of which are inherently negative. Read our full methodology →
Is this data up to date?
Each data source has its own update cycle. Provider registry data (NPPES) is updated weekly. Medicare enrollment (PECOS) is updated monthly. Medicare practice data has a ~2 year lag — the most recent available is typically 2 years prior. Industry payment data (Open Payments) is published annually, usually in June, covering the prior calendar year. We display the data date prominently on each section so you always know how current it is. See our data freshness policy →
About this page

All data on this page is sourced verbatim from public federal records published by the U.S. Centers for Medicare & Medicaid Services (CMS): NPPES ↗, Open Payments ↗, Medicare Provider Utilization ↗, and PECOS. Publication is mandated by the Physician Payments Sunshine Act (§6002 ACA, 42 U.S.C. §1320a-7h) and the Freedom of Information Act.

This page is not medical advice, an endorsement, a recommendation, or a quality rating. Data Coverage reflects data completeness — how much federal information exists for this provider — not clinical performance, patient outcomes, or quality of care. Always verify information directly with the provider and consult a licensed clinician before making medical decisions.

Provider corrections: Provider portal · Privacy questions: Privacy Policy · Terms: Terms of Use · Methodology: Methodology

Data Disclaimer — Data sourced from the Centers for Medicare & Medicaid Services (CMS): National Plan and Provider Enumeration System (NPPES), Open Payments program, Medicare Provider Utilization and Payment Data, and Provider Enrollment & Certification data (PECOS). Published under the Freedom of Information Act (FOIA). This website is not affiliated with, endorsed by, or authorized by CMS, HHS, or the U.S. Government. Data may contain errors as reported to CMS by providers and reporting entities. Payments from industry are legal and do not indicate wrongdoing. Medicare data reflects only patients aged 65+ or those with qualifying disabilities. For corrections, contact CMS directly. This information does not constitute medical advice and should not be used as the sole basis for choosing a healthcare provider. Procedure descriptions use plain language and do not reference CPT® codes, which are copyrighted by the American Medical Association. Full methodology → · Report a data error → · Privacy policy →