Medicare Enrolled
Dr. William Li Pera, MD
Hematology & Oncology · Port Jefferson Station, NY
Practice pattern: Mixed Practice
— Diverse clinical practice across multiple procedure types
Consulting-driven
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. Li Pera 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 →
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What this data tells you about Dr. Li Pera
Dr. William Li Pera is a hematology & oncology specialist in Port Jefferson Station, NY, with 21 years of NPI registration. Based on federal Medicare data, Dr. Li Pera performed 115,088 Medicare services across 12,036 unique beneficiaries.
Between the years covered by Open Payments, Dr. Li Pera received a total of $8,854 from 13 pharmaceutical and/or device companies across 29 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in hematology & oncology. The majority of payments are for consulting, which typically reflects recognized clinical expertise sought by manufacturers. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Li Pera 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.
✓ 21 years in practice
▲ Top 5% volume in NY
$8,854 industry payments
Medicare Practice Summary
Medicare Utilization ↗115,088
Medicare services
Top 5% in NY for hematology & oncology
12,036
Unique beneficiaries
$7
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~5,480 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. |
56,251 | $1 | $5 |
| Darbepoetin injection (Aranesp) for anemia An injection of darbepoetin alfa used for non-end-stage renal disease purposes. |
20,200 | $2 | $20 |
| Iron sucrose injection (Venofer) An injection of iron sucrose used to replenish iron levels in the body. |
6,600 | $0 | $1 |
| 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. |
5,180 | $23 | $108 |
| Denosumab injection (Prolia/Xgeva) | 2,340 | $18 | $89 |
| 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. |
2,319 | $8 | $150 |
| Blood draw (venipuncture) Insertion of a needle into a vein to collect a blood sample. |
2,315 | $8 | $20 |
| Comprehensive metabolic blood panel A blood test that measures a group of chemicals, including glucose, electrolytes, and kidney and liver function markers. |
1,762 | $10 | $60 |
| 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. |
1,660 | $111 | $459 |
| Dexamethasone injection (steroid) An injection of dexamethasone sodium phosphate, a corticosteroid medication, administered in a dose of 1 milligram. |
1,385 | $0 | $10 |
| 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. |
1,107 | $5 | $50 |
| Magnesium level test A blood test to measure the amount of magnesium in your body. This helps check for magnesium deficiency or excess. |
1,104 | $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. |
1,095 | $6 | $30 |
| 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. |
1,091 | $55 | $150 |
| 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. |
1,056 | $4 | $50 |
| Immunoglobulin level test A blood test that measures the level of gammaglobulins, which are immune system proteins. |
954 | $9 | $45 |
| Ferritin level test (iron stores) A blood test that measures the level of ferritin, a protein that stores iron in the body. |
843 | $13 | $150 |
| Iron level test | 801 | $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. |
789 | $9 | $125 |
| 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. |
480 | $13 | $190 |
| Immunoglobulin light chain measurement A blood test that measures the levels of immunoglobulin light chains, which are proteins produced by plasma cells. |
444 | $17 | $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. |
298 | $22 | $110 |
| Vitamin B-12 level test A blood test that measures the amount of vitamin B-12 in your body. |
282 | $15 | $75 |
| Serum protein measurement A blood test that measures the total amount of protein in the serum. It helps evaluate overall health and nutritional status. |
275 | $10 | $60 |
| 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. |
266 | $19 | $60 |
| Folic acid level test A blood test that measures the amount of folic acid in the serum. |
242 | $14 | $70 |
| 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. |
227 | $72 | $300 |
| PSA test (prostate cancer screening) | 207 | $18 | $50 |
| 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. |
191 | $163 | $940 |
| Manual red blood cell count A laboratory test that manually counts the number of red blood cells in a blood sample. |
190 | $4 | $15 |
| 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. |
160 | $27 | $120 |
| 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. |
149 | $60 | $500 |
| Intravenous injection of additional new drug or substance Administration of an additional new medication or substance directly into a vein. |
144 | $15 | $95 |
| 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. |
141 | $12 | $80 |
| Vitamin B-12 injection An injection of vitamin B-12 (cyanocobalamin) with a dose of up to 1000 mcg. |
139 | $1 | $10 |
| Intravenous chemotherapy infusion, 1 hour or less Administration of chemotherapy medication directly into a vein. The procedure takes one hour or less to complete. |
133 | $126 | $550 |
| Vitamin D level test A blood test to measure the amount of Vitamin D-3 in your body. |
130 | $29 | $150 |
| Thyroid stimulating hormone (TSH) test A blood test that measures the level of thyroid stimulating hormone to evaluate thyroid function. |
128 | $16 | $150 |
| Anti-nausea injection (ondansetron/Zofran) | 118 | $0 | $10 |
| Intravenous drug injection A procedure involving the administration of a medication or substance directly into a vein. |
105 | $36 | $190 |
| Immunologic analysis for detection of tumor antigen, quantitative; ca 15-3 | 103 | $20 | $70 |
| Additional hour of intravenous infusion This code represents each additional hour of intravenous infusion beyond the initial hour for therapy, prevention, or diagnosis. |
103 | $18 | $75 |
| 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. |
96 | $25 | $300 |
| 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. |
92 | $4 | $30 |
| Diphenhydramine injection, up to 50 mg An injection of diphenhydramine hydrochloride, an antihistamine medication, administered in a dose of up to 50 milligrams. |
81 | $1 | $10 |
| 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. |
71 | $32 | $200 |
| 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. |
70 | $4 | $20 |
| New patient office visit, complex (60-74 min) | 70 | $199 | $780 |
| Urinalysis, manual A manual laboratory examination of a urine sample to check for various substances and cells. |
65 | $3 | $50 |
| 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. |
65 | $1 | $10 |
| 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. |
65 | $1 | $20 |
| Haptoglobin level test A blood test that measures the amount of haptoglobin, a protein in the serum. It helps evaluate red blood cell breakdown. |
63 | $12 | $75 |
| Venipuncture for blood collection A procedure to draw blood from a vein for medical testing or analysis. |
62 | $92 | $400 |
| Hemoglobin A1c test (diabetes monitoring) A blood test that measures your average blood sugar levels over the past two to three months. |
48 | $10 | $50 |
| 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. |
47 | $58 | $226 |
| 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. |
43 | $16 | $75 |
| Free thyroxine (T4) test A blood test that measures the level of free thyroxine, a thyroid hormone, in the bloodstream. |
43 | $9 | $30 |
| Additional hour of intravenous chemotherapy This code represents the administration of chemotherapy medication into a vein for each additional hour beyond the initial period. |
43 | $26 | $125 |
| Beta-2 microglobulin level test A blood test that measures the level of beta-2 microglobulin, a protein produced by cells in the body. |
41 | $16 | $50 |
| Office visit for established patient An office visit for an existing patient that may not require the healthcare professional to be present. |
40 | $20 | $100 |
| 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. |
39 | $64 | $420 |
| 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. |
37 | $30 | $120 |
| 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. |
37 | $2 | $10 |
| IgE level test A blood test that measures the level of immunoglobulin E (IgE) proteins in the immune system. |
33 | $16 | $50 |
| Injection, fosnetupitant 235 mg and palonosetron 0.25 mg | 27 | $335 | $2,100 |
| Acute hepatitis panel A blood test that screens for markers of acute viral hepatitis infection. |
26 | $47 | $175 |
| Thyroxine (T4) level test A blood test that measures the total amount of thyroxine, a thyroid hormone, in your body. |
26 | $7 | $35 |
| 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. |
21 | $79 | $300 |
| Immunologic analysis for detection of tumor antigen, quantitative; ca 125 | 20 | $20 | $50 |
| Calreticulin gene analysis A laboratory test that analyzes the calreticulin gene for common genetic variants. |
19 | $119 | $490 |
| Gene analysis (janus kinase 2) variant | 19 | $90 | $370 |
| JAK2 gene analysis A laboratory test that examines the JAK2 gene to identify specific genetic variations. |
19 | $182 | $741 |
| MPL gene analysis for common variants A laboratory test that analyzes the MPL gene to detect common genetic variants. This procedure identifies specific changes in the thrombopoietin receptor gene. |
19 | $147 | $602 |
| Molecular pathology test interpretation A physician reviews and interprets the results of a molecular pathology test to provide a diagnostic report. |
19 | $42 | $188 |
| 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. |
18 | $5 | $15 |
| Lipid panel (cholesterol and triglycerides) A blood test that measures cholesterol and triglyceride levels. |
17 | $13 | $300 |
| Flu vaccine administration This procedure involves the administration of the influenza virus vaccine. It covers the process of delivering the vaccine to the patient. |
17 | $36 | $40 |
| 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. |
14 | $20 | $50 |
| High-sensitivity C-reactive protein test A blood test that measures high-sensitivity C-reactive protein to detect infection or inflammation. |
13 | $13 | $50 |
| 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. |
13 | $71 | $175 |
| Albumin level test A blood test that measures the amount of albumin, a protein made by the liver, in your body. |
12 | $5 | $35 |
| 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. |
11 | $4 | $10 |
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.
49.6% high complexity
27.5% medium
22.9% routine
Industry Payment Transparency
Open Payments through 2023 ↗$8,854
Total received (2018-2023)
Avg $1,476/year across 6 years
Top 26% in NY for hematology & oncology
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
13
Companies
29
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.
Consulting
Expert advisory fees, typically reflecting recognized clinical expertise
$6,812 (76.9%)
Speaking / Promotional
Speaker programs, honoraria, and industry-sponsored educational events
$1,671 (18.9%)
Meals & Travel
Food, beverages, travel, and lodging — typically low-value
$371 (4.2%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2023
$24
2022
$37
2021
$2,604
2020
$5,979
2019
$80
2018
$131
Payments by company (2023)
Consulting
Speaking
Meals & Travel
Research
CTI BioPharma Corp.
$24
Top 3 companies account for 100.0% of 2023 payments
All-time payments by company (2018-2023) ›
AstraZeneca Pharmaceuticals LP
$5,272
Celgene Corporation
$1,540
Karyopharm Therapeutics Inc.
$1,500
Kite Pharma, Inc.
$160
Seagen Inc.
$99
Merck Sharp & Dohme Corporation
$90
Pharmacyclics LLC, An AbbVie Company
$60
Janssen Pharmaceuticals, Inc
$39
CTI BioPharma Corp.
$24
SANOFI PASTEUR INC.
$21
GENZYME CORPORATION
$20
Sirtex Medical Inc
$17
Gilead Sciences, Inc.
$12
Top 3 companies account for 93.9% of all-time payments
Associated products mentioned in payments ›
CALQUENCE · ELITEK · FLUBLOK QUADRIVALENT · Imbruvica · KEYTRUDA · Revlimid · SIR-Spheres Microspheres · Vonjo · XARELTO · XPOVIO
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 →
The majority of payments (77%) are consulting fees, which typically reflect recognized clinical expertise sought by manufacturers.
Geographic Context
Hematology & oncology specialists within 10 mi
89
Per 100K population
5.8
County median income
$128,329
Nearest hospital
JOHN T MATHER MEMORIAL HOSPITAL OF PORT JEFFERSON
3.1 mi
3.1 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 2023 |
| 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. Li Pera is a mixed practice specialist, with above-average Medicare volume (top 5% in NY), with consulting-driven industry engagement, with 21 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. Li Pera experienced with iron infusion (injectafer)?
Based on Medicare claims data, Dr. Li Pera performed 56,251 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. Li Pera receive payments from pharmaceutical companies?
Yes. Dr. Li Pera received a total of $8,854 from 13 companies across 29 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. Li Pera's costs compare to other hematology & oncology specialists in Port Jefferson Station?
Dr. Li Pera's average Medicare payment per service is $7. 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. Li Pera) 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 →
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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.
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