Medicare Enrolled
Dr. Lynn Van Ummersen, MD
Medical Oncology · Orange City, FL
Practice pattern: Mixed Practice
— Diverse clinical practice across multiple procedure types
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. Van Ummersen 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. Van Ummersen
Dr. Lynn Van Ummersen is a medical oncology specialist in Orange City, FL, with 20 years of NPI registration. Based on federal Medicare data, Dr. Van Ummersen performed 31,299 Medicare services in 2023. These records do not provide a deduplicated patient total.
Between the years covered by Open Payments, Dr. Van Ummersen received a total of $5,924 from 60 pharmaceutical and/or device companies across 327 payment records. A record can group multiple payments. These transfers are publicly reported through CMS Open Payments. Disclosure alone does not establish their effect on care. A reliable breakdown by payment category is not available in this snapshot. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Van Ummersen 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 of NPI registration
▲ Top 39% volume in FL
$5,924 industry payments
Florida License Status
FL DOH · MQA1
Active license
None
Board action on record
0
Recent admin complaints
| Profession | License # | Status | Expires | Board Action |
|---|---|---|---|---|
| Medical Doctor | 99045 | Clear | January 31, 2027 | — |
Data from Florida Department of Health Medical Quality Assurance.
License records are public under Chapter 119, Florida Statutes.
Verify directly on FL DOH →
Medicare Practice Summary — 2023
Medicare Utilization ↗31,299
Medicare services
Top 39% in FL for medical oncology
Not available
Unique patients (not deduplicated)
$5
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
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 (Feraheme) An injection of ferumoxytol used to treat iron deficiency anemia in patients not on dialysis. |
15,300 | $0 | $4 |
| Iron sucrose injection (Venofer) An injection of iron sucrose used to replenish iron levels in the body. |
5,600 | $0 | $5 |
| Denosumab injection (Prolia/Xgeva) | 3,480 | $19 | $51 |
| Epoetin alfa injection (Procrit) for anemia An injection of epoetin alfa containing 1000 units for use in patients not on end-stage renal disease (ESRD) dialysis. |
2,240 | $6 | $23 |
| Dexamethasone injection (steroid) An injection of dexamethasone sodium phosphate, a corticosteroid medication, administered in a dose of 1 milligram. |
787 | $0 | $3 |
| 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. |
663 | $8 | $29 |
| Blood draw (venipuncture) Insertion of a needle into a vein to collect a blood sample. |
650 | $8 | $9 |
| Anti-nausea injection (Aloxi/palonosetron) | 580 | $1 | $28 |
| 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. |
411 | $10 | $69 |
| 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. |
313 | $67 | $239 |
| Anti-nausea injection (ondansetron/Zofran) | 216 | $0 | $9 |
| Vitamin B-12 injection An injection of vitamin B-12 (cyanocobalamin) with a dose of up to 1000 mcg. |
216 | $1 | $6 |
| 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. |
167 | $48 | $189 |
| Intravenous chemotherapy infusion, 1 hour or less Administration of chemotherapy medication directly into a vein. The procedure takes one hour or less to complete. |
110 | $94 | $378 |
| 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. |
96 | $22 | $84 |
| Intravenous injection of additional new drug or substance Administration of an additional new medication or substance directly into a vein. |
81 | $11 | $61 |
| Additional hour of intravenous infusion This code represents each additional hour of intravenous infusion beyond the initial hour for therapy, prevention, or diagnosis. |
75 | $15 | $56 |
| 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. |
54 | $1 | $7 |
| 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. |
38 | $97 | $339 |
| Office visit for established patient An office visit for an existing patient that may not require the healthcare professional to be present. |
36 | $16 | $59 |
| 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. |
34 | $9 | $42 |
| Automated urinalysis An automated laboratory test performed on a urine sample to analyze its chemical and physical properties. The procedure uses machinery to detect various substances and cells within the urine. |
31 | $2 | $8 |
| Initial hospital admission, moderate complexity Initial hospital inpatient or observation care for a new patient involving moderate-level medical decision making, with at least 55 minutes total time on the date of the encounter. |
27 | $103 | $377 |
| Intravenous drug injection A procedure involving the administration of a medication or substance directly into a vein. |
24 | $26 | $156 |
| Hospital follow-up visit, low complexity Follow-up hospital visit for an established patient with straightforward or low-level medical decision making. The visit requires at least 25 minutes of time spent on the day of service. |
22 | $40 | $109 |
| Diphenhydramine injection, up to 50 mg An injection of diphenhydramine hydrochloride, an antihistamine medication, administered in a dose of up to 50 milligrams. |
22 | $1 | $3 |
| New patient office visit (30-44 min) An initial office visit for a new patient lasting between 30 and 44 minutes. This code is used when the total time spent on the date of the encounter falls within this range. |
13 | $77 | $298 |
| Methylprednisolone injection, up to 40 mg An injection of methylprednisolone sodium succinate, a corticosteroid medication, administered in a dose of up to 40 mg. |
13 | $3 | $11 |
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. These counts do not measure clinical quality or years of experience.
50.5% high complexity
43.7% medium
5.8% routine
Industry Payment Transparency
Open Payments through 2024 ↗$5,924
Total received (2018-2024)
Avg $846/year across 7 years
Bottom 46% in FL for medical oncology
60
Companies
327
Payment records
Payments are publicly reported; disclosure does not establish legality · Not evidence of wrongdoing · How to interpret →
Payment categories are unavailable while the source breakdown is being rebuilt. Company and year totals do not identify how much belongs to each category.
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$1,732
2023
$1,435
2022
$990
2021
$323
2020
$331
2019
$733
2018
$380
Payments by company (2024)
Novartis Pharmaceuticals Corporation
$236
Merck Sharp & Dohme LLC
$151
Gilead Sciences, Inc.
$144
Janssen Biotech, Inc.
$119
ABBVIE INC.
$118
Eisai Inc.
$90
AstraZeneca Pharmaceuticals LP
$82
Alexion Pharmaceuticals, Inc.
$76
Incyte Corporation
$75
Daiichi Sankyo Inc.
$72
Lilly USA, LLC
$50
BeiGene USA, Inc.
$48
Celgene Corporation
$47
JAZZ PHARMACEUTICALS INC.
$45
PFIZER INC.
$45
SOBI, INC
$36
SERVIER PHARMACEUTICALS LLC
$35
Mirati Therapeutics, Inc.
$35
Napo Pharmaceuticals Inc
$31
Takeda Pharmaceuticals U.S.A., Inc.
$29
Tolmar, Inc.
$24
PharmaEssentia USA Corporation
$23
Pharmacosmos Therapeutics Inc.
$21
Deciphera Pharmaceuticals Inc.
$21
Agios Pharmaceuticals, Inc.
$17
Regeneron Healthcare Solutions, Inc.
$16
GENZYME CORPORATION
$16
E.R. Squibb & Sons, L.L.C.
$16
GlaxoSmithKline, LLC.
$15
Top 3 companies account for 30.6% of 2024 payments
All-time payments by company (2018-2024) ›
Novartis Pharmaceuticals Corporation
$947
Janssen Biotech, Inc.
$468
Celgene Corporation
$287
E.R. Squibb & Sons, L.L.C.
$256
Genentech USA, Inc.
$255
PFIZER INC.
$250
Daiichi Sankyo Inc.
$223
Lilly USA, LLC
$223
ABBVIE INC.
$207
Pharmacyclics LLC, An AbbVie Company
$193
Merck Sharp & Dohme LLC
$185
Incyte Corporation
$184
Gilead Sciences, Inc.
$166
GENZYME CORPORATION
$161
Eisai Inc.
$139
AstraZeneca Pharmaceuticals LP
$137
Astellas Pharma US Inc
$112
Amgen Inc.
$109
Seagen Inc.
$88
Alexion Pharmaceuticals, Inc.
$76
GlaxoSmithKline, LLC.
$73
JAZZ PHARMACEUTICALS INC.
$68
TerSera Therapeutics LLC
$60
Bayer HealthCare Pharmaceuticals Inc.
$55
SERVIER PHARMACEUTICALS LLC
$55
Takeda Pharmaceuticals U.S.A., Inc.
$52
EMD Serono, Inc.
$52
SOBI, INC
$50
BeiGene USA, Inc.
$48
Sun Pharmaceutical Industries Inc.
$45
Stemline Therapeutics Inc.
$42
EISAI INC.
$39
Blueprint Medicines Corporation
$36
Lexicon Pharmaceuticals, Inc.
$35
CTI BioPharma Corp.
$35
Mirati Therapeutics, Inc.
$35
Merck Sharp & Dohme Corporation
$34
Napo Pharmaceuticals Inc
$31
Global Blood Therapeutics, Inc.
$30
Agios Pharmaceuticals, Inc.
$30
Bayer Healthcare Pharmaceuticals Inc.
$26
Adaptive Biotechnologies Corporation
$26
Tolmar, Inc.
$24
PharmaEssentia USA Corporation
$23
Pharmacyclics LLC, an AbbVie Company
$22
Pharmacosmos Therapeutics Inc.
$21
Deciphera Pharmaceuticals Inc.
$21
Secura Bio, Inc.
$20
Rigel Pharmaceuticals, Inc.
$20
Dova Pharmaceuticals
$20
Emmaus Medical, Inc.
$19
Regeneron Healthcare Solutions, Inc.
$16
Ipsen Biopharmaceuticals, Inc
$16
Puma Biotechnology, Inc.
$15
GT Medical Technologies, Inc
$14
Kyowa Kirin, Inc.
$13
Exelixis Inc.
$12
AMAG Pharmaceuticals, Inc.
$12
Aurobindo Pharma USA, Inc.
$11
Veracyte, Inc.
$1
Top 3 companies account for 28.7% of all-time payments
Associated products mentioned in payments ›
ADAKVEO · ADCETRIS · ALIMTA · AYVAKIT · Alecensa · Aliqopa · Avastin · BAVENCIO · BENLYSTA · BESREMI · BOSULIF · BRUKINSA · Bavencio · CABLIVI · CALQUENCE · COSELA · CYRAMZA · Cabometyx · Columvi · DARZALEX · DOPTELET · Doptelet · ELIGARD · ELITEK · ENHERTU · EPKINLY · Endari · Enhertu · Erleada · FARYDAK · FERAHEME · FRUZAQLA · Fabhalta · Farydak · GAZYVA · GELCLAIR CONCENTRATED ORAL GEL · GammaTile · IBRANCE · IMBRUVICA · IMFINZI · INJECTAFER · Imbruvica · JAKAFI · JEVTANA · KEYTRUDA · KISQALI · KRAZATI · Kadcyla · Kyprolis · LIBTAYO · LUMAKRAS · LUTATHERA · LYNPARZA · Lenvima · MEKINIST · MVASI · Marqibo · Nerlynx · Nubeqa · ODOMZO (sonidegib) capsules · OJJAARA · OPDIVO · OPDUALAG · OXBRYTA · Orserdu · PADCEV · PEMAZYRE · PIQRAY · PLUVICTO · POTELIGEO · PROMACTA · PYRUKYND · Perjeta · Pomalyst · QINLOCK · REBLOZYL · RYBREVANT · Revlimid · Rituxan Hycela · SARCLISA · SCEMBLIX · SOMATULINE DEPOT · TABRECTA · TALVEY · TASIGNA · TECENTRIQ · TECVAYLI · TIBSOVO · TIVDAK · TUKYSA · Tavalisse · Tibsovo · Trodelvy · ULTOMIRIS · VENCLEXTA · VERZENIO · Vanflyta · Vitrakvi · Vonjo · XALKORI · XOSPATA · XTANDI · Xermelo · Xofigo · Xospata · YONSA · ZEJULA · ZEPZELCA · Zoladex · clonoSEQ
Should you be concerned? Industry payments are disclosed through CMS Open Payments. Disclosure alone does not establish their purpose, legality, or effect on care. 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 →
Geographic Context
Medical oncologists in nearby ZIP areas
13
County median income
$66,581
Nearest hospital to ZIP centroid (approximate)
ADVENTHEALTH FISH MEMORIAL
0.0 mi
0.0 mi
Data Sources
| Provider Registry | ✓ NPPES | NPPES snapshot; verify current record |
| Medicare Enrollment | ✓ PECOS | PECOS snapshot |
| Practice Data | ✓ Medicare Util. | Annual (CY lag) |
| Industry Payments | ✓ Open Payments | CY 2024 |
| Disciplinary History | — Not included | 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. Van Ummersen is a mixed practice specialist, with moderate Medicare volume, 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. Van Ummersen experienced with iron infusion (feraheme)?
Based on Medicare claims data, Dr. Van Ummersen performed 15,300 iron infusion (feraheme) services. These records cover Medicare fee-for-service activity, including eligible younger beneficiaries; they do not measure total practice volume or clinical quality.
Does Dr. Van Ummersen receive payments from pharmaceutical companies?
Yes. Dr. Van Ummersen received a total of $5,924 from 60 companies across 327 payment records. A record can group multiple payments. These transfers are publicly disclosed through CMS Open Payments. Disclosure alone does not establish their legality or effect on care. 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. Van Ummersen's costs compare to other medical oncologists in Orange City?
Dr. Van Ummersen's average Medicare payment per service is $5. 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. Van Ummersen) 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 the presence of registry, enrollment, activity or payment records, not verified experience or clinical quality. 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?
Source publication dates and the snapshots loaded on this site can differ. Rebuilding a page does not refresh its source records. Check the Medicare reporting year and the payment interval shown above; consult the linked official sources for newer releases and current registry details. See our data freshness policy →
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About this page
This page combines public CMS records with calculated summaries and explanatory procedure labels. These transformations are not verbatim federal records. Sources: 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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