Dr. Lynn Van Ummersen, MD
What this data tells you about Dr. Van Ummersen
Dr. Lynn Van Ummersen is a medical oncology in Orange City, FL, with 20 years in practice. Based on federal Medicare data, Dr. Van Ummersen performed 31,299 Medicare services across 1,345 unique beneficiaries.
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 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in medical 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. Van Ummersen is Very High — reflecting how much public federal data is available about this provider. This is not a quality rating. Patients are encouraged to use this data as one of several factors when choosing a healthcare provider.
Medicare Practice Summary
Medicare Utilization ↗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) | 15,300 | $0 | $4 |
| Iron sucrose injection (Venofer) | 5,600 | $0 | $5 |
| Denosumab injection (Prolia/Xgeva) | 3,480 | $19 | $51 |
| Epoetin alfa injection (Procrit) for anemia | 2,240 | $6 | $23 |
| Dexamethasone injection (steroid) | 787 | $0 | $3 |
| Complete blood count (CBC) with differential | 663 | $8 | $29 |
| Blood draw (venipuncture) | 650 | $8 | $9 |
| Anti-nausea injection (Aloxi/palonosetron) | 580 | $1 | $28 |
| Drug injection, under skin or into muscle | 411 | $10 | $69 |
| Office visit, established patient (20-29 min) | 313 | $67 | $239 |
| Anti-nausea injection (ondansetron/Zofran) | 216 | $0 | $9 |
| Injection, vitamin b-12 cyanocobalamin, up to 1000 mcg | 216 | $1 | $6 |
| Infusion into a vein for therapy, prevention, or diagnosis, 1 hour or less | 167 | $48 | $189 |
| Administration of chemotherapy into vein, 1 hour or less | 110 | $94 | $378 |
| Infusion into a vein for therapy, prevention, or diagnosis, additional sequential infusion, 1 hour or less | 96 | $22 | $84 |
| Injection of additional new drug or substance into vein | 81 | $11 | $61 |
| Infusion into a vein for therapy, prevention, or diagnosis, each additional hour | 75 | $15 | $56 |
| Infusion, normal saline solution, sterile (500 ml = 1 unit) | 54 | $1 | $7 |
| Office visit, established patient (30-39 min) | 38 | $97 | $339 |
| Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional | 36 | $16 | $59 |
| Infusion into a vein for hydration, each additional hour | 34 | $9 | $42 |
| Automated urinalysis | 31 | $2 | $8 |
| Initial hospital admission, moderate complexity | 27 | $103 | $377 |
| Injection of drug or substance into vein | 24 | $26 | $156 |
| Hospital follow-up visit, low complexity | 22 | $40 | $109 |
| Injection, diphenhydramine hcl, up to 50 mg | 22 | $1 | $3 |
| New patient office visit (30-44 min) | 13 | $77 | $298 |
| Injection, methylprednisolone sodium succinate, up to 40 mg | 13 | $3 | $11 |
Industry Payment Transparency
Open Payments through 2024 ↗Payment profile
Industry payments classified by relationship type. Not all payments are equal — research and consulting reflect different relationships than speaking programs or meals.
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
Payments by company (2024)
Associated products mentioned in payments ›
Most payments (97%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians.
Geographic Context
0.0 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 measures how much public data is available about a provider — not how good they are. How we calculate this →
Summary
Dr. Van Ummersen is a mixed practice specialist, with moderate Medicare volume, and low-engagement industry engagement, with 20 years of practice experience.
This summary is auto-generated from federal data. It describes data availability and patterns — not clinical quality. Read our methodology →
Frequently Asked Questions
Is Dr. Van Ummersen experienced with iron infusion (feraheme)?
Does Dr. Van Ummersen receive payments from pharmaceutical companies?
How do Dr. Van Ummersen's costs compare to other medical oncologys in Orange City?
What does Data Coverage mean?
Is this data up to date?
Explore related providers
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. The Transparency Score measures 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