Medicare Enrolled
Dr. Mark Knapp, MD
Medical Oncology · Columbus, OH
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. Knapp 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. Knapp
Dr. Mark Knapp is a medical oncology specialist in Columbus, OH, with 20 years of NPI registration. Based on federal Medicare data, Dr. Knapp performed 19,890 Medicare services in 2023. These records do not provide a deduplicated patient total.
Between the years covered by Open Payments, Dr. Knapp received a total of $70,210 from 57 pharmaceutical and/or device companies across 230 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. Knapp 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 15% volume in OH
$70,210 industry payments
Medicare Practice Summary — 2023
Medicare Utilization ↗19,890
Medicare services
Top 15% in OH for medical oncology
Not available
Unique patients (not deduplicated)
$11
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 |
|---|---|---|---|
| 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. |
9,620 | $6 | $25 |
| Contrast dye for imaging (iodine-based) A contrast agent containing 300-399 mg/ml of iodine used to enhance imaging studies. It is administered per milliliter to improve the visibility of internal structures. |
3,902 | $0 | $1 |
| Iron infusion (Monoferric) | 2,500 | $16 | $74 |
| 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. |
959 | $8 | $29 |
| Dexamethasone injection (steroid) An injection of dexamethasone sodium phosphate, a corticosteroid medication, administered in a dose of 1 milligram. |
620 | $0 | $1 |
| 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. |
489 | $58 | $277 |
| 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. |
358 | $91 | $390 |
| 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. |
304 | $10 | $67 |
| Blood draw (venipuncture) Insertion of a needle into a vein to collect a blood sample. |
239 | $8 | $9 |
| Intravenous chemotherapy infusion, 1 hour or less Administration of chemotherapy medication directly into a vein. The procedure takes one hour or less to complete. |
213 | $91 | $421 |
| Enhanced Oncology Model monthly payment This code represents the monthly enhanced oncology services payment under the Enhancing Oncology Model. It covers the administrative payment for enhanced services provided to eligible patients. |
85 | $75 | $210 |
| 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. |
75 | $20 | $103 |
| Basic metabolic blood panel A blood test that measures a group of basic chemicals, including total calcium levels. |
67 | $8 | $26 |
| 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. |
55 | $45 | $208 |
| Automated red blood cell count An automated laboratory test that measures the number of red blood cells in a blood sample. |
49 | $4 | $12 |
| Intravenous injection of additional new drug or substance Administration of an additional new medication or substance directly into a vein. |
46 | $10 | $66 |
| Blood creatinine level test A blood test that measures the amount of creatinine, a waste product from muscle wear and tear, to help assess kidney function. |
41 | $5 | $16 |
| Hospital follow-up visit, moderate complexity Follow-up hospital visit for an existing patient involving moderate medical decision making. The visit requires at least 35 minutes of time spent on the date of service. |
40 | $60 | $214 |
| 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. |
36 | $42 | $180 |
| CT scan of chest with contrast A computed tomography scan of the chest using a contrast dye to enhance the visibility of internal structures. |
33 | $45 | $373 |
| Intravenous drug injection A procedure involving the administration of a medication or substance directly into a vein. |
31 | $27 | $121 |
| 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. |
31 | $118 | $509 |
| CT scan of abdomen and pelvis with contrast A CT scan that uses dye to create detailed images of the abdomen and pelvis. This imaging test helps doctors examine internal organs and structures in these areas. |
27 | $149 | $743 |
| 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. |
22 | $130 | $550 |
| 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. |
20 | $100 | $406 |
| Methylprednisolone injection, up to 40 mg An injection of methylprednisolone sodium succinate, a corticosteroid medication, administered in a dose of up to 40 mg. |
16 | $3 | $13 |
| 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. |
12 | $134 | $595 |
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.
14.3% high complexity
73.4% medium
12.3% routine
Industry Payment Transparency
Open Payments through 2024 ↗$70,210
Total received (2018-2024)
Avg $10,030/year across 7 years
Top 6% in OH for medical oncology
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
57
Companies
230
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
$15,136
2023
$7,740
2022
$12,806
2021
$8,991
2020
$4,256
2019
$9,872
2018
$11,409
Payments by company (2024)
Pharmacosmos Therapeutics Inc.
$7,280
Daiichi Sankyo Inc.
$6,405
Blueprint Medicines Corporation
$1,008
E.R. Squibb & Sons, L.L.C.
$144
JAZZ PHARMACEUTICALS INC.
$119
Novartis Pharmaceuticals Corporation
$41
Novo Nordisk Inc
$28
Aveo Pharmaceuticals, Inc.
$20
Adaptive Biotechnologies Corporation
$20
ABBVIE INC.
$19
Celgene Corporation
$17
Fennec Pharmaceuticals, Inc.
$17
Kite Pharma, Inc.
$15
Top 3 companies account for 97.1% of 2024 payments
All-time payments by company (2018-2024) ›
Daiichi Sankyo Inc.
$11,934
Pharmacosmos Therapeutics Inc.
$7,280
Kite Pharma, Inc.
$6,916
Rigel Pharmaceuticals, Inc.
$5,842
Incyte Corporation
$5,342
Karyopharm Therapeutics Inc.
$4,968
JAZZ PHARMACEUTICALS INC.
$3,278
AMAG Pharmaceuticals, Inc.
$3,053
GlaxoSmithKline, LLC.
$2,801
BeiGene USA, Inc.
$2,667
Blueprint Medicines Corporation
$2,520
Epizyme, Inc.,
$2,500
Exelixis Inc.
$2,308
Gilead Sciences, Inc.
$1,712
Seattle Genetics, Inc.
$1,644
CTI BioPharma Corp.
$1,457
BeiGene, Ltd.
$450
Athenex Pharmaceutical Division, LLC
$350
Eisai Inc.
$233
Takeda Pharmaceuticals U.S.A., Inc.
$211
Novocure GmbH
$200
Janssen Biotech, Inc.
$191
Celgene Corporation
$180
E.R. Squibb & Sons, L.L.C.
$179
Seagen Inc.
$154
Sirtex Medical Inc
$142
Genentech USA, Inc.
$131
ADC Therapeutics America, Inc.
$129
AstraZeneca Pharmaceuticals LP
$129
Ipsen Biopharmaceuticals, Inc
$128
Lilly USA, LLC
$124
EISAI INC.
$108
Cardinal Health 110 LLC
$100
Novartis Pharmaceuticals Corporation
$97
Taiho Oncology, Inc.
$94
Amgen Inc.
$75
Coherus Biosciences Inc.
$60
EMD Serono, Inc.
$55
Novo Nordisk Inc
$49
Agios Pharmaceuticals, Inc.
$48
Adaptive Biotechnologies Corporation
$37
PFIZER INC.
$33
Acceleron Pharma, Inc.
$33
Foundation Medicine, Inc.
$27
Dendreon Pharmaceuticals LLC
$25
Dova Pharmaceuticals
$25
AbbVie, Inc.
$21
Aveo Pharmaceuticals, Inc.
$20
Merck Sharp & Dohme Corporation
$19
ABBVIE INC.
$19
Regeneron Healthcare Solutions, Inc.
$18
Pharmacyclics LLC, An AbbVie Company
$18
Bayer HealthCare Pharmaceuticals Inc.
$17
Fennec Pharmaceuticals, Inc.
$17
Secura Bio, Inc.
$15
GENZYME CORPORATION
$14
Heron Therapeutics, Inc.
$12
Top 3 companies account for 37.2% of all-time payments
Associated products mentioned in payments ›
ADCETRIS · AYVAKIT · Abraxane · BLENREP · BRUKINSA · Bavencio · Cabometyx · DARZALEX · Doptelet · ELAHERE · EPKINLY · ERLEADA · EXKIVITY · Enhertu · FERAHEME · FOTIVDA · FOUNDATIONONE · Farydak · IBRANCE · IMBRUVICA · INJECTAFER · INQOVI · JAKAFI · JEVTANA · KANJINTI · KEYTRUDA · Kadcyla · Kyprolis · LIBTAYO CEMIPLIMAB-RWLC INJECTION · LYNPARZA · Lenvima · Lonsurf · MONJUVI · MONOFERRIC · NINLARO · ONIVYDE · OPDIVO · Ozempic · PADCEV · PIQRAY · PLUVICTO · PROVENGE · Pedmark · Pomalyst · REBLOZYL · RETEVMO · RYBREVANT · Reblozyl · Revlimid · Rybelsus · SCEMBLIX · SIR-Spheres Microspheres · SOMATULINE DEPOT · SUSTOL · TAZVERIK · TIBSOVO · TUKYSA · Tavalisse · Udenyca · VENCLEXTA · VYXEOS · Venclexta · Vonjo · XGEVA · XPOVIO · XTANDI · Xofigo · Yescarta · ZEJULA · ZEPZELCA · Zydelig · 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
70
County median income
$73,795
Nearest hospital to ZIP centroid (approximate)
RIVER VISTA HEALTH AND WELLNESS LLC
3.7 mi
3.7 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. Knapp is a mixed practice specialist, with above-average Medicare volume (top 15% in OH), 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. Knapp experienced with epoetin alfa injection (procrit) for anemia?
Based on Medicare claims data, Dr. Knapp performed 9,620 epoetin alfa injection (procrit) for anemia 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. Knapp receive payments from pharmaceutical companies?
Yes. Dr. Knapp received a total of $70,210 from 57 companies across 230 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. Knapp's costs compare to other medical oncologists in Columbus?
Dr. Knapp's average Medicare payment per service is $11. 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. Knapp) 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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