NPI registry status
Active
2026 NPPES data Nephrology Physician NPI 1417921958 DO
Verify on CMS → Mark Oxman, DO
Nephrology Physician in Dayton, Ohio.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 10,806 in Nephrology Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
2K
Medicare Part D claims · 402 beneficiaries · Nephrology Physician avg: 2K
Industry payments
$251.34
17 payments · CMS Open Payments (Sunshine Act)
What the federal data shows
Mark Oxman, DO filed 2,479 Medicare Part D claims in 2024 as a Nephrology Physician in Dayton, Ohio.
- 2K
- Part D claims, 2024
- Likely
- board-certified (heuristic)
- ≥86th
- pct by Part D claim volume (lower-bound band)
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Federal trust snapshot
What official records show about Mark Oxman, DO
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1417921958), first enumerated 02/13/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 2,479 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
2 CMS Care Compare hospital affiliations on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Reported
Industry payment transparency
$251.34 in reported industry payments (17 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- State context
State board disciplinary context
Ohio statewide board action statistics are published annually — these figures describe aggregate state activity, not Mark Oxman, DO's individual license status. Verify directly with the state medical board.
Source: OMB annual report 2023
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1417921958 · Nephrology Physician
NPI-10 · ENUM-LEGACY · TAX-MID · RX-MID · BOOK-THIN · PHOTO-ENUM
- NPI-10 1417921958
- ENUM-LEGACY 2006
- TAX-MID 11K Nephrology Physician
- RX-MID 2,479
- BOOK-THIN 377 in Ohio
- PHOTO-ENUM Amy Matayoshi, M.D. · 2006
Mark Oxman, DO's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
2,479 ≥ 86th percentile 86% of 1,416,883 prescribers are in lower value bands
Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2024
✓
Board certification likely (heuristic, not verified)
Mark Oxman, DO practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 2 hospital affiliations - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Mark Oxman, DO?
Quality data not reportedPrimary specialty
Nephrology Physician
Medicare Part D claims
2,479 64% vs specialty avg
Specialty distribution in Ohio
How Nephrology Physician compares to other specialties among Ohio providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Nephrology Physician. Verify directly:
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Practice Address
Provider Details
| NPI | 1417921958 |
|---|---|
| Specialty | Nephrology Physician |
| Credentials | DO |
| Gender | Male |
| NPI Issued | 02/13/2006 |
Hospital and facility affiliations
Facilities where Mark Oxman, DO bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
Nephrology Associates OF Dayton Inc
Eaton, OH
Renal Physicians Inc
Dayton, OH
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Mark Oxman, DO. Source: openpaymentsdata.cms.gov.
Total received
$251
Largest payer
Novartis Pharmaceuticals Corporation
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
License & disciplinary context - Ohio OMB 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~48K Ohio medical licensees in 2023 - they are NOT specific to Mark Oxman, DO. To verify Mark Oxman, DO's current license status, search the OMB public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
158
Total board actions, Ohio 2023
Across 154 cases
3.29
Actions per 1,000 licensees
Ohio statewide rate
probation
Most common action type
56 cases
OMB publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Ohio disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2024.
2,479
Total Claims
$282K
Total Drug Cost
402
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 6,142.367
- Total Day Supply
- 181,356
- Generic Drug Cost
- $78K
- Antibiotic Claims
- 43
Patient Demographics
- Average Patient Age
- 69.0 years
- Avg HCC Risk Score
- 5.95
- Gender Split
- 48% female / 52% male
- Age Distribution
- <65: 107, 65-74: 136, 75-84: 127, 85+: 32
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Mark Oxman, DO prescribes most
Top Medicare Part D drugs by claim count, 2024
- Losartan Potassium
Losartan Potassium
158 claims
- Nifedipine Er
Nifedipine Er
156 claims
- Carvedilol
Carvedilol
147 claims
- Torsemide
Torsemide
132 claims
- Furosemide
Furosemide
123 claims
- Calcitriol
Calcitriol
119 claims
- Amlodipine Besylate
Amlodipine Besylate
117 claims
- Sevelamer Carbonate
Sevelamer Carbonate
102 claims
| Drug | Claims |
|---|---|
| Losartan Potassium | 158 |
| Nifedipine Er Nifedipine | 156 |
| Carvedilol | 147 |
| Torsemide | 132 |
| Furosemide | 123 |
| Calcitriol | 119 |
| Amlodipine Besylate | 117 |
| Sevelamer Carbonate | 102 |
| Doxazosin Mesylate | 89 |
| Irbesartan | 89 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Nephrology Physician Overview
How Mark Oxman, DO fits within the Nephrology Physician landscape nationally.
10,806
Nephrology Physician Providers in US
55
States with Nephrology Physician
1,511
Avg Claims per Provider
Mark Oxman, DO's 2,479 claims are above the specialty average of 1,511.
Nationwide Nephrology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Oxman, both outside Ohio so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Nephrology Physician Providers in Ohio
Other clinicians with the same primary specialty enrolled in Ohio, drawn from the same CMS NPPES roster as Oxman.
One of 377 Nephrology Physician providers enrolled in Ohio, 5 are shown here.
Dr. Randa Abd Algayoum
MD
Cleveland, OH
Dr. Tariq Abdulkarim
M.D.
Columbus, OH
Dr. Syed Abidi
M.D.
Toledo, OH
Dr. Ahmed Aburahma
MD
Cleveland, OH
Dr. Akinfemi Afolabi
M.D.
Oregon, OH
Compare Nephrology Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Mark Oxman, DO's specialty? ▼
Mark Oxman, DO specializes in Nephrology Physician and practices in Dayton, Ohio. Credentials: DO.
How much does Mark Oxman, DO prescribe under Medicare Part D? ▼
In 2024, Mark Oxman, DO wrote 2,479 Medicare Part D claims totaling $282K in drug costs for 402 beneficiaries.
Where is Mark Oxman, DO located? ▼
Mark Oxman, DO is located at 7700 WASHINGTON VILLAGE DR, Dayton, OH, 45459. Phone: (937) 438-3132.
What is Mark Oxman, DO's NPI number? ▼
Mark Oxman, DO's National Provider Identifier (NPI) is 1417921958, issued on 02/13/2006.
How many Nephrology Physician providers are there in the US? ▼
There are 10,806 Nephrology Physician providers across 55 states in the US. The average Nephrology Physician provider writes 1,511 Medicare Part D claims per year.
What drugs does Mark Oxman, DO prescribe most often? ▼
Based on 2024 Medicare Part D data, Mark Oxman, DO's most frequently prescribed drugs include Losartan Potassium, Nifedipine Er, Carvedilol. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Mark Oxman, DO accept Medicare? ▼
Mark Oxman, DO appears in CMS Medicare data with 2,479 Part D claims and 402 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Mark Oxman, DO's credentials? ▼
Mark Oxman, DO's NPI is 1417921958 with credentials DO. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2024). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of August 2026 (NPPES) / 2024 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of August 2026.