NPI registry status
Active
2026 NPPES data Adult Medicine Physician NPI 1336226166 DO
Verify on CMS → Mark Watkins, DO
Adult Medicine Physician in Philadelphia, Pennsylvania.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 2,476 in Adult Medicine 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
5K
Medicare Part D claims · 190 beneficiaries · Adult Medicine Physician avg: 3K
Generic prescribing
65%
generic claims · 33% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$1.8K
67 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Mark Watkins, DO filed 4,879 Medicare Part D claims in 2024 as an Adult Medicine Physician in Philadelphia, Pennsylvania, prescribing 65% generic.
- 5K
- Part D claims, 2024
- 65%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥93rd
- 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 Watkins, 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 1336226166), first enumerated 11/01/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 4,879 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
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Reported
Industry payment transparency
$1.8K in reported industry payments (67 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
Pennsylvania statewide board action statistics are published annually — these figures describe aggregate state activity, not Mark Watkins, DO's individual license status. Verify directly with the state medical board.
Source: PA-BOM 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 1336226166 · Adult Medicine Physician
NPI-10 · ENUM-LEGACY · TAX-NARROW · RX-MID · BOOK-THIN · PHOTO-ENUM
- NPI-10 1336226166
- ENUM-LEGACY 2006
- TAX-NARROW 2,476
- RX-MID 4,879
- BOOK-THIN 81 in Pennsylvania
- PHOTO-ENUM Don Smith, M.D. · 2006
Mark Watkins, DO's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
4,879 ≥ 93rd percentile 93% 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 Watkins, DO practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation - 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 Watkins, DO?
Quality data not reportedPrimary specialty
Adult Medicine Physician
Medicare Part D claims
4,879 68% vs specialty avg
Specialty distribution in Pennsylvania
How Adult Medicine Physician compares to other specialties among Pennsylvania 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 Adult Medicine 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 | 1336226166 |
|---|---|
| Specialty | Adult Medicine Physician |
| Credentials | DO |
| Gender | Male |
| NPI Issued | 11/01/2006 |
Hospital and facility affiliations
Facilities where Mark Watkins, 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.
Mazzoni Center
Philadelphia, PA
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 Watkins, DO. Source: openpaymentsdata.cms.gov.
Total received
$1.8K
Largest payer
ViiV Healthcare Company
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 - Pennsylvania PA-BOM 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 ~45K Pennsylvania medical licensees in 2023 - they are NOT specific to Mark Watkins, DO. To verify Mark Watkins, DO's current license status, search the PA-BOM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
133
Total board actions, Pennsylvania 2023
Across 129 cases
2.96
Actions per 1,000 licensees
Pennsylvania statewide rate
probation
Most common action type
48 cases
PA-BOM 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 Pennsylvania disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Above average
Mark Watkins, DO - brand share 33.0%
Adult Medicine Physician average
33% brand-name claims vs 65% generic, on 4,879 2024 Medicare Part D claims.
The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2024.
4,879
Total Claims
$4.4M
Total Drug Cost
190
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 8,488.533
- Total Day Supply
- 249,016
- Brand vs Generic
- 33% brand / 65% generic
- Brand Drug Cost
- $4.3M
- Generic Drug Cost
- $139K
- Opioid Claims
- 55 (1.1% rate)
- Antibiotic Claims
- 66
Patient Demographics
- Average Patient Age
- 69.3 years
- Avg HCC Risk Score
- 1.17
- Gender Split
- 17% female / 83% male
- Age Distribution
- <65: 30, 65-74: 119, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Mark Watkins, DO prescribes most
Top Medicare Part D drugs by claim count, 2024
- Rosuvastatin Calcium
Rosuvastatin Calcium
215 claims
- Biktarvy
Biktarvy
175 claims
- Amlodipine Besylate
Amlodipine Besylate
154 claims
- Atorvastatin Calcium
Atorvastatin Calcium
128 claims
- Lisinopril
Lisinopril
128 claims
- Gabapentin
Gabapentin
118 claims
- Tivicay
Tivicay
118 claims
- Juluca
Juluca
108 claims
| Drug | Claims |
|---|---|
| Rosuvastatin Calcium | 215 |
| Biktarvy Bictegrav/Emtricit/Tenofov Ala | 175 |
| Amlodipine Besylate | 154 |
| Atorvastatin Calcium | 128 |
| Lisinopril | 128 |
| Gabapentin | 118 |
| Tivicay Dolutegravir Sodium | 118 |
| Juluca Dolutegravir/Rilpivirine | 108 |
| Testosterone | 97 |
| Pifeltro Doravirine | 83 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Adult Medicine Physician Overview
How Mark Watkins, DO fits within the Adult Medicine Physician landscape nationally.
2,476
Adult Medicine Physician Providers in US
52
States with Adult Medicine Physician
2,896
Avg Claims per Provider
Mark Watkins, DO's 4,879 claims are above the specialty average of 2,896.
Nationwide Adult Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Watkins, both outside Pennsylvania 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 Adult Medicine Physician Providers in Pennsylvania
Other clinicians with the same primary specialty enrolled in Pennsylvania, drawn from the same CMS NPPES roster as Watkins.
One of 81 Adult Medicine Physician providers enrolled in Pennsylvania, 5 are shown here.
Dr. Iyalla Adoki
MD
Coraopolis, PA
Dr. Jawad Ahsan
DO
Philadelphia, PA
Lisa Albert
CRNP
Lower Gwynedd, PA
Dr. Syed Atif
MD
Myerstown, PA
Dr. Ramon Baker
M.D.
Kunkletown, PA
Compare Adult Medicine Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Mark Watkins, DO's specialty? ▼
Mark Watkins, DO specializes in Adult Medicine Physician and practices in Philadelphia, Pennsylvania. Credentials: DO.
How much does Mark Watkins, DO prescribe under Medicare Part D? ▼
In 2024, Mark Watkins, DO wrote 4,879 Medicare Part D claims totaling $4.4M in drug costs for 190 beneficiaries.
Where is Mark Watkins, DO located? ▼
Mark Watkins, DO is located at 253 SO 10TH STREET, Philadelphia, PA, 19107. Phone: (215) 829-0170.
What is Mark Watkins, DO's NPI number? ▼
Mark Watkins, DO's National Provider Identifier (NPI) is 1336226166, issued on 11/01/2006.
Does Mark Watkins, DO prescribe more brand-name or generic drugs? ▼
Mark Watkins, DO's prescribing is 33% brand-name and 65% generic drugs by claim count, with $4.3M in brand drug costs.
Does Mark Watkins, DO prescribe opioids? ▼
Yes, Mark Watkins, DO had 55 opioid claims in 2024 with an opioid prescribing rate of 1.1%.
How many Adult Medicine Physician providers are there in the US? ▼
There are 2,476 Adult Medicine Physician providers across 52 states in the US. The average Adult Medicine Physician provider writes 2,896 Medicare Part D claims per year.
What drugs does Mark Watkins, DO prescribe most often? ▼
Based on 2024 Medicare Part D data, Mark Watkins, DO's most frequently prescribed drugs include Rosuvastatin Calcium, Biktarvy, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Mark Watkins, DO accept Medicare? ▼
Mark Watkins, DO appears in CMS Medicare data with 4,879 Part D claims and 190 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Mark Watkins, DO's credentials? ▼
Mark Watkins, DO's NPI is 1336226166 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.