NPI registry status
Active
2026 NPPES data Physical Medicine & Rehabilitation Physician NPI 1467419945 MD
Verify on CMS → Keyan Ma, MD
Physical Medicine & Rehabilitation Physician in New York, New York.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 15,336 in Physical Medicine & Rehabilitation 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
54
Medicare Part D claims · 29 beneficiaries · Physical Medicine & Rehabilitation Physician avg: 781
Generic prescribing
33%
generic claims · 67% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Keyan Ma, MD filed 54 Medicare Part D claims in 2023 as a Physical Medicine & Rehabilitation Physician in New York, New York, prescribing 33% generic.
- 54
- Part D claims, 2023
- 33%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥0th
- 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 Keyan Ma, MD
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 1467419945), first enumerated 04/27/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 54 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
- State context
State board disciplinary context
New York statewide board action statistics are published annually — these figures describe aggregate state activity, not Keyan Ma, MD's individual license status. Verify directly with the state medical board.
Source: NYSBPMC 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 1467419945 · Physical Medicine & Rehabilitation Physician
NPI-10 · ENUM-LEGACY · TAX-MID · RX-TRACE · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1467419945
- ENUM-LEGACY 2006
- TAX-MID 15K Physical Medicine
- RX-TRACE 54
- BOOK-LIGHT 1,335 in New York
- PHOTO-ENUM Susan Pundt · 2006
Keyan Ma, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
54 ≥ 0th percentile 0% of 1,370,886 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 · 2023
✓
Board certification likely (heuristic, not verified)
Keyan Ma, MD 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 Keyan Ma, MD?
Quality data not reportedPrimary specialty
Physical Medicine & Rehabilitation Physician
Medicare Part D claims
54 93% vs specialty avg
Specialty distribution in New York
How Physical Medicine & Rehabilitation Physician compares to other specialties among New York 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 Physical Medicine & Rehabilitation 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 | 1467419945 |
|---|---|
| Specialty | Physical Medicine & Rehabilitation Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 04/27/2006 |
Hospital and facility affiliations
Facilities where Keyan Ma, MD 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.
Dr. Ma's Manhattan Medical Rehabilitation, PC
New York, NY
Dr. Ma's Medical Rehab., P.C.
New York, NY
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
License & disciplinary context - New York NYSBPMC 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 ~100K New York medical licensees in 2023 - they are NOT specific to Keyan Ma, MD. To verify Keyan Ma, MD's current license status, search the NYSBPMC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
312
Total board actions, New York 2023
Across 302 cases
3.12
Actions per 1,000 licensees
New York statewide rate
probation
Most common action type
89 cases
NYSBPMC 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 New York disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Brand-heavy
Keyan Ma, MD - brand share 67.0%
Physical Medicine & Rehabilitation Physician average
67% brand-name claims vs 33% generic, on 54 2023 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 2023.
54
Total Claims
$22K
Total Drug Cost
29
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 57
- Total Day Supply
- 1,399
- Brand vs Generic
- 67% brand / 33% generic
- Brand Drug Cost
- $22K
- Generic Drug Cost
- $456
Patient Demographics
- Average Patient Age
- 72.5 years
- Avg HCC Risk Score
- 1.07
- Gender Split
- 62% female / 38% male
- Age Distribution
- <65: 0, 65-74: 22, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
| Drug | Claims |
|---|---|
| Diclofenac Epolamine | 30 |
| Diclofenac Sodium | 12 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Physical Medicine & Rehabilitation Physician in NY →
All providers in New York →
Compare specialties →
Physical Medicine & Rehabilitation Physician Overview
How Keyan Ma, MD fits within the Physical Medicine & Rehabilitation Physician landscape nationally.
15,336
Physical Medicine & Rehabilitation Physician Providers in US
54
States with Physical Medicine & Rehabilitation Physician
781
Avg Claims per Provider
Keyan Ma, MD's 54 claims are below the specialty average of 781.
Nationwide Physical Medicine & Rehabilitation Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Ma, both outside New York 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 Physical Medicine & Rehabilitation Physician Providers in New York
Other clinicians with the same primary specialty enrolled in New York, drawn from the same CMS NPPES roster as Ma.
One of 1,335 Physical Medicine & Rehabilitation Physician providers enrolled in New York, 5 are shown here.
Dr. Chris Abate
PT
Rochester, NY
Dr. Laurel Abbruzzese
PT
New York, NY
Dr. Ehsan Abdeshahian
MD
New York, NY
Dr. Andrew Abdou
DO
White Plains, NY
Marie Abell
Johnson City, NY
Compare Physical Medicine & Rehabilitation Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Keyan Ma, MD's specialty? ▼
Keyan Ma, MD specializes in Physical Medicine & Rehabilitation Physician and practices in New York, New York. Credentials: MD.
How much does Keyan Ma, MD prescribe under Medicare Part D? ▼
In 2023, Keyan Ma, MD wrote 54 Medicare Part D claims totaling $22K in drug costs for 29 beneficiaries.
Where is Keyan Ma, MD located? ▼
Keyan Ma, MD is located at 115 E 61ST ST, New York, NY, 10021. Phone: (212) 872-1745.
What is Keyan Ma, MD's NPI number? ▼
Keyan Ma, MD's National Provider Identifier (NPI) is 1467419945, issued on 04/27/2006.
Does Keyan Ma, MD prescribe more brand-name or generic drugs? ▼
Keyan Ma, MD's prescribing is 67% brand-name and 33% generic drugs by claim count, with $22K in brand drug costs.
How many Physical Medicine & Rehabilitation Physician providers are there in the US? ▼
There are 15,336 Physical Medicine & Rehabilitation Physician providers across 54 states in the US. The average Physical Medicine & Rehabilitation Physician provider writes 781 Medicare Part D claims per year.
What drugs does Keyan Ma, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Keyan Ma, MD's most frequently prescribed drugs include Diclofenac Epolamine, Diclofenac Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Keyan Ma, MD accept Medicare? ▼
Keyan Ma, MD appears in CMS Medicare data with 54 Part D claims and 29 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Keyan Ma, MD's credentials? ▼
Keyan Ma, MD's NPI is 1467419945 with credentials MD. 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 (2023). 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 April 2026 (NPPES) / 2023 (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 May 2026.