NPI registry status
Active
2026 NPPES data Dermatology Physician NPI 1679645329 MD
Verify on CMS → Cynthia Mates, MD
Dermatology Physician in Martinez, California.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 15,011 in Dermatology 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
774
Medicare Part D claims · 247 beneficiaries · Dermatology Physician avg: 799
Generic prescribing
77%
generic claims · 23% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Cynthia Mates, MD filed 774 Medicare Part D claims in 2024 as a Dermatology Physician in Martinez, California, prescribing 77% generic.
- 774
- Part D claims, 2024
- 77%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥70th
- 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 Cynthia Mates, 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 1679645329), first enumerated 11/15/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 774 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
- State context
State board disciplinary context
California statewide board action statistics are published annually — these figures describe aggregate state activity, not Cynthia Mates, MD's individual license status. Verify directly with the state medical board.
Source: MBC 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 1679645329 · Dermatology Physician
NPI-10 · ENUM-LEGACY · TAX-MID · RX-LIGHT · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1679645329
- ENUM-LEGACY 2006
- TAX-MID 15K Dermatology Physician
- RX-LIGHT 774
- BOOK-LIGHT 2,004 in California
- PHOTO-ENUM Laura Marquart, MD · 2006
Cynthia Mates, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
774 ≥ 70th percentile 70% 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)
Cynthia Mates, MD 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 Cynthia Mates, MD?
Quality data not reportedPrimary specialty
Dermatology Physician
Medicare Part D claims
774 3% vs specialty avg
Specialty distribution in California
How Dermatology Physician compares to other specialties among California 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 Dermatology 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 | 1679645329 |
|---|---|
| Specialty | Dermatology Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 11/15/2006 |
Hospital and facility affiliations
Facilities where Cynthia Mates, 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.
Permanente Medical Group Inc
Richmond, CA
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 - California MBC 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 ~150K California medical licensees in 2023 - they are NOT specific to Cynthia Mates, MD. To verify Cynthia Mates, MD's current license status, search the MBC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
576
Total board actions, California 2023
Across 556 cases
3.84
Actions per 1,000 licensees
California statewide rate
probation
Most common action type
186 cases
MBC 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 California disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Typical
Cynthia Mates, MD - brand share 23.0%
Dermatology Physician average
23% brand-name claims vs 77% generic, on 774 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.
774
Total Claims
$321K
Total Drug Cost
247
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 865.7
- Total Day Supply
- 23,850
- Brand vs Generic
- 23% brand / 77% generic
- Brand Drug Cost
- $300K
- Generic Drug Cost
- $21K
- Antibiotic Claims
- 33
Patient Demographics
- Average Patient Age
- 75.2 years
- Avg HCC Risk Score
- 1.02
- Gender Split
- 60% female / 40% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Cynthia Mates, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Fluorouracil
Fluorouracil
77 claims
- Fluocinonide
Fluocinonide
65 claims
- Clobetasol Propion…
Clobetasol Propionate
62 claims
- Hydrocortisone
Hydrocortisone
52 claims
- Retin-A
Retin-A
50 claims
- Triamcinolone Acet…
Triamcinolone Acetonide
39 claims
- Calcipotriene
Calcipotriene
36 claims
- Metronidazole
Metronidazole
32 claims
| Drug | Claims |
|---|---|
| Fluorouracil | 77 |
| Fluocinonide | 65 |
| Clobetasol Propionate | 62 |
| Hydrocortisone | 52 |
| Retin-A Tretinoin | 50 |
| Triamcinolone Acetonide | 39 |
| Calcipotriene | 36 |
| Metronidazole | 32 |
| Cosentyx Sensoready (2 Pens) Secukinumab | 29 |
| Enbrel Sureclick Etanercept | 23 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Dermatology Physician Overview
How Cynthia Mates, MD fits within the Dermatology Physician landscape nationally.
15,011
Dermatology Physician Providers in US
53
States with Dermatology Physician
799
Avg Claims per Provider
Cynthia Mates, MD's 774 claims are below the specialty average of 799.
Nationwide Dermatology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Mates, both outside California 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 Dermatology Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Mates.
One of 2,004 Dermatology Physician providers enrolled in California, 5 are shown here.
Dr. Sumaira Aasi
MD
Stanford, CA
Dr. Christopher Abbott
M.D.
San Diego, CA
Dr. Eman Abdallah
D.O.
Los Angeles, CA
Dr. Farah Abdulla
MD
Duarte, CA
Dr. Sayyida Abdus-Salaam
M.D.
Daly City, CA
Compare Dermatology Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Cynthia Mates, MD's specialty? ▼
Cynthia Mates, MD specializes in Dermatology Physician and practices in Martinez, California. Credentials: MD.
How much does Cynthia Mates, MD prescribe under Medicare Part D? ▼
In 2024, Cynthia Mates, MD wrote 774 Medicare Part D claims totaling $321K in drug costs for 247 beneficiaries.
Where is Cynthia Mates, MD located? ▼
Cynthia Mates, MD is located at 200 MUIR RD, Martinez, CA, 94553. Phone: (925) 372-1000.
What is Cynthia Mates, MD's NPI number? ▼
Cynthia Mates, MD's National Provider Identifier (NPI) is 1679645329, issued on 11/15/2006.
Does Cynthia Mates, MD prescribe more brand-name or generic drugs? ▼
Cynthia Mates, MD's prescribing is 23% brand-name and 77% generic drugs by claim count, with $300K in brand drug costs.
How many Dermatology Physician providers are there in the US? ▼
There are 15,011 Dermatology Physician providers across 53 states in the US. The average Dermatology Physician provider writes 799 Medicare Part D claims per year.
What drugs does Cynthia Mates, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, Cynthia Mates, MD's most frequently prescribed drugs include Fluorouracil, Fluocinonide, Clobetasol Propionate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Cynthia Mates, MD accept Medicare? ▼
Cynthia Mates, MD appears in CMS Medicare data with 774 Part D claims and 247 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Cynthia Mates, MD's credentials? ▼
Cynthia Mates, MD's NPI is 1679645329 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 (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.