Cynthia S. Mates, MD
Dermatology Physician · Martinez, CA
Cynthia S. Mates, MD is a dermatology physician with a practice address in Martinez, California, and NPI 1679645329, issued on Nov 15, 2006. Check the license (California A91022, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Cynthia S. Mates
- Credential
- MD
- Primary taxonomy
- Dermatology Physician 207N00000X
- License number
- A91022 CA
Self-reported in NPPES; status is on the state search - Practice location
- 200 Muir RD, Martinez, CA 94553
- Phone
- (925) 372-1000
- Enumerated
- Nov 15, 2006
- Record last updated
- Jan 6, 2022
- Medicaid ID
- 00A910220 CA
- Medicare enrollment
- Enrolled (PECOS I20051201000812); accepts Medicare assignment
- Medical or professional school
- University Of California, Davis School Of Medicine, 1999
- Entity
- Type 1 · individual
8 nearest dermatology physician records → All 2,083 in California → Look up another NPI →
Also registered at 200 Muir RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Mona Ahmad, M.D.Physical Medicine & Rehabilitation Physician1881128510
- Eric Alexander, MDNeuromuscular Medicine (Physical Medicine & Rehabilitation) Physician1922180157
- Robert Anderson, MDInternal Medicine Physician1447338538
- May Antonio, PTPhysical Therapist1245553668
Verify Cynthia S. Mates in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A91022Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3% fewer Medicare Part D claims than the average dermatology physician in 2024
774 Medicare Part D claims for 247 beneficiaries, against an average of 797 among the 12,802 providers of this specialty who prescribed in Part D. Brand-name drugs were 23% of claims.
Most prescribed
- Fluorouracil77 claims
- Fluocinonide65 claims
- Clobetasol Propionate62 claims
- Hydrocortisone52 claims
- Retin-A50 claims
- Triamcinolone Acetonide39 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Permanente Medical Group IncRichmond, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Cynthia S. Mates among 2,083 dermatology physician records in California
Cynthia S. Mates, MD is one of 2,083 dermatology physician records with a practice address in California. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 56% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated1999 · median 2006 among the 1,450 with a school on file
- Record last updated2022 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207N00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Dermatology Physician providers in California
There are 2,083 dermatology physician records in California.
All 2,083 in California → Every provider in Martinez → Dermatology Physician nationwide →
The 8 dermatology physician records with the nearest ZIP codes
- Sherilyn Baughman, MDMartinez, CA 945531326108713
- Matthew Dizon, MDMartinez, CA 945531093248841
- Ross Jackson, MDMartinez, CA 945531871671958
- Barry Waldman, MDMartinez, CA 945531760560825
- Jennifer Lai, M.D.Livermore, CA 945501902069669
- Erlinda Fang, M.D.Lafayette, CA 945491265746788
- Kelly Hood, MDLafayette, CA 945491104865286
- Caroline Campbell, MDNapa, CA 945581538651385
Common questions
What is Cynthia S. Mates, MD's NPI number?
Cynthia S. Mates, MD's National Provider Identifier (NPI) is 1679645329, issued on Nov 15, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Cynthia S. Mates, MD located?
The NPPES record lists a practice address at 200 Muir RD, Martinez, CA, 94553. Phone: (925) 372-1000. Providers update this record themselves, so call before visiting.
How can I verify Cynthia S. Mates, MD's license?
NPPES lists California license number A91022, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Cynthia S. Mates, MD prescribe under Medicare Part D?
In 2024, Cynthia S. Mates, MD had 774 Medicare Part D claims for 247 beneficiaries; the average among dermatology physician prescribers was 797. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.