Matthew Tam Maynard, D.O.
Obstetrics & Gynecology Physician · Sonora, CA
Matthew Tam Maynard, D.O. is an obstetrics & gynecology physician with a practice address in Sonora, California, and NPI 1861617417, issued on Apr 16, 2007. Check the license (California 20A10864, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Matthew Tam Maynard
- Credential
- D.O.
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License numbers
- 20A10864 CA
5101015815 MI
T-521 NM
Self-reported in NPPES; status is on the state search - Practice location
- 20044 Cedar RD N Ste A, Sonora, CA 95370
- Phone
- (209) 536-3750
- Enumerated
- Apr 16, 2007
- Record last updated
- Oct 10, 2009 (not updated in 17 years: call before relying on the address or phone)
- Fax
- (209) 532-9811
- Medicare enrollment
- Enrolled (PECOS I20091211000329); accepts Medicare assignment
- Medical or professional school
- Arizona College Of Osteopathic Medicine Mid Western University, 2002
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 5,088 in California → Look up another NPI →
Verify Matthew Tam Maynard in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A10864Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.0 times the Medicare Part D claims of the average obstetrics & gynecology physician in 2024
335 Medicare Part D claims for 88 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 13 claims were for opioids.
Most prescribed
- Estradiol73 claims
- Oxybutynin Chloride Er31 claims
- Estradiol (Once Weekly)13 claims
- Premarin12 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 79.2 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $513.78
15 payments; by number, the most common kind was food and beverage; the largest payer was Intuitive Surgical, Inc. The 21,429 providers of this specialty with any payment received $1,030.61 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Sonora Community HospitalSonora, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Matthew Tam Maynard among 5,088 obstetrics & gynecology physician records in California
Matthew Tam Maynard, D.O. is one of 5,088 obstetrics & gynecology physician records with a practice address in California. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 48% of them.
- NPI issued2007 · 48% of these records are older, 38% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated2002 · median 2004 among the 2,700 with a school on file
- Record last updated2009 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Obstetrics & Gynecology Physician providers in California
There are 5,088 obstetrics & gynecology physician records in California.
All 5,088 in California → Every provider in Sonora → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Chrystal Bradley, M.D.Sonora, CA 953701366886392
- Lawrence Brunel, M.D. F.A.C.O.G.Sonora, CA 953701154351484
- Alexa Calfee, MD MPHSonora, CA 953701508108978
- Cicely Chen, M.D.Sonora, CA 953701043625916
- Christopher Jones, M.D.Sonora, CA 953701649594417
- Christopher Mills, MDSonora, CA 953701992897292
- Lawrence Podolsky, M.D.Riverbank, CA 953671356360184
- Susan Podolsky, M.DRiverbank, CA 953671013974815
Common questions
What is Matthew Tam Maynard, D.O.'s NPI number?
Matthew Tam Maynard, D.O.'s National Provider Identifier (NPI) is 1861617417, issued on Apr 16, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Matthew Tam Maynard, D.O. located?
The NPPES record lists a practice address at 20044 Cedar RD N Ste A, Sonora, CA, 95370. Phone: (209) 536-3750. Providers update this record themselves, so call before visiting.
How can I verify Matthew Tam Maynard, D.O.'s license?
NPPES lists California license number 20A10864, 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 Matthew Tam Maynard, D.O. prescribe under Medicare Part D?
In 2024, Matthew Tam Maynard, D.O. had 335 Medicare Part D claims for 88 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. Part D covers Medicare prescriptions only.
What is Matthew Tam Maynard, D.O.'s MIPS final score?
The 2023 MIPS final score is 79.2 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.