Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Dr. Matthew Tam Maynard, DO

Individual provider Obstetrics & Gynecology Physician · NPI 1861617417

Dr. Matthew Tam Maynard, DO practises Obstetrics/Gynecology in Sonora, California. Graduated from Arizona College of Osteopathic Medicine Mid Western University in 2002, 24 years ago. Practices with Sonora Community Hospital, a 136-clinician group and accepts Medicare assignment. Licensed in California, Michigan and New Mexico.

Years since qualifying
24
Trained at
Arizona College of Osteopathic Medicine Mid Western University
Licensed in
CA, MI, NM
In the registry since
2007
Specialties on file
3
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

20044 Cedar Rd N Ste A
Sonora, CA 95370-5900 Not confirmed with CMS for 17 years — call before visiting
Phone: (209) 536-3750
Fax: (209) 532-9811
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Obstetrics & Gynecology Physician (primary) Taxonomy 207V00000X · Licence 20A10864 (CA)
Obstetrics & Gynecology Physician Taxonomy 207V00000X · Licence 5101015815 (MI)
Obstetrics & Gynecology Physician Taxonomy 207V00000X · Licence T-521 (NM)

Record details

NPI number1861617417
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorYes
NPI enumeratedApril 16, 2007
Last updated in NPPESOctober 10, 2009

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyOBSTETRICS/GYNECOLOGY
Medical schoolARIZONA COLLEGE OF OSTEOPATHIC MEDICINE MID WESTERN UNIVERSITY
Graduated 2002 (24 years in practice)
Group practice Sonora Community Hospital — 136 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations6 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients104
Services billed 211 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $362 17 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

  • Adventist Health Sonora Hospital · Sonora, CA

Colleagues at Sonora Community Hospital

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 136 clinicians in the practice; 12 are shown here.

Other providers in Sonora