Michael D. Trifiro, MD
Obstetrics & Gynecology Physician · Sacramento, CA
Michael D. Trifiro, MD is an obstetrics & gynecology physician with a practice address in Sacramento, California, and NPI 1396979688, issued on May 14, 2009. Check the license (California A115042, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Michael D. Trifiro
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- A115042 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4860 Y St Ste 2500, Sacramento, CA 95817
- Phone
- (916) 734-7992
- Enumerated
- May 14, 2009
- Record last updated
- Aug 22, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (916) 734-6666
- Medicare enrollment
- Enrolled (PECOS I20130612000008); accepts Medicare assignment
- Medical or professional school
- University Of California, San Diego School Of Medicine, 2009
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 5,088 in California → Look up another NPI →
Also registered at 4860 Y St Ste 2500
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Nicole Ahmadi, MDObstetrics & Gynecology Physician1639759590
- Maryam Ali, MDStudent in an Organized Health Care Education/Training Program1003675430
- Sophia Alvarado, MDStudent in an Organized Health Care Education/Training Program1124887641
- Magdalena AnchondoStudent in an Organized Health Care Education/Training Program1780318196
- Alice Barr, MDGynecologic Oncology Physician1982109286
- Sloane Brazina, MDStudent in an Organized Health Care Education/Training Program1912588153
Verify Michael D. Trifiro in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A115042Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
39% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
100 Medicare Part D claims for 29 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 23% of claims.
Most prescribed
- Estradiol28 claims
- Estradiol (Once Weekly)11 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 2 group practices
- Regents OF The Univ OF CASacramento, CA
- Regents OF The University OF CaliforniaFolsom, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michael D. Trifiro among 5,088 obstetrics & gynecology physician records in California
Michael D. Trifiro, MD 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 2009, is newer than 66% of them.
- NPI issued2009 · 66% of these records are older, 30% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated2009 · median 2004 among the 2,700 with a school on file
- Record last updated2016 · 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 Sacramento → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Catherine Cansino, MDSacramento, CA 958171720039936
- Laurel Finta, M.D.Sacramento, CA 958171063497808
- Douglas Gillott, M.D.Sacramento, CA 958171295779858
- Richard Graves, M.D.Sacramento, CA 958171386626489
- Toni Harris, M.D.Sacramento, CA 958171457334989
- Sara Koehler, M.D.Sacramento, CA 958171790752343
- Albert Liu, MDSacramento, CA 958171407840705
- Carey Moreno-Hunt, M.D.Sacramento, CA 958171508833237
Common questions
What is Michael D. Trifiro, MD's NPI number?
Michael D. Trifiro, MD's National Provider Identifier (NPI) is 1396979688, issued on May 14, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Michael D. Trifiro, MD located?
The NPPES record lists a practice address at 4860 Y St Ste 2500, Sacramento, CA, 95817. Phone: (916) 734-7992. Providers update this record themselves, so call before visiting.
How can I verify Michael D. Trifiro, MD's license?
NPPES lists California license number A115042, 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 Michael D. Trifiro, MD prescribe under Medicare Part D?
In 2024, Michael D. Trifiro, MD had 100 Medicare Part D claims for 29 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. 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.