Stewart Mason, M.D.
Obstetrics & Gynecology Physician · Fresno, CA
Stewart Mason, M.D. is an obstetrics & gynecology physician with a practice address in Fresno, California, and NPI 1871519835, issued on Jul 14, 2006. Check the license (California A72105, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Stewart Mason
- Credential
- M.D.
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- A72105 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1374 E Alluvial Ave, Fresno, CA 93720
- Phone
- (559) 981-2600
- Enumerated
- Jul 14, 2006
- Record last updated
- Sep 18, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (559) 981-2610
- Medicaid ID
- 00A721050 CA
- Medicare enrollment
- Enrolled (PECOS I20050307000572); accepts Medicare assignment
- Medical or professional school
- Medical College Of Pennsylvania, 1998
- 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 1374 E Alluvial Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kelleen Bosch, DOObstetrics Physician1811105414
- Robert Curry, M.D.Obstetrics & Gynecology Physician1033205539
- Rebecca Donahue, FNP-CFamily Nurse Practitioner1326749003
- Amy Fide, FNP-CFamily Nurse Practitioner1891330999
- Sukhjit Gill, NP, CNMWomen's Health Nurse Practitioner1336966159
- Adanna Ikedilo, MD, FACOGObstetrics & Gynecology Physician1659554509
Verify Stewart Mason in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A72105Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
9% more Medicare Part D claims than the average obstetrics & gynecology physician in 2024
180 Medicare Part D claims for 74 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. 16 claims were for opioids.
Most prescribed
- Estradiol66 claims
- Oxycodone-Acetaminophen16 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): 85.8 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: $2,082.50
31 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
- Community Foundation Medical GroupFresno, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Stewart Mason among 5,088 obstetrics & gynecology physician records in California
Stewart Mason, M.D. 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 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 52% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated1998 · median 2004 among the 2,700 with a school on file
- Record last updated2013 · 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 Fresno → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Jaswant Chahal-Matharu, M.D.Fresno, CA 937201295842953
- Robert Curry, M.D.Fresno, CA 937201033205539
- Patricia Felton, MDFresno, CA 937201033174180
- Katherine Finney, MDFresno, CA 937201699739458
- Harold Grooms, M.D.Fresno, CA 937201205837192
- Daniel Hernandez, MDFresno, CA 937201487615449
- Thomas Kulterman, MDFresno, CA 937201851479760
- Joginder Matharu, M.D.Fresno, CA 937201750498408
Common questions
What is Stewart Mason, M.D.'s NPI number?
Stewart Mason, M.D.'s National Provider Identifier (NPI) is 1871519835, issued on Jul 14, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Stewart Mason, M.D. located?
The NPPES record lists a practice address at 1374 E Alluvial Ave, Fresno, CA, 93720. Phone: (559) 981-2600. Providers update this record themselves, so call before visiting.
How can I verify Stewart Mason, M.D.'s license?
NPPES lists California license number A72105, 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 Stewart Mason, M.D. prescribe under Medicare Part D?
In 2024, Stewart Mason, M.D. had 180 Medicare Part D claims for 74 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. Part D covers Medicare prescriptions only.
What is Stewart Mason, M.D.'s MIPS final score?
The 2023 MIPS final score is 85.8 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.