Fiona Yuen, M.D.
Endocrinology, Diabetes & Metabolism Physician · Walnut Creek, CA
Fiona Yuen, M.D. is an endocrinology, diabetes & metabolism physician with a practice address in Walnut Creek, California, and NPI 1649513599, issued on Mar 28, 2013. Check the license (California A133721, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Fiona Yuen
- Credential
- M.D.
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License number
- A133721 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1450 Treat Blvd # 200, Walnut Creek, CA 94597
- Phone
- (925) 296-9702
- Enumerated
- Mar 28, 2013
- Record last updated
- Nov 20, 2023
- Medicare enrollment
- Enrolled (PECOS I20220706000526); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 1,131 in California → Look up another NPI →
Also registered at 1450 Treat Blvd # 200
A shared address usually means a shared clinic or building; it does not show who employs whom.
- John Dana, M.D.Physical Medicine & Rehabilitation Physician1114091105
- Jessica Johns, M.D.Obstetrics & Gynecology Physician1841634342
- Rose Monardo, M.D.Gynecology Physician1407142250
- Melissa Owens, M.D.Hospitalist Physician1568607414
- Raul Romea, MDRheumatology Physician1962408112
- Monica WeiRheumatology Physician1417450214
Verify Fiona Yuen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A133721Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
76% more Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
4,624 Medicare Part D claims for 653 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 44% of claims.
Most prescribed
- Levothyroxine Sodium442 claims
- Ozempic343 claims
- Metformin Hcl Er208 claims
- Lantus Solostar207 claims
- Alendronate Sodium191 claims
- Jardiance179 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): 85.7 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: $1,597.43
59 payments; by number, the most common kind was food and beverage; the largest payer was Amgen Inc. The 5,661 providers of this specialty with any payment received $5,742.15 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
- John Muir Physician NetworkWalnut Creek, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Fiona Yuen among 1,131 endocrinology, diabetes & metabolism physician records in California
Fiona Yuen, M.D. is one of 1,131 endocrinology, diabetes & metabolism physician records with a practice address in California. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 77% of them.
- NPI issued2013 · 77% of these records are older, 20% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2013 · median 2003 among the 779 with a school on file
- Record last updated2023 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in California
There are 1,131 endocrinology, diabetes & metabolism physician records in California.
All 1,131 in California → Every provider in Walnut Creek → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Bonnie Kimmel, M.D.Walnut Creek, CA 945971508830944
- Audrey Arzamendi, M.D.Walnut Creek, CA 945981508159567
- Mark Christiansen, MDWalnut Creek, CA 945981821108218
- John Citron, MDWalnut Creek, CA 945961760560890
- Ali Hamraz, MDWalnut Creek, CA 945981083901961
- Richard Kamrath, M.D.Walnut Creek, CA 945981740226919
- Pamela Kershner, MDWalnut Creek, CA 945961841378924
- Mark Klebanov, M.D.Walnut Creek, CA 945981861572703
Common questions
What is Fiona Yuen, M.D.'s NPI number?
Fiona Yuen, M.D.'s National Provider Identifier (NPI) is 1649513599, issued on Mar 28, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Fiona Yuen, M.D. located?
The NPPES record lists a practice address at 1450 Treat Blvd # 200, Walnut Creek, CA, 94597. Phone: (925) 296-9702. Providers update this record themselves, so call before visiting.
How can I verify Fiona Yuen, M.D.'s license?
NPPES lists California license number A133721, 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 Fiona Yuen, M.D. prescribe under Medicare Part D?
In 2024, Fiona Yuen, M.D. had 4,624 Medicare Part D claims for 653 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. Part D covers Medicare prescriptions only.
What is Fiona Yuen, M.D.'s MIPS final score?
The 2023 MIPS final score is 85.7 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.