Uyen-Chi N. Huynh, M.D.
Internal Medicine Physician · Walnut Creek, CA
Uyen-Chi N. Huynh, M.D. is an internal medicine physician with a practice address in Walnut Creek, California, and NPI 1205271335, issued on May 2, 2013. Check the license (California A138368, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Uyen-Chi N. Huynh
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A138368 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1220 Rossmoor Parkway, Walnut Creek, CA 94595
- Phone
- (925) 947-3312
- Enumerated
- May 2, 2013
- Record last updated
- Dec 19, 2025
- Fax
- (925) 947-3396
- Medicare enrollment
- Enrolled (PECOS I20160913002487); accepts Medicare assignment
- Entity
- Type 1 · individual
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Also registered at 1220 Rossmoor Parkway
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Uyen-Chi N. Huynh in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A138368Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
36% more Medicare Part D claims than the average internal medicine physician in 2024
4,315 Medicare Part D claims for 231 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 208 claims were for opioids.
Most prescribed
- Amlodipine Besylate235 claims
- Gabapentin167 claims
- Atorvastatin Calcium140 claims
- Levothyroxine Sodium138 claims
- Eliquis113 claims
- Furosemide111 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).
Bills Medicare through one group practice
- John Muir Physician NetworkConcord, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Uyen-Chi N. Huynh among 17,696 internal medicine physician records in California
Uyen-Chi N. Huynh, M.D. is one of 17,696 internal medicine physician records with a practice address in California. 79% 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 71% of them.
- NPI issued2013 · 71% of these records are older, 26% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2013 · median 2004 among the 11,065 with a school on file
- Record last updated2025 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
183 internal medicine physician records list a practice address in Walnut Creek
They are 183 of the 6,170 NPPES records with a practice address in Walnut Creek, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Walnut Creek → Internal Medicine Physician nationwide →
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Common questions
What is Uyen-Chi N. Huynh, M.D.'s NPI number?
Uyen-Chi N. Huynh, M.D.'s National Provider Identifier (NPI) is 1205271335, issued on May 2, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Uyen-Chi N. Huynh, M.D. located?
The NPPES record lists a practice address at 1220 Rossmoor Parkway, Walnut Creek, CA, 94595. Phone: (925) 947-3312. Providers update this record themselves, so call before visiting.
How can I verify Uyen-Chi N. Huynh, M.D.'s license?
NPPES lists California license number A138368, 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 Uyen-Chi N. Huynh, M.D. prescribe under Medicare Part D?
In 2024, Uyen-Chi N. Huynh, M.D. had 4,315 Medicare Part D claims for 231 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Uyen-Chi N. Huynh, 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.