Katherine H.y. Nguyen, M.D.
Rheumatology Physician · San Diego, CA
Katherine H.y. Nguyen, M.D. is a rheumatology physician with a practice address in San Diego, California, and NPI 1356319875, issued on Mar 10, 2006. Check the license (California G079343, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Katherine H.y. Nguyen
- Credential
- M.D.
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License number
- G079343 CA
Self-reported in NPPES; status is on the state search - Practice location
- 200 W Arbor Dr, San Diego, CA 92103
- Phone
- (619) 543-6248
- Enumerated
- Mar 10, 2006
- Record last updated
- Jun 8, 2018 (not updated in 8 years: call before relying on the address or phone)
- Medicaid ID
- 00G793430 CA
- Medicare enrollment
- Enrolled (PECOS I20040204000513); accepts Medicare assignment
- Medical or professional school
- University Of California, San Diego School Of Medicine, 1992
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 926 in California → Look up another NPI →
Also registered at 200 W Arbor Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Benjamin Abbadessa, M.D.Colon & Rectal Surgery Physician1255593612
- Geraldine Abcede, RNCertified Registered Nurse Anesthetist1982384046
- Joseph Abdelmalek, M.DNephrology Physician1740485531
- Kristy AbelCertified Registered Nurse Anesthetist1962113035
- Paula Abeleda, NPFamily Nurse Practitioner1558945022
Verify Katherine H.y. Nguyen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G079343Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
11% more Medicare Part D claims than the average rheumatology physician in 2024
2,199 Medicare Part D claims for 279 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D. 68 claims were for opioids.
Most prescribed
- Hydroxychloroquine Sulfate315 claims
- Methotrexate224 claims
- Prednisone193 claims
- Leflunomide115 claims
- Gabapentin60 claims
- Tramadol Hcl51 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 one group practice
- Regents OF The University OF CaliforniaSan Diego, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Katherine H.y. Nguyen among 926 rheumatology physician records in California
Katherine H.y. Nguyen, M.D. is one of 926 rheumatology physician records with a practice address in California. 81% 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 6% of them.
- NPI issued2006 · 6% of these records are older, 55% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated1992 · median 2003 among the 641 with a school on file
- Record last updated2018 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RR0500X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Rheumatology Physician providers in California
There are 926 rheumatology physician records in California.
All 926 in California → Every provider in San Diego → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- Jeannie Chao, M.DSan Diego, CA 921031962600015
- Soo Choi, M.D.San Diego, CA 921031396997946
- Mary Corr, MDSan Diego, CA 921031255389417
- John Daly, M.D.San Diego, CA 921031831124502
- Mark Ginsberg, M.D.San Diego, CA 921031659396778
- Bonnie Hepburn, M.D.San Diego, CA 921031104972850
- Paul Hsu, PHDSan Diego, CA 921031457858631
- Doquyen Huynh, MDSan Diego, CA 921031619135241
Common questions
What is Katherine H.y. Nguyen, M.D.'s NPI number?
Katherine H.y. Nguyen, M.D.'s National Provider Identifier (NPI) is 1356319875, issued on Mar 10, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Katherine H.y. Nguyen, M.D. located?
The NPPES record lists a practice address at 200 W Arbor Dr, San Diego, CA, 92103. Phone: (619) 543-6248. Providers update this record themselves, so call before visiting.
How can I verify Katherine H.y. Nguyen, M.D.'s license?
NPPES lists California license number G079343, 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 Katherine H.y. Nguyen, M.D. prescribe under Medicare Part D?
In 2024, Katherine H.y. Nguyen, M.D. had 2,199 Medicare Part D claims for 279 beneficiaries; the average among rheumatology physician prescribers was 1,978. 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.