Karen Michelle Uy-Uyan Guiang, D.O.
Infectious Disease Physician · Claremont, CA
Karen Michelle Uy-Uyan Guiang, D.O. is an infectious disease physician with a practice address in Claremont, California, and NPI 1871738344, issued on Dec 11, 2008. Check the license (California 20A10579, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Karen Michelle Uy-Uyan Guiang
- Credential
- D.O.
- Primary taxonomy
- Infectious Disease Physician 207RI0200X
- License number
- 20A10579 CA
Self-reported in NPPES; status is on the state search - Practice location
- 935 W Foothill Blvd, Claremont, CA 91711
- Phone
- (626) 851-8880
- Enumerated
- Dec 11, 2008
- Record last updated
- Apr 29, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (626) 851-8001
- Medicaid IDs
- GR0059520 CA
20A10579 CA - Medicare enrollment
- Enrolled (PECOS I20121109000205); accepts Medicare assignment
- Medical or professional school
- College Of Osteo Med Of The Pacific At Pomona, 2007
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest infectious disease physician records → All 1,119 in California → Look up another NPI →
Also registered at 935 W Foothill Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sohanjeet Bassi, MDInfectious Disease Physician1609850635
- Nasima Begum, MDInfectious Disease Physician1578547519
- Deepthi Jayasekara, MDInfectious Disease Physician1366426306
- Hua Jiang, MDInfectious Disease Physician1821072844
- Katrina Anne Sandejas, MDInfectious Disease Physician1992333538
Verify Karen Michelle Uy-Uyan Guiang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A10579Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2% fewer Medicare Part D claims than the average infectious disease physician in 2024
677 Medicare Part D claims for 207 beneficiaries, against an average of 689 among the 7,388 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims.
Most prescribed
- Vancomycin Hcl78 claims
- Ceftriaxone62 claims
- Daptomycin52 claims
- Cefepime Hcl44 claims
- Ertapenem44 claims
- Amoxicillin-Clavulanate Potass37 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 MIPS final score for 2023 (Medicare payment program): 36.2 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $1,051.85
54 payments; by number, the most common kind was food and beverage; the largest payer was Gilead Sciences, Inc. The 3,895 providers of this specialty with any payment received $4,362.19 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
- Streng Bassi Begum And Jiang Medical CorporationClaremont, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Karen Michelle Uy-Uyan Guiang among 1,119 infectious disease physician records in California
Karen Michelle Uy-Uyan Guiang, D.O. is one of 1,119 infectious disease 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 2008, is newer than 59% of them.
- NPI issued2008 · 59% of these records are older, 34% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2007 · median 2003 among the 735 with a school on file
- Record last updated2020 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RI0200X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Infectious Disease Physician providers in California
There are 1,119 infectious disease physician records in California.
All 1,119 in California → Every provider in Claremont → Infectious Disease Physician nationwide →
The 8 infectious disease physician records with the nearest ZIP codes
- Sohanjeet Bassi, MDClaremont, CA 917111609850635
- Nasima Begum, MDClaremont, CA 917111578547519
- Deepthi Jayasekara, MDClaremont, CA 917111366426306
- Hua Jiang, MDClaremont, CA 917111821072844
- Katrina Anne Sandejas, MDClaremont, CA 917111992333538
- Manie Beheshti, M.D.Baldwin Park, CA 917061891884904
- Gary Bluestone, DOBaldwin Park, CA 917061639227614
- Rosalina See-Prats, M.D.Baldwin Park, CA 917061407865595
Common questions
What is Karen Michelle Uy-Uyan Guiang, D.O.'s NPI number?
Karen Michelle Uy-Uyan Guiang, D.O.'s National Provider Identifier (NPI) is 1871738344, issued on Dec 11, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Karen Michelle Uy-Uyan Guiang, D.O. located?
The NPPES record lists a practice address at 935 W Foothill Blvd, Claremont, CA, 91711. Phone: (626) 851-8880. Providers update this record themselves, so call before visiting.
How can I verify Karen Michelle Uy-Uyan Guiang, D.O.'s license?
NPPES lists California license number 20A10579, 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 Karen Michelle Uy-Uyan Guiang, D.O. prescribe under Medicare Part D?
In 2024, Karen Michelle Uy-Uyan Guiang, D.O. had 677 Medicare Part D claims for 207 beneficiaries; the average among infectious disease physician prescribers was 689. Part D covers Medicare prescriptions only.
What is Karen Michelle Uy-Uyan Guiang, D.O.'s MIPS final score?
The 2023 MIPS final score is 36.2 of 100. 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.