Gary D. Guo, M.D.
Hospitalist Physician · West Covina, CA
Gary D. Guo, M.D. is a hospitalist physician with a practice address in West Covina, California, and NPI 1144573288, issued on Oct 25, 2012. Check the license (California A116079, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Gary D. Guo
- Credential
- M.D.
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License number
- A116079 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1115 S Sunset Ave, West Covina, CA 91790
- Phone
- (626) 962-4011
- Enumerated
- Oct 25, 2012
- Record last updated
- Jul 19, 2017 (not updated in 9 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20130211000066); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 3,099 in California → Look up another NPI →
Also registered at 1115 S Sunset Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Dijla AlsaighStudent in an Organized Health Care Education/Training Program1700427259
- Reannen ArevaloEmergency Registered Nurse1902788334
- Cara Baker, MDAnesthesiology Physician1063660462
- Vincent BalitonEmergency Registered Nurse1578139408
- Noel Benedict Bautista, MDStudent in an Organized Health Care Education/Training Program1972436376
- Gilbert Benitez, PAEmergency Medicine Physician1184678245
Verify Gary D. Guo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A116079Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
51% fewer Medicare Part D claims than the average hospitalist physician in 2024
253 Medicare Part D claims for 111 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D.
Most prescribed
- Amoxicillin-Clavulanate Potass27 claims
- Eliquis13 claims
- Doxycycline Monohydrate12 claims
- Furosemide12 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): 81.9 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: $29.77
3 payments; by number, the most common kind was food and beverage; the largest payer was Zoll Services LLC (a/k/a Zoll LifeCor Corp). The 7,324 providers of this specialty with any payment received $494.84 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 3 group practices
- Arcadia Hospitalist Medical Group IncArcadia, CA
- Pih Health PhysiciansLos Angeles, CA
- Southern California Hospitalist Network Medical Group IncOrange, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gary D. Guo among 3,099 hospitalist physician records in California
Gary D. Guo, M.D. is one of 3,099 hospitalist physician records with a practice address in California. 90% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 51% of them.
- NPI issued2012 · 51% of these records are older, 44% newer
- In a Medicare fileYes · 90% of these records are
- In the CMS Doctors and Clinicians fileYes · 81% of these records are
- Graduated1996 · median 2010 among the 2,505 with a school on file
- Record last updated2017 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hospitalist Physician providers in California
There are 3,099 hospitalist physician records in California.
All 3,099 in California → Every provider in West Covina → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Anildeep Gill, DOWest Covina, CA 917901265099642
- Sara Khan, MDUpland, CA 917861033253414
- Bilal Rayes, MDUpland, CA 917861619095841
- Lide Liu, M.D.Alhambra, CA 918011972719557
- Narine Argishti, MDPomona, CA 917671396186565
- Mehdi Baig, M.D.Pomona, CA 917671417524034
- Ronald Chang, M.D.Pomona, CA 917671861810863
- Zay Yar Htay, M. D , M.B.B. SPomona, CA 917671811395965
Common questions
What is Gary D. Guo, M.D.'s NPI number?
Gary D. Guo, M.D.'s National Provider Identifier (NPI) is 1144573288, issued on Oct 25, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Gary D. Guo, M.D. located?
The NPPES record lists a practice address at 1115 S Sunset Ave, West Covina, CA, 91790. Phone: (626) 962-4011. Providers update this record themselves, so call before visiting.
How can I verify Gary D. Guo, M.D.'s license?
NPPES lists California license number A116079, 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 Gary D. Guo, M.D. prescribe under Medicare Part D?
In 2024, Gary D. Guo, M.D. had 253 Medicare Part D claims for 111 beneficiaries; the average among hospitalist physician prescribers was 521. Part D covers Medicare prescriptions only.
What is Gary D. Guo, M.D.'s MIPS final score?
The 2023 MIPS final score is 81.9 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.