Gerardo Reyes Guba, MD
Family Medicine Physician · Monrovia, CA
Gerardo Reyes Guba, MD is a family medicine physician with a practice address in Monrovia, California, and NPI 1164402632, issued on Jan 19, 2006. Check the license (California A65337, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Gerardo Reyes Guba
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- A65337 CA
Self-reported in NPPES; status is on the state search - Practice location
- 831 E Huntington Dr, Monrovia, CA 91016
- Phone
- (626) 358-0269
- Enumerated
- Jan 19, 2006
- Record last updated
- Dec 16, 2025
- Medicare enrollment
- Enrolled (PECOS I20100825000312); accepts Medicare assignment
- Medical or professional school
- University Of California, Irvine, California College Of Medicine, 1996
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 831 E Huntington Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Gerardo Reyes Guba in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A65337Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.4 times the Medicare Part D claims of the average family medicine physician in 2024
8,459 Medicare Part D claims for 689 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 45 claims were for opioids.
Most prescribed
- Atorvastatin Calcium680 claims
- Amlodipine Besylate516 claims
- Lisinopril296 claims
- Levothyroxine Sodium295 claims
- Metformin Hcl286 claims
- Losartan Potassium285 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
- Healthcare Partners Affiliates Medical GroupAnaheim, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gerardo Reyes Guba among 17,133 family medicine physician records in California
Gerardo Reyes Guba, MD is one of 17,133 family medicine 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, 59% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1996 · median 2005 among the 10,652 with a school on file
- Record last updated2025 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Family Medicine Physician providers in California
There are 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Monrovia → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Donald Balacuit, DOMonrovia, CA 910161598737116
- Lorraine Cheng, MDMonrovia, CA 910161912199696
- Louis Ho, D.O.Monrovia, CA 910161629375431
- Daisha Ortega, MDMonrovia, CA 910161356905954
- Reena Patel, M.D.Monrovia, CA 910161194958256
- Zaw Ye, MDMonrovia, CA 910161144886599
- Arbi Ghazarian, M.D.Montrose, CA 910201992773253
- Steven Kamajian, D.OMontrose, CA 910201295703320
Common questions
What is Gerardo Reyes Guba, MD's NPI number?
Gerardo Reyes Guba, MD's National Provider Identifier (NPI) is 1164402632, issued on Jan 19, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gerardo Reyes Guba, MD located?
The NPPES record lists a practice address at 831 E Huntington Dr, Monrovia, CA, 91016. Phone: (626) 358-0269. Providers update this record themselves, so call before visiting.
How can I verify Gerardo Reyes Guba, MD's license?
NPPES lists California license number A65337, 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 Gerardo Reyes Guba, MD prescribe under Medicare Part D?
In 2024, Gerardo Reyes Guba, MD had 8,459 Medicare Part D claims for 689 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.