Ammar Charestan, M.D.
Family Medicine Physician · San Diego, CA
Ammar Charestan, M.D. is a family medicine physician with a practice address in San Diego, California, and NPI 1295181543, issued on May 5, 2016. Check the license (California A166970, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Ammar Charestan
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License numbers
- A166970 CA
4301500313 MI
Self-reported in NPPES; status is on the state search - Practice location
- 300 Fir St FL 1, San Diego, CA 92101
- Phone
- (619) 446-1575
- Enumerated
- May 5, 2016
- Record last updated
- Aug 13, 2024
- Medicare enrollment
- Enrolled (PECOS I20201229002769); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 300 Fir St FL 1
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Stephanie Yen, MDEmergency Medicine Physician1699154237
Verify Ammar Charestan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A166970Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average family medicine physician in 2024
136 Medicare Part D claims for 98 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D.
Most prescribed
- Amoxicillin-Clavulanate Potass19 claims
- Albuterol Sulfate Hfa14 claims
- Cephalexin13 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): 73.6 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 3 group practices
- East County Urgent Care Industrial And Medical Clinic IncEl Cajon, CA
- Neighborhood HealthcareEscondido, CA
- Sac Health SystemSan Bernardino, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ammar Charestan among 17,133 family medicine physician records in California
Ammar Charestan, M.D. 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 2016, is newer than 76% of them.
- NPI issued2016 · 76% of these records are older, 21% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2010 · median 2005 among the 10,652 with a school on file
- Record last updated2024 · 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).
780 family medicine physician records list a practice address in San Diego
They are 780 of the 52,937 NPPES records with a practice address in San Diego, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in San Diego → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Ian Brickl, MDSan Diego, CA 921011396721080
- John Carey, D.O.San Diego, CA 921011801893672
- Ulysses Carino, M.D.San Diego, CA 921011265441596
- Foster Carr, M.D.San Diego, CA 921011194835918
- Guillermo Castillo, M.D.San Diego, CA 921011366558322
- Habib Dalhoumi, M.D.San Diego, CA 921011275533465
- Christopher Fernandez Del Riego, M.D.San Diego, CA 921011063446763
- Robert Houghton, M.D.San Diego, CA 921011124138045
Common questions
What is Ammar Charestan, M.D.'s NPI number?
Ammar Charestan, M.D.'s National Provider Identifier (NPI) is 1295181543, issued on May 5, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Ammar Charestan, M.D. located?
The NPPES record lists a practice address at 300 Fir St FL 1, San Diego, CA, 92101. Phone: (619) 446-1575. Providers update this record themselves, so call before visiting.
How can I verify Ammar Charestan, M.D.'s license?
NPPES lists California license number A166970, 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 Ammar Charestan, M.D. prescribe under Medicare Part D?
In 2024, Ammar Charestan, M.D. had 136 Medicare Part D claims for 98 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
What is Ammar Charestan, M.D.'s MIPS final score?
The 2023 MIPS final score is 73.6 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.