Frank Trieste Grassi
Critical Care Medicine (Internal Medicine) Physician · San Diego, CA
Frank Trieste Grassi is a critical care medicine (internal medicine) physician with a practice address in San Diego, California, and NPI 1659342624, issued on Jan 30, 2006. Check the license (California C52598, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Frank Trieste Grassi
- Primary taxonomy
- Critical Care Medicine (Internal Medicine) Physician 207RC0200X
- License number
- C52598 CA
Self-reported in NPPES; status is on the state search - Practice location
- 7901 Frost St, San Diego, CA 92123
- Phone
- (858) 939-3411
- Enumerated
- Jan 30, 2006
- Record last updated
- Mar 30, 2026
- Medicare enrollment
- Enrolled (PECOS I20070313000579); accepts Medicare assignment
- Medical or professional school
- Tulane University School Of Medicine, 1997
- Entity
- Type 1 · individual
8 nearest critical care medicine (internal medicine) physician records → All 723 in California → Look up another NPI →
Also registered at 7901 Frost St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Aileen Afshar, MDInternal Medicine Physician1134689946
- Saad Alkhider, MDInternal Medicine Physician1447712062
- Mustafa Alwash, M.DHospitalist Physician1679936439
- Alexandra Anjier, MDEmergency Medicine Physician1467087510
- Anna Astashchanka, MDPulmonary Disease Physician1821594359
- Amir Bahreman, M.D.Internal Medicine Physician1124249388
Verify Frank Trieste Grassi in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C52598Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through 2 group practices
- Chest Medicine And Critical Care Medical Group IncChula Vista, CA
- Emergency And Acute Care Medical CorporationSan Diego, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Frank Trieste Grassi among 723 critical care medicine (internal medicine) physician records in California
Frank Trieste Grassi is one of 723 critical care medicine (internal medicine) physician records with a practice address in California. 87% 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, 60% newer
- In a Medicare fileYes · 87% of these records are
- In the CMS Doctors and Clinicians fileYes · 77% of these records are
- Graduated1997 · median 2005 among the 559 with a school on file
- Record last updated2026 · 50% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0200X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Critical Care Medicine (Internal Medicine) Physician providers in California
There are 723 critical care medicine (internal medicine) physician records in California.
All 723 in California → Every provider in San Diego → Critical Care Medicine (Internal Medicine) Physician nationwide →
The 8 critical care medicine (internal medicine) physician records with the nearest ZIP codes
- Juan Deza, M.D.San Diego, CA 921231407846157
- William Fisher, M.D.San Diego, CA 921231245674001
- Thomas Lawrie, M.D.San Diego, CA 921231124020755
- David Shaw, MDSan Diego, CA 921231205829728
- Praveen Akuthota, M.D.San Diego, CA 921211396704698
- Daniel Crouch, MDSan Diego, CA 921211710182423
- Naveen Gupta, MDSan Diego, CA 921211013015569
- Omar Mesarwi, MDSan Diego, CA 921211245430032
Common questions
What is Frank Trieste Grassi's NPI number?
Frank Trieste Grassi's National Provider Identifier (NPI) is 1659342624, issued on Jan 30, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Frank Trieste Grassi located?
The NPPES record lists a practice address at 7901 Frost St, San Diego, CA, 92123. Phone: (858) 939-3411. Providers update this record themselves, so call before visiting.
How can I verify Frank Trieste Grassi's license?
NPPES lists California license number C52598, 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.
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.