John Anthony Griffin, M.D.
Colon & Rectal Surgery Physician · Loma Linda, CA
John Anthony Griffin, M.D. is a colon & rectal surgery physician with a practice address in Loma Linda, California, and NPI 1821014903, issued on Jul 14, 2006. Check the license (California C202417, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- John Anthony Griffin
- Credential
- M.D.
- Primary taxonomy
- Colon & Rectal Surgery Physician 208C00000X
- License numbers
- C202417 CA
5306253-1205 UT
MD60664479 WA
Self-reported in NPPES; status is on the state search - Practice location
- 11370 Anderson St Ste 2100, Loma Linda, CA 92354
- Phone
- (909) 558-2822
- Enumerated
- Jul 14, 2006
- Record last updated
- Oct 21, 2025
- Medicare enrollment
- Enrolled (PECOS I20250619001171); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest colon & rectal surgery physician records → All 198 in California → Look up another NPI →
Also registered at 11370 Anderson St Ste 2100
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sherif Aly, M.D.Surgery Physician1679014849
- Colin Brown, M.D.Surgery Physician1780025114
- Jana Castillo, NPNurse Practitioner1093418287
- Baishakhi Choudhury, MDOtolaryngology Physician1316174733
- Christina ColosimoSurgical Critical Care Physician1730549684
- Quy Alan Dao, PAPhysician Assistant1770192536
Verify John Anthony Griffin in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C202417Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
16% more Medicare Part D claims than the average colon & rectal surgery physician in 2024
222 Medicare Part D claims for 116 beneficiaries, against an average of 192 among the 1,836 providers of this specialty who prescribed in Part D.
Most prescribed
- Sod Sulf-Potass Sulf-Mag Sulf69 claims
- Lidocaine-Prilocaine21 claims
- Neomycin Sulfate19 claims
- Metronidazole18 claims
- Ondansetron Hcl12 claims
- Peg-3350 And Electrolytes11 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.
Industry payments in 2024: $669.47
5 payments; by number, the most common kind was food and beverage; the largest payer was Stryker Corporation. The 1,524 providers of this specialty with any payment received $3,468.16 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
- Faculty Physicians And Surgeons OF LlusmLoma Linda, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Anthony Griffin among 198 colon & rectal surgery physician records in California
John Anthony Griffin, M.D. is one of 198 colon & rectal surgery 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 10% of them.
- NPI issued2006 · 10% of these records are older, 57% newer
- In a Medicare fileYes · 87% of these records are
- In the CMS Doctors and Clinicians fileYes · 75% of these records are
- Graduated1997 · median 2002 among the 149 with a school on file
- Record last updated2025 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208C00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Colon & Rectal Surgery Physician providers in California
There are 198 colon & rectal surgery physician records in California.
All 198 in California → Every provider in Loma Linda → Colon & Rectal Surgery Physician nationwide →
The 8 colon & rectal surgery physician records with the nearest ZIP codes
- David Row, M.D.Loma Linda, CA 923541871797118
- Allison Aka, MDLoma Linda, CA 923501891130100
- Justin Greco, MB BCH BAOLoma Linda, CA 923501376032888
- Ngoc Patrick Nguyen, MDFontana, CA 923351417153552
- Robert Yuhan, MDFontana, CA 923351144397969
- Matthew Whealon, MDColton, CA 923241902163710
- Scott Gering, MDRancho Mirage, CA 922701962495721
- Mohammed Iyoob Mohammed Ilyas, MDRancho Mirage, CA 922701902160195
Common questions
What is John Anthony Griffin, M.D.'s NPI number?
John Anthony Griffin, M.D.'s National Provider Identifier (NPI) is 1821014903, issued on Jul 14, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Anthony Griffin, M.D. located?
The NPPES record lists a practice address at 11370 Anderson St Ste 2100, Loma Linda, CA, 92354. Phone: (909) 558-2822. Providers update this record themselves, so call before visiting.
How can I verify John Anthony Griffin, M.D.'s license?
NPPES lists California license number C202417, 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 John Anthony Griffin, M.D. prescribe under Medicare Part D?
In 2024, John Anthony Griffin, M.D. had 222 Medicare Part D claims for 116 beneficiaries; the average among colon & rectal surgery physician prescribers was 192. 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.