John W. Pyne, MD
Gastroenterology Physician · Riverside, CA
John W. Pyne, MD is a gastroenterology physician with a practice address in Riverside, California, and NPI 1679640536, issued on Nov 29, 2006. Check the license (California G74301, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- John W. Pyne
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- G74301 CA
Self-reported in NPPES; status is on the state search - Practice location
- 10800 Magnolia Ave, Riverside, CA 92505
- Phone
- (909) 353-2000
- Enumerated
- Nov 29, 2006
- Record last updated
- Nov 29, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20050223000607); accepts Medicare assignment
- Medical or professional school
- Medical College Of Pennsylvania, 1990
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 2,140 in California → Look up another NPI →
Also registered at 10800 Magnolia Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Michael Aguinaldo, M.D.Pediatrics Physician1851531487
- Maria Aguirre, MDPediatrics Physician1295806255
Verify John W. Pyne in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G74301Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
5% more Medicare Part D claims than the average gastroenterology physician in 2024
853 Medicare Part D claims for 416 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims.
Most prescribed
- Gavilyte-C291 claims
- Omeprazole90 claims
- Pantoprazole Sodium61 claims
- Lubiprostone46 claims
- Famotidine36 claims
- Linzess31 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
- Southern California Permanente Medical GroupRiverside, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John W. Pyne among 2,140 gastroenterology physician records in California
John W. Pyne, MD is one of 2,140 gastroenterology physician records with a practice address in California. 83% 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 7% of them.
- NPI issued2006 · 7% of these records are older, 48% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated1990 · median 2002 among the 1,538 with a school on file
- Record last updated2021 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in California
There are 2,140 gastroenterology physician records in California.
All 2,140 in California → Every provider in Riverside → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Charles Chaya, M.D.Riverside, CA 925051760438873
- Adam Chen, MDRiverside, CA 925051821160300
- James Ma, MDRiverside, CA 925051295802007
- Roger Sayegh, MDRiverside, CA 925051306917281
- Eiei Soe, M.D.Riverside, CA 925051780996751
- James Wang, MDRiverside, CA 925051558438762
- Robert Wen, MDRiverside, CA 925051790852507
- Eric Choi, M.D.Riverside, CA 925061841406568
Common questions
What is John W. Pyne, MD's NPI number?
John W. Pyne, MD's National Provider Identifier (NPI) is 1679640536, issued on Nov 29, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John W. Pyne, MD located?
The NPPES record lists a practice address at 10800 Magnolia Ave, Riverside, CA, 92505. Phone: (909) 353-2000. Providers update this record themselves, so call before visiting.
How can I verify John W. Pyne, MD's license?
NPPES lists California license number G74301, 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 W. Pyne, MD prescribe under Medicare Part D?
In 2024, John W. Pyne, MD had 853 Medicare Part D claims for 416 beneficiaries; the average among gastroenterology physician prescribers was 811. 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.