John Frederick Riedel, MD
Ophthalmology Physician · Walnut Creek, CA
John Frederick Riedel, MD is an ophthalmology physician with a practice address in Walnut Creek, California, and NPI 1205892825, issued on Apr 22, 2006. Check the license (California 00A239850, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- John Frederick Riedel
- Credential
- MD
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License number
- 00A239850 CA
Self-reported in NPPES; status is on the state search - Practice location
- 112 LA Casa Via, Walnut Creek, CA 94598
- Phone
- (925) 934-6300
- Enumerated
- Apr 22, 2006
- Record last updated
- Jul 16, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (925) 933-9547
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 2,899 in California → Look up another NPI →
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Verify John Frederick Riedel in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 00A239850Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
John Frederick Riedel among 2,899 ophthalmology physician records in California
John Frederick Riedel, MD is one of 2,899 ophthalmology physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 9% of them.
- NPI issued2006 · 9% of these records are older, 45% newer
- In a Medicare fileNo · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 66% of these records are
- Record last updated2007 · 67% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207W00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Ophthalmology Physician providers in California
There are 2,899 ophthalmology physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 2,899 in California → Every provider in Walnut Creek → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- David Demartini, M.D.Walnut Creek, CA 945981437134855
- James Dowling, M.D.Walnut Creek, CA 945981891757506
- Vahid Feiz, M.D.Walnut Creek, CA 945981083698732
- David Gilbert, MDWalnut Creek, CA 945981033297536
- Jenny Jacq, MDWalnut Creek, CA 945981477508927
- Ethan Kutzscher, MDWalnut Creek, CA 945981700881661
- Michelle Nee, MDWalnut Creek, CA 945981093893182
- Stephanie Po, MDWalnut Creek, CA 945981003994187
Common questions
What is John Frederick Riedel, MD's NPI number?
John Frederick Riedel, MD's National Provider Identifier (NPI) is 1205892825, issued on Apr 22, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Frederick Riedel, MD located?
The NPPES record lists a practice address at 112 LA Casa Via, Walnut Creek, CA, 94598. Phone: (925) 934-6300. Providers update this record themselves, so call before visiting.
How can I verify John Frederick Riedel, MD's license?
NPPES lists California license number 00A239850, 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. 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.