Gretchen G. Webb-Kummer, M.D.
Family Medicine Physician · Oakdale, CA
Gretchen G. Webb-Kummer, M.D. is a family medicine physician with a practice address in Oakdale, California, and NPI 1356475347, issued on Mar 14, 2007. Check the license (California A94868, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Gretchen G. Webb-Kummer
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- A94868 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1425 West H St, Oakdale, CA 95361
- Phone
- (209) 848-1005
- Enumerated
- Mar 14, 2007
- Record last updated
- Feb 23, 2017 (not updated in 9 years: call before relying on the address or phone)
- Fax
- (209) 845-8918
- Medicare enrollment
- Enrolled (PECOS I20071003000786); accepts Medicare assignment
- Medical or professional school
- University Of California, Davis School Of Medicine, 2004
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Verify Gretchen G. Webb-Kummer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A94868Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.1 times the Medicare Part D claims of the average family medicine physician in 2024
7,442 Medicare Part D claims for 399 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 347 claims were for opioids.
Most prescribed
- Atorvastatin Calcium451 claims
- Levothyroxine Sodium334 claims
- Hydrocodone-Acetaminophen238 claims
- Amlodipine Besylate237 claims
- Gabapentin207 claims
- Losartan Potassium198 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: $223.93
13 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 55,478 providers of this specialty with any payment received $902.55 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.
Gretchen G. Webb-Kummer among 17,133 family medicine physician records in California
Gretchen G. Webb-Kummer, 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 2007, is newer than 41% of them.
- NPI issued2007 · 41% of these records are older, 47% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2004 · median 2005 among the 10,652 with a school on file
- Record last updated2017 · 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).
7 family medicine physician records list a practice address in Oakdale
They are 7 of the 207 NPPES records with a practice address in Oakdale, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Oakdale → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Bruce Blackhart, M.D.Oakdale, CA 953611700874286
- Mark Cook, M.D.Oakdale, CA 953611750379236
- David Fuller, M.D.Oakdale, CA 953611033149448
- Albert Gelders, M.D.Oakdale, CA 953611417945999
- Lee Horwitz, M.D.Oakdale, CA 953611922096411
- Kenneth Phenow, MD, MPHOakdale, CA 953611174144653
- Alessandra D'Avanzo, MDNewman, CA 953601962694208
- Divya Gangwar, M.D.Newman, CA 953601578795464
Common questions
What is Gretchen G. Webb-Kummer, M.D.'s NPI number?
Gretchen G. Webb-Kummer, M.D.'s National Provider Identifier (NPI) is 1356475347, issued on Mar 14, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Gretchen G. Webb-Kummer, M.D. located?
The NPPES record lists a practice address at 1425 West H St, Oakdale, CA, 95361. Phone: (209) 848-1005. Providers update this record themselves, so call before visiting.
How can I verify Gretchen G. Webb-Kummer, M.D.'s license?
NPPES lists California license number A94868, 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 Gretchen G. Webb-Kummer, M.D. prescribe under Medicare Part D?
In 2024, Gretchen G. Webb-Kummer, M.D. had 7,442 Medicare Part D claims for 399 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.