Kenneth E. Grubbs, D.O.
Family Medicine Physician · Orange, CA
Kenneth E. Grubbs, D.O. is a family medicine physician with a practice address in Orange, California, and NPI 1588773295, issued on Aug 29, 2006. Check the license (California 20A6349, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Kenneth E. Grubbs
- Credential
- D.O.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 20A6349 CA
Self-reported in NPPES; status is on the state search - Practice location
- 867 S Tustin St, Orange, CA 92866
- Phone
- (714) 771-1420
- Enumerated
- Aug 29, 2006
- Record last updated
- Mar 4, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (714) 771-6918
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 867 S Tustin St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Neil ChenPhysician Assistant1710615398
- John Diab, PAPhysician Assistant1164687570
- Maryann Nuesse, D.O.Adult Medicine Physician1689633455
- William Nuesse, M.D.Adult Medicine Physician1952360729
- Simon Stephen Yao, NPFamily Nurse Practitioner1275244774
- Frank Young, M.D.General Practice Physician1447432620
Verify Kenneth E. Grubbs in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A6349Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
56% fewer Medicare Part D claims than the average family medicine physician in 2024
1,575 Medicare Part D claims for 136 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. 65 claims were for opioids.
Most prescribed
- Atorvastatin Calcium125 claims
- Omeprazole74 claims
- Lisinopril70 claims
- Amlodipine Besylate69 claims
- Losartan Potassium65 claims
- Furosemide60 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: $39.91
2 payments; by number, the most common kind was food and beverage; the largest payer was Exact Sciences Corporation. 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.
Kenneth E. Grubbs among 17,133 family medicine physician records in California
Kenneth E. Grubbs, D.O. 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 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 59% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 62% of these records are
- Record last updated2014 · 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).
106 family medicine physician records list a practice address in Orange
They are 106 of the 13,245 NPPES records with a practice address in Orange, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Orange → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Annette Bernhut, D.O.Orange, CA 928661841367471
- Lawrence Ehrlich, DOOrange, CA 928661407854631
- Ana Fajardo, M.D.Orange, CA 928661154498798
- Alonzo Flores, MDOrange, CA 928661518013978
- Bryn Henderson, D.O.Orange, CA 928661447296694
- Emily Jackson, MD MPHOrange, CA 928661265572143
- Barry Marfleet, M.D.Orange, CA 928661659397792
- Neal Patel, D.O.Orange, CA 928661730543919
Common questions
What is Kenneth E. Grubbs, D.O.'s NPI number?
Kenneth E. Grubbs, D.O.'s National Provider Identifier (NPI) is 1588773295, issued on Aug 29, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Kenneth E. Grubbs, D.O. located?
The NPPES record lists a practice address at 867 S Tustin St, Orange, CA, 92866. Phone: (714) 771-1420. Providers update this record themselves, so call before visiting.
How can I verify Kenneth E. Grubbs, D.O.'s license?
NPPES lists California license number 20A6349, 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 Kenneth E. Grubbs, D.O. prescribe under Medicare Part D?
In 2024, Kenneth E. Grubbs, D.O. had 1,575 Medicare Part D claims for 136 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.