Katherine Elizabeth Oakley, M.D.
General Practice Physician · Claremont, CA
Katherine Elizabeth Oakley, M.D. is a general practice physician with a practice address in Claremont, California, and NPI 1083064935, issued on Jun 21, 2016. Check the license (California A157730, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Katherine Elizabeth Oakley
- Credential
- M.D.
- Primary taxonomy
- General Practice Physician 208D00000X
- License number
- A157730 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1601 Monte Vista Ave Ste 190, Claremont, CA 91711
- Phone
- (909) 865-9977
- Enumerated
- Jun 21, 2016
- Record last updated
- Dec 6, 2021 (not updated in 5 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest general practice physician records → All 1,956 in California → Look up another NPI →
Also registered at 1601 Monte Vista Ave Ste 190
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Bachar Ali, D.O.Family Medicine Physician1902358575
- Monique Burleigh Sanchez-Castro, M.D.Family Medicine Physician1205247855
- Javier Chang, M.D.Family Medicine Physician1558565366
- Nicholas ChiangPhysician Assistant1245729391
- Darren Favela, PA-CPhysician Assistant1265164644
- Jennifer Guerra, MSPA-CPhysician Assistant1831425875
Verify Katherine Elizabeth Oakley in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A157730Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
50% fewer Medicare Part D claims than the average general practice physician in 2024
1,520 Medicare Part D claims for 261 beneficiaries, against an average of 3,030 among the 8,395 providers of this specialty who prescribed in Part D. 17 claims were for opioids.
Most prescribed
- Amlodipine Besylate103 claims
- Atorvastatin Calcium89 claims
- Losartan Potassium75 claims
- Lisinopril68 claims
- Levothyroxine Sodium67 claims
- Rosuvastatin Calcium44 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 73.6 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Katherine Elizabeth Oakley among 1,956 general practice physician records in California
Katherine Elizabeth Oakley, M.D. is one of 1,956 general practice physician records with a practice address in California. 48% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 76% of them.
- NPI issued2016 · 76% of these records are older, 22% newer
- In a Medicare fileYes · 48% of these records are
- In the CMS Doctors and Clinicians fileNo · 27% of these records are
- 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 208D00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
General Practice Physician providers in California
There are 1,956 general practice physician records in California.
All 1,956 in California → Every provider in Claremont → General Practice Physician nationwide →
The 8 general practice physician records with the nearest ZIP codes
- Francisco Briones, M.D.Chino, CA 917101235445719
- Jose Dheming, MDChino, CA 917101013018373
- Vernal Hansen, MDChino Hills, CA 917091871664540
- Sang Kim, M.D.Chino Hills, CA 917091568494367
- Maria Teresa Zari, M.D.Chino Hills, CA 917091306165873
- Robert Almanza, PAIrwindale, CA 917061356813604
- Amado Mandani, MDBaldwin Park, CA 917061093894552
- Jennifer Redona, MDBaldwin Park, CA 917061730250770
Common questions
What is Katherine Elizabeth Oakley, M.D.'s NPI number?
Katherine Elizabeth Oakley, M.D.'s National Provider Identifier (NPI) is 1083064935, issued on Jun 21, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Katherine Elizabeth Oakley, M.D. located?
The NPPES record lists a practice address at 1601 Monte Vista Ave Ste 190, Claremont, CA, 91711. Phone: (909) 865-9977. Providers update this record themselves, so call before visiting.
How can I verify Katherine Elizabeth Oakley, M.D.'s license?
NPPES lists California license number A157730, 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 Katherine Elizabeth Oakley, M.D. prescribe under Medicare Part D?
In 2024, Katherine Elizabeth Oakley, M.D. had 1,520 Medicare Part D claims for 261 beneficiaries; the average among general practice physician prescribers was 3,030. Part D covers Medicare prescriptions only.
What is Katherine Elizabeth Oakley, M.D.'s MIPS final score?
The 2023 MIPS final score is 73.6 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.