Colleen O'Neil-Tennant, MD
Adult Medicine Physician · Oakhurst, CA
Colleen O'Neil-Tennant, MD is an adult medicine physician with a practice address in Oakhurst, California, and NPI 1194286047, issued on Mar 25, 2019. Check the license (California A179168, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Colleen O'Neil-Tennant
- Credential
- MD
- Primary taxonomy
- Adult Medicine Physician 207QA0505X
- License number
- A179168 CA
Self-reported in NPPES; status is on the state search - Practice location
- 40595 Westlake Dr, Oakhurst, CA 93644
- Phone
- (559) 658-8388
- Enumerated
- Mar 25, 2019
- Record last updated
- Sep 19, 2022
- Medicare enrollment
- Enrolled (PECOS I20230221000742); accepts Medicare assignment
- Medical or professional school
- University Of California, Geffen School Of Medicine, 2019
- Entity
- Type 1 · individual
8 nearest adult medicine physician records → All 386 in California → Look up another NPI →
Also registered at 40595 Westlake Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Fellipe Lima Nobre De Queiroz, MDFamily Medicine Physician1417511205
Verify Colleen O'Neil-Tennant in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A179168Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
84% more Medicare Part D claims than the average adult medicine physician in 2024
5,513 Medicare Part D claims for 475 beneficiaries, against an average of 3,002 among the 1,307 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 211 claims were for opioids.
Most prescribed
- Levothyroxine Sodium352 claims
- Amlodipine Besylate282 claims
- Atorvastatin Calcium271 claims
- Lisinopril193 claims
- Hydrocodone-Acetaminophen158 claims
- Losartan Potassium157 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
- Permanente Medical Group IncOakhurst, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Colleen O'Neil-Tennant among 386 adult medicine physician records in California
Colleen O'Neil-Tennant, MD is one of 386 adult medicine physician records with a practice address in California. 69% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 81% of them.
- NPI issued2019 · 81% of these records are older, 16% newer
- In a Medicare fileYes · 69% of these records are
- In the CMS Doctors and Clinicians fileYes · 48% of these records are
- Graduated2019 · median 2005 among the 187 with a school on file
- Record last updated2022 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207QA0505X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Adult Medicine Physician providers in California
There are 386 adult medicine physician records in California.
All 386 in California → Every provider in Oakhurst → Adult Medicine Physician nationwide →
The 8 adult medicine physician records with the nearest ZIP codes
- Komola Shaban, MDClovis, CA 936111326495235
- Patrick Matian, DOFresno, CA 937011821726548
- Jusel Ruelan, D.O.Fresno, CA 937011942644398
- Sebouh Krioghlian, D.O.Fresno, CA 937201033558275
- Chunxia Li, M.D.,PH.D.Fresno, CA 937201447552328
- Gessie Lurlay, MDFresno, CA 937201003445677
- Luis Martinez, M.D.Fresno, CA 937201134423684
- Albert Mu, D.O.Fresno, CA 937201205001559
Common questions
What is Colleen O'Neil-Tennant, MD's NPI number?
Colleen O'Neil-Tennant, MD's National Provider Identifier (NPI) is 1194286047, issued on Mar 25, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Colleen O'Neil-Tennant, MD located?
The NPPES record lists a practice address at 40595 Westlake Dr, Oakhurst, CA, 93644. Phone: (559) 658-8388. Providers update this record themselves, so call before visiting.
How can I verify Colleen O'Neil-Tennant, MD's license?
NPPES lists California license number A179168, 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 Colleen O'Neil-Tennant, MD prescribe under Medicare Part D?
In 2024, Colleen O'Neil-Tennant, MD had 5,513 Medicare Part D claims for 475 beneficiaries; the average among adult medicine physician prescribers was 3,002. 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.