Tammy Nadine O'Neill, PA-C
Physician Assistant · Bishop, CA
Tammy Nadine O'Neill, PA-C is a physician assistant with a practice address in Bishop, California, and NPI 1548454101, issued on Aug 28, 2007. Check the license (California PA23196, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Tammy Nadine O'Neill
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License numbers
- PA23196 CA
PA10005256 WA
Self-reported in NPPES; status is on the state search - Practice location
- 153 Pioneer LN Ste B, Bishop, CA 93514
- Phone
- (760) 873-2849
- Enumerated
- Aug 28, 2007
- Record last updated
- Jun 16, 2026
- Medicare enrollment
- Enrolled (PECOS I20170726003290); accepts Medicare assignment
- Entity
- Type 1 · individual
Also registered at 153 Pioneer LN Ste B
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Lois Alexander, FNPNurse Practitioner1447502471
- Thomas Boo, MDFamily Medicine Physician1255664124
- Rachel Chamberlain, DOObstetrics & Gynecology Physician1902293277
- Linda Christensen, LCSWClinical Social Worker1477021756
- Jennifer Figueroa, PAPhysician Assistant1386014181
- Elizabeth Haun, FNPFamily Nurse Practitioner1679266266
Verify Tammy Nadine O'Neill in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license PA23196Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
43% fewer Medicare Part D claims than the average physician assistant in 2024
469 Medicare Part D claims for 325 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D.
Most prescribed
- Amoxicillin-Clavulanate Potass68 claims
- Azithromycin68 claims
- Nitrofurantoin Mono-Macro41 claims
- Paxlovid36 claims
- Prednisone29 claims
- Albuterol Sulfate Hfa26 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
- Northern Inyo Healthcare DistrictBishop, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
5 physician assistant records list a practice address in Bishop
They are 5 of the 336 NPPES records with a practice address in Bishop, and 14,451 physician assistant records in California.
All 5 in Bishop → All 14,451 in California → Every provider in Bishop →
Other physician assistant records in California
- Marcia -Galbraith, PAStockton, CA1407143274
- Danny Abad, PAOrange, CA1477158673
- Lea Dominique Abadies, PATustin, CA1124754254
- Rea Elizabeth Abaniel, P.A.-CSeal Beach, CA1396173621
- Ramina Abbasi, PA-CSignal Hill, CA1093448300
- Ariel Abbott, PA-CStockton, CA1780334342
- Barrie Abbott, PA-CAnza, CA1861602575
- Elizabeth Abbott, PA-CSan Diego, CA1437540762
- Terri Abbott, P.A.La Jolla, CA1811165566
- Angela Abboud, MMS, PA-CSanta Rosa, CA1114399334
Common questions
What is Tammy Nadine O'Neill, PA-C's NPI number?
Tammy Nadine O'Neill, PA-C's National Provider Identifier (NPI) is 1548454101, issued on Aug 28, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Tammy Nadine O'Neill, PA-C located?
The NPPES record lists a practice address at 153 Pioneer LN Ste B, Bishop, CA, 93514. Phone: (760) 873-2849. Providers update this record themselves, so call before visiting.
How can I verify Tammy Nadine O'Neill, PA-C's license?
NPPES lists California license number PA23196, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Tammy Nadine O'Neill, PA-C prescribe under Medicare Part D?
In 2024, Tammy Nadine O'Neill, PA-C had 469 Medicare Part D claims for 325 beneficiaries; the average among physician assistant prescribers was 830. 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.