Tammy O'Neill, PA-C
NPI 1548454101 · Physician Assistant · Bishop, CA
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Tammy O'Neill, PA-C is a Physician Assistant provider in Bishop, CA (NPI 1548454101).
Provider details
- NPI number
- 1548454101
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA-C
- Sex
- Female
- Sole proprietor
- No
- License
- PA23196 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
18 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 9 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 68 | 64 |
| Azithromycin | 68 | 58 |
| Nitrofurantoin Monohyd/M-Crystbrand: Nitrofurantoin Mono-Macro | 41 | 39 |
| Nirmatrelvir/Ritonavirbrand: Paxlovid | 36 | 35 |
| Prednisone | 29 | 26 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 26 | 25 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-08-28
- Last updated
- 2017-08-02
Frequently asked questions
- What is Tammy O'Neill's NPI number?
- Tammy O'Neill's National Provider Identifier (NPI) is 1548454101, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tammy O'Neill's specialty?
- Tammy O'Neill is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Tammy O'Neill located?
- Tammy O'Neill's practice location on file with NPPES is 152 Pioneer Ln, Bishop, CA 93514-2563.
- What is Tammy O'Neill's phone number?
- The practice phone number listed in the NPPES registry for Tammy O'Neill is (760) 873-2506.
- Does Tammy O'Neill accept Medicare?
- Tammy O'Neill is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Tammy O'Neill's NPI active?
- Yes — Tammy O'Neill's NPI (1548454101) is active in the NPPES registry as of the last update on 2017-08-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.