Tia O'Brien, PA-C
NPI 1538715057 · Physician Assistant · Williamsport, PA
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Tia O'Brien, PA-C is a Physician Assistant provider in Williamsport, PA (NPI 1538715057).
Provider details
- NPI number
- 1538715057
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA-C
- Sex
- Female
- Sole proprietor
- No
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
- Physician Assistant363A00000X
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
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
6 yrs in NPPES registry
- Profile completeness38% of score
83% 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 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Doxycycline Monohydrate | 27 | 27 |
| Prednisone | 25 | 25 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 23 | 23 |
| Sulfamethoxazole/Trimethoprimbrand: Sulfamethoxazole-Trimethoprim | 22 | 21 |
| Fluticasone Propionate | 20 | 19 |
| Methylprednisolone | 18 | 17 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa |
Practice location
Mailing address
Registry dates
- Enumerated
- 2019-08-12
- Last updated
- 2024-09-26
- Certified
- 2024-09-26
Frequently asked questions
- What is Tia O'Brien's NPI number?
- Tia O'Brien's National Provider Identifier (NPI) is 1538715057, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tia O'Brien's specialty?
- Tia O'Brien is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Tia O'Brien located?
- Tia O'Brien's practice location on file with NPPES is 1 College Ave # Dif123, Williamsport, PA 17701-5778.
- What is Tia O'Brien's phone number?
- The practice phone number listed in the NPPES registry for Tia O'Brien is (570) 327-4779.
- Does Tia O'Brien accept Medicare?
- Tia O'Brien is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Tia O'Brien's NPI active?
- Yes — Tia O'Brien's NPI (1538715057) is active in the NPPES registry as of the last update on 2024-09-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.