Tia Gialuong O'Brien, PA-C
Physician Assistant · Williamsport, PA
Tia Gialuong O'Brien, PA-C is a physician assistant with a practice address in Williamsport, Pennsylvania, and NPI 1538715057, issued on Aug 12, 2019. Check the license (Pennsylvania MA063818, as entered in NPPES) with the Pennsylvania board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Tia Gialuong O'Brien
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License numbers
- MA063818 PA
OA006188 PA
25MP00831300 NJ
031788-01 NY
50.008686RX OH
Self-reported in NPPES; status is on the state search - Practice location
- 1 College Ave # Dif123, Williamsport, PA 17701
- Phone
- (570) 327-4779
- Enumerated
- Aug 12, 2019
- Record last updated
- Sep 26, 2024
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 8,020 in Pennsylvania → Look up another NPI →
Also registered at 1 College Ave # Dif123
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Samer DossStudent in an Organized Health Care Education/Training Program1710533237
Verify Tia Gialuong O'Brien in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Pennsylvania board licenses this profession
Search for license MA063818Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
63% fewer Medicare Part D claims than the average physician assistant in 2024
305 Medicare Part D claims for 167 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims.
Most prescribed
- Doxycycline Monohydrate27 claims
- Prednisone25 claims
- Amoxicillin-Clavulanate Potass23 claims
- Sulfamethoxazole-Trimethoprim22 claims
- Fluticasone Propionate20 claims
- Methylprednisolone18 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.
Tia Gialuong O'Brien among 8,020 physician assistant records in Pennsylvania
Tia Gialuong O'Brien, PA-C is one of 8,020 physician assistant records with a practice address in Pennsylvania. 80% 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 57% of them.
- NPI issued2019 · 57% of these records are older, 37% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileNo · 66% of these records are
- Record last updated2024 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
137 physician assistant records list a practice address in Williamsport
They are 137 of the 1,371 NPPES records with a practice address in Williamsport, and 8,020 physician assistant records in Pennsylvania.
All 8,020 in Pennsylvania → Every provider in Williamsport → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Sheryl BakerWilliamsport, PA 177011952370033
- Bruce Body, PA-CWilliamsport, PA 177011467430942
- Jennifer Bressler, PA-CWilliamsport, PA 177011861487886
- Wayne Butler, PA-CWilliamsport, PA 177011205801107
- Richard Davies, PA-CWilliamsport, PA 177011316913494
- Kelly FarrellWilliamsport, PA 177011285602722
- Nancy GuerriskyWilliamsport, PA 177011093761728
- Charles Haney, PA-CWilliamsport, PA 177011619946498
Common questions
What is Tia Gialuong O'Brien, PA-C's NPI number?
Tia Gialuong O'Brien, PA-C's National Provider Identifier (NPI) is 1538715057, issued on Aug 12, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Tia Gialuong O'Brien, PA-C located?
The NPPES record lists a practice address at 1 College Ave # Dif123, Williamsport, PA, 17701. Phone: (570) 327-4779. Providers update this record themselves, so call before visiting.
How can I verify Tia Gialuong O'Brien, PA-C's license?
NPPES lists Pennsylvania license number MA063818, as entered by the provider. Search the Pennsylvania board that licenses this profession; the NPPES record confirms identity only.
How much does Tia Gialuong O'Brien, PA-C prescribe under Medicare Part D?
In 2024, Tia Gialuong O'Brien, PA-C had 305 Medicare Part D claims for 167 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.