Keith Hammack, PA-C
Physician Assistant · Williamsport, PA
Keith Hammack, PA-C is a physician assistant with a practice address in Williamsport, Pennsylvania, and NPI 1548664725, issued on Oct 16, 2014. Check the license (Pennsylvania MA057224, as entered in NPPES) with the Pennsylvania board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Keith Hammack
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- MA057224 PA
Self-reported in NPPES; status is on the state search - Practice location
- 740 High St, Williamsport, PA 17701
- Phone
- (570) 321-3165
- Enumerated
- Oct 16, 2014
- Record last updated
- Dec 10, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (570) 321-3166
- Medicare enrollment
- Enrolled (PECOS I20141216001975); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 8,020 in Pennsylvania → Look up another NPI →
Also registered at 740 High St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Keith Hammack in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Pennsylvania board licenses this profession
Search for license MA057224Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
55% fewer Medicare Part D claims than the average physician assistant in 2024
372 Medicare Part D claims for 69 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. 28 claims were for opioids.
Most prescribed
- Clopidogrel54 claims
- Pantoprazole Sodium43 claims
- Metoprolol Succinate33 claims
- Metoprolol Tartrate32 claims
- Atorvastatin Calcium26 claims
- Potassium Chloride25 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 81.5 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $206.81
5 payments; by number, the most common kind was food and beverage; the largest payer was Atricure, Inc. The 64,719 providers of this specialty with any payment received $841.65 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Susquehanna Physician ServicesWilliamsport, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Keith Hammack among 8,020 physician assistant records in Pennsylvania
Keith Hammack, 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 2014, is newer than 38% of them.
- NPI issued2014 · 38% of these records are older, 59% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2014 · median 2018 among the 5,313 with a school on file
- Record last updated2019 · 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 Keith Hammack, PA-C's NPI number?
Keith Hammack, PA-C's National Provider Identifier (NPI) is 1548664725, issued on Oct 16, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Keith Hammack, PA-C located?
The NPPES record lists a practice address at 740 High St, Williamsport, PA, 17701. Phone: (570) 321-3165. Providers update this record themselves, so call before visiting.
How can I verify Keith Hammack, PA-C's license?
NPPES lists Pennsylvania license number MA057224, as entered by the provider. Search the Pennsylvania board that licenses this profession; the NPPES record confirms identity only.
How much does Keith Hammack, PA-C prescribe under Medicare Part D?
In 2024, Keith Hammack, PA-C had 372 Medicare Part D claims for 69 beneficiaries; the average among physician assistant prescribers was 830. Part D covers Medicare prescriptions only.
What is Keith Hammack, PA-C's MIPS final score?
The 2023 MIPS final score is 81.5 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.