Gregory Spisak, D.O.
Internal Medicine Physician · Harrisburg, PA
Gregory Spisak, D.O. is an internal medicine physician with a practice address in Harrisburg, Pennsylvania, and NPI 1922412378, issued on Jun 13, 2014. Check the license (Pennsylvania OS018857, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Gregory Spisak
- Credential
- D.O.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- OS018857 PA
0116027206 VA
Self-reported in NPPES; status is on the state search - Practice location
- 4300 Londonderry RD, Harrisburg, PA 17109
- Phone
- (717) 231-8772
- Enumerated
- Jun 13, 2014
- Record last updated
- Dec 10, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (717) 231-8435
- Medicaid ID
- 103321101 PA
- Medicare enrollment
- Enrolled (PECOS I20170817000291); accepts Medicare assignment
- Medical or professional school
- Philadelphia College Of Osteopathic Medicine, 2014
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,300 in Pennsylvania → Look up another NPI →
Also registered at 4300 Londonderry RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Danya AbedeenInternal Medicine Physician1023695939
- Ankush Agarwal, M.D.Hospitalist Physician1629445721
- Fabian Alcaraz-Angulo, MDInternal Medicine Physician1144696576
- Anne Valerie Allen, MDInternal Medicine Physician1558778993
- Eli Allen, DOFamily Medicine Physician1164083192
- Alia Alsaidy, DOInternal Medicine Physician1033475405
Verify Gregory Spisak in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license OS018857Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
One hospital affiliation
- Lancaster General HospitalLancaster, PA · Acute Care Hospitals5 of 5 stars
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Gregory Spisak among 7,300 internal medicine physician records in Pennsylvania
Gregory Spisak, D.O. is one of 7,300 internal medicine physician records with a practice address in Pennsylvania. 78% 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 60% of them.
- NPI issued2014 · 60% of these records are older, 38% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated2014 · median 2008 among the 4,208 with a school on file
- Record last updated2018 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
184 internal medicine physician records list a practice address in Harrisburg
They are 184 of the 3,963 NPPES records with a practice address in Harrisburg, and 7,300 internal medicine physician records in Pennsylvania.
All 7,300 in Pennsylvania → Every provider in Harrisburg → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Lawrence Appel, MDHarrisburg, PA 171091952375453
- Jeffrey Backenstoes, D.O.Harrisburg, PA 171091215985270
- Sevdalina Boshnakov, MDHarrisburg, PA 171091710090212
- David Bronstein, DOHarrisburg, PA 171091194758094
- Mary Davies, MDHarrisburg, PA 171091831113620
- Brian Deramo, DOHarrisburg, PA 171091427088525
- John Freshman, MDHarrisburg, PA 171091659330074
- Charles Gerlach, M.D.Harrisburg, PA 171091053369447
Common questions
What is Gregory Spisak, D.O.'s NPI number?
Gregory Spisak, D.O.'s National Provider Identifier (NPI) is 1922412378, issued on Jun 13, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Spisak, D.O. located?
The NPPES record lists a practice address at 4300 Londonderry RD, Harrisburg, PA, 17109. Phone: (717) 231-8772. Providers update this record themselves, so call before visiting.
How can I verify Gregory Spisak, D.O.'s license?
NPPES lists Pennsylvania license number OS018857, as entered by the provider. Search the Pennsylvania Department of State (PALS) at https://www.pals.pa.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
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.