Joseph Michael Kosakoski, D.O.
Family Medicine Physician · Lancaster, PA
Joseph Michael Kosakoski, D.O. is a family medicine physician with a practice address in Lancaster, Pennsylvania, and NPI 1659468627, issued on Oct 9, 2006. Check the license (Pennsylvania OS4628L, as entered in NPPES) on the Pennsylvania Department of State (PALS); the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Joseph Michael Kosakoski
- Credential
- D.O.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- OS4628L PA
Self-reported in NPPES; status is on the state search - Practice location
- 230 Harrisburg Ave, Lancaster, PA 17603
- Phone
- (717) 509-1931
- Enumerated
- Oct 9, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (717) 509-1934
- Entity
- Type 1 · individual
Also registered at 230 Harrisburg Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Joseph Michael Kosakoski in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license OS4628LCheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
213 family medicine physician records list a practice address in Lancaster
They are 213 of the 5,378 NPPES records with a practice address in Lancaster, and 7,483 family medicine physician records in Pennsylvania. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 213 in Lancaster → All 7,483 in Pennsylvania → Every provider in Lancaster →
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Common questions
What is Joseph Michael Kosakoski, D.O.'s NPI number?
Joseph Michael Kosakoski, D.O.'s National Provider Identifier (NPI) is 1659468627, issued on Oct 9, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Joseph Michael Kosakoski, D.O. located?
The NPPES record lists a practice address at 230 Harrisburg Ave, Lancaster, PA, 17603. Phone: (717) 509-1931. Providers update this record themselves, so call before visiting.
How can I verify Joseph Michael Kosakoski, D.O.'s license?
NPPES lists Pennsylvania license number OS4628L, 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. 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.