Gregory A. Johnson, D.C.
Chiropractor · Williamsport, PA
Gregory A. Johnson, D.C. is a chiropractor with a practice address in Williamsport, Pennsylvania, and NPI 1528100799, issued on Feb 13, 2007. Check the license (Pennsylvania DC001407L, as entered in NPPES) with the Pennsylvania board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Gregory A. Johnson
- Credential
- D.C.
- Primary taxonomy
- Chiropractor 111N00000X
- License number
- DC001407L PA
Self-reported in NPPES; status is on the state search - Practice location
- 800 W 4TH St, Williamsport, PA 17701
- Phone
- (570) 323-8961
- Enumerated
- Feb 13, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (570) 321-1493
- Medicare enrollment
- Enrolled (PECOS I20090107000556); may accept Medicare assignment
- Medical or professional school
- Palmer College Chiropractic - West Sunnyvale, 1972
- Entity
- Type 1 · individual
8 nearest chiropractor records → All 3,934 in Pennsylvania → Look up another NPI →
Also registered at 800 W 4TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Brett Johnson, D.C.Chiropractor1821131715
Verify Gregory A. Johnson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Pennsylvania board licenses this profession
Search for license DC001407LCheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Gregory A. Johnson among 3,934 chiropractor records in Pennsylvania
Gregory A. Johnson, D.C. is one of 3,934 chiropractor records with a practice address in Pennsylvania. 16% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2007, is newer than 49% of them.
- NPI issued2007 · 49% of these records are older, 35% newer
- In a Medicare fileNo · 16% of these records are
- In the CMS Doctors and Clinicians fileYes · 45% of these records are
- Graduated1972 · median 2000 among the 1,759 with a school on file
- Record last updated2007 · 75% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 111N00000X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
21 chiropractor records list a practice address in Williamsport
They are 21 of the 1,371 NPPES records with a practice address in Williamsport, and 3,934 chiropractor records in Pennsylvania. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 3,934 in Pennsylvania → Every provider in Williamsport → Chiropractor nationwide →
The 8 chiropractor records with the nearest ZIP codes
- Valerie Doebler, DCWilliamsport, PA 177011033189618
- Mark Hampton, D.C.Williamsport, PA 177011528072725
- Brett Johnson, D.C.Williamsport, PA 177011821131715
- David Machmer, D.C.Williamsport, PA 177011457322521
- Marilynn Petruney, DCWilliamsport, PA 177011962560813
- William Piotrowski, DCWilliamsport, PA 177011497738710
- George Solley, D.C.Williamsport, PA 177011508854779
- Keith StigerWilliamsport, PA 177011720264799
Common questions
What is Gregory A. Johnson, D.C.'s NPI number?
Gregory A. Johnson, D.C.'s National Provider Identifier (NPI) is 1528100799, issued on Feb 13, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Gregory A. Johnson, D.C. located?
The NPPES record lists a practice address at 800 W 4TH St, Williamsport, PA, 17701. Phone: (570) 323-8961. Providers update this record themselves, so call before visiting.
How can I verify Gregory A. Johnson, D.C.'s license?
NPPES lists Pennsylvania license number DC001407L, as entered by the provider. Search the Pennsylvania board that licenses this profession; the NPPES record confirms identity 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. 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.