Justin K. Johnson, DO
Internal Medicine Physician · Harrisburg, PA
Justin K. Johnson, DO is an internal medicine physician with a practice address in Harrisburg, Pennsylvania, and NPI 1962822593, issued on Apr 22, 2014. Check the license (Pennsylvania OS018368, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Justin K. Johnson
- Credential
- DO
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- OS018368 PA
Self-reported in NPPES; status is on the state search - Practice location
- 4300 Londonderry RD, Harrisburg, PA 17109
- Phone
- (717) 231-8772
- Enumerated
- Apr 22, 2014
- Record last updated
- Jan 19, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (717) 231-8435
- Medicare enrollment
- Enrolled (PECOS I20180621002092); accepts Medicare assignment
- Medical or professional school
- Philadelphia College Of Osteopathic Medicine, 2014
- Telehealth
- Offers telehealth (CMS)
- 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.
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Verify Justin K. Johnson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license OS018368Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
85% fewer Medicare Part D claims than the average internal medicine physician in 2024
476 Medicare Part D claims for 219 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 23 claims were for opioids.
Most prescribed
- Prednisone37 claims
- Albuterol Sulfate Hfa25 claims
- Cefuroxime25 claims
- Clopidogrel18 claims
- Metoprolol Succinate16 claims
- Atorvastatin Calcium13 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.
Bills Medicare through 2 group practices
- Main Line HealthcareWynewood, PA
- University OF Pittsburgh PhysiciansCranberry Township, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Justin K. Johnson among 7,300 internal medicine physician records in Pennsylvania
Justin K. Johnson, DO 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 updated2021 · 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 Justin K. Johnson, DO's NPI number?
Justin K. Johnson, DO's National Provider Identifier (NPI) is 1962822593, issued on Apr 22, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Justin K. Johnson, DO 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 Justin K. Johnson, DO's license?
NPPES lists Pennsylvania license number OS018368, 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.
How much does Justin K. Johnson, DO prescribe under Medicare Part D?
In 2024, Justin K. Johnson, DO had 476 Medicare Part D claims for 219 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.