Gaylen S. Johnson, M.D.
Occupational Medicine Physician · Hagerstown, MD
Gaylen S. Johnson, M.D. is an occupational medicine physician with a practice address in Hagerstown, Maryland, and NPI 1952326548, issued on Jul 13, 2006. Check the license (Maryland D54711, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Gaylen S. Johnson
- Credential
- M.D.
- Primary taxonomy
- Occupational Medicine Physician 2083X0100X
- License number
- D54711 MD
Self-reported in NPPES; status is on the state search - Practice location
- 10715 Downsville Pike, Hagerstown, MD 21740
- Phone
- (240) 313-9910
- Enumerated
- Jul 13, 2006
- Record last updated
- Dec 31, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (240) 313-9915
- Entity
- Type 1 · individual
8 nearest occupational medicine physician records → All 69 in Maryland → Look up another NPI →
Also registered at 10715 Downsville Pike
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Donna Catt, PA-CPhysician Assistant1902998222
Verify Gaylen S. Johnson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D54711Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Most of these Medicare Part D claims are vaccines, 100% of the cost of the top drugs
17 Medicare Part D claims for 14 beneficiaries, against an average of 794 among the 463 providers of this specialty who prescribed in Part D. Brand-name drugs were 94% of claims.
Most prescribed
Pharmacies often give vaccines under a standing order that names one clinician, and CMS counts every such claim under that clinician's NPI. These claims are therefore not a measure of this clinician's own prescribing.
- Shingrix12 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.
Gaylen S. Johnson among 69 occupational medicine physician records in Maryland
Gaylen S. Johnson, M.D. is one of 69 occupational medicine physician records with a practice address in Maryland. 9% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 77% newer
- In a Medicare fileYes · 9% of these records are
- In the CMS Doctors and Clinicians fileNo · 4% of these records are
- Record last updated2013 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2083X0100X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Occupational Medicine Physician providers in Maryland
There are 69 occupational medicine physician records in Maryland.
All 69 in Maryland → Every provider in Hagerstown → Occupational Medicine Physician nationwide →
The 8 occupational medicine physician records with the nearest ZIP codes
- Joseph Wilson, M.D.Hagerstown, MD 217421689891608
- Anton Quist, MDFrederick, MD 217021487992178
- Manmohan Ranadive, M.D.Fort Detrick, MD 217021316924996
- Qi Chen, M.D., M.P.H.Frederick, MD 217011164658639
- Jenny Garcia Castaneda, MD, MPHFrederick, MD 217011528643756
- Rashid Gill, MDOcean City, MD 218421235291659
- Sarah DiekmanOakland, MD 215501427497908
- Janet Dignan, OTRLCumberland, MD 215021952571846
Common questions
What is Gaylen S. Johnson, M.D.'s NPI number?
Gaylen S. Johnson, M.D.'s National Provider Identifier (NPI) is 1952326548, issued on Jul 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gaylen S. Johnson, M.D. located?
The NPPES record lists a practice address at 10715 Downsville Pike, Hagerstown, MD, 21740. Phone: (240) 313-9910. Providers update this record themselves, so call before visiting.
How can I verify Gaylen S. Johnson, M.D.'s license?
NPPES lists Maryland license number D54711, as entered by the provider. Search the Maryland Board of Physicians at https://www.mbp.state.md.us/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Gaylen S. Johnson, M.D. prescribe under Medicare Part D?
In 2024, Gaylen S. Johnson, M.D. had 17 Medicare Part D claims for 14 beneficiaries; the average among occupational medicine physician prescribers was 794. 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.