Dr. Gaylen S. Johnson, MD
- Part D claims, 2024
- 17
- Affiliated sites
- 2
- Medical group
- 1
- State licenses
- 5
- Year NPI issued
- 2006
- Practice address
- 11110 Medical Campus Rd, Hagerstown, MD 21742
- Practice phone
- Call (301) 790-8624
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Meritus Medical Laboratory - Meritus Medical Plaza, Hagerstown
Mobile Lab · Hagerstown, Maryland
Find Dr. Johnson's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Gaylen S. Johnson is an occupational medicine physician in Hagerstown, Maryland
Dr. Johnson practices at Meritus Medical Laboratory - Meritus Medical Plaza, Hagerstown in Hagerstown, Maryland.
Dr. Johnson's NPI, 1952326548, was assigned on July 13, 2006. Dr. Johnson graduated from West Virginia University School Of Medicine in 1990. Dr. Johnson holds Maryland license D54711.
- NPI
- 1952326548NPI Registry (opens in a new tab)
- NPI enumeration date
- July 13, 2006
- NPI status
- Active
- Practice phone
- (301) 790-8624
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Medical school graduation
- 1990
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Gaylen S. Johnson practices at Meritus Medical Laboratory - Meritus Medical Plaza, Hagerstown in Hagerstown, Maryland
Dr. Johnson's primary practice is Meritus Medical Laboratory - Meritus Medical Plaza, Hagerstown, at 11110 Medical Campus Rd, Hagerstown, MD 21742. The practice phone is (301) 790-8624.
- Meritus Medical Laboratory - Meritus Medical Plaza, Hagerstown11110 Medical Campus Rd, Hagerstown, MD 21742Phone(301) 790-8624
Source: Dmand AI Affiliation Data
Dr. Gaylen S. Johnson is affiliated with 2 sites of care and 1 medical group
Dr. Johnson's primary practice is Meritus Medical Laboratory - Meritus Medical Plaza, Hagerstown in Hagerstown, Maryland. The medical group on file is Meritus Robinwood Orthopedics. Dmand AI also links Dr. Johnson to 1 more group practice or clinic, named with a free account. Dr. Johnson's employer is on file too: a clinical lab.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Gaylen S. Johnson's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Johnson practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Meritus Medical Laboratory - Meritus Medical Plaza, Hagerstown | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gaylen S. Johnson is one of 14 occupational medicine physicians in Maryland
Occupational medicine is Dr. Johnson's primary specialty in the NPI Registry, under taxonomy code 2083X0100X. Dr. Johnson is board certified in aerospace medicine by the American Board of Preventive Medicine. Dmand AI has Dr. Johnson's licenses on file in 5 states: Maryland, West Virginia, North Carolina, Texas and Ohio.
Specialties and state licenses
- Occupational medicine, MarylandPrimary
- West Virginia license
- North Carolina license
- Texas license
- Ohio license
Occupational medicine physicians near Dr. Johnson
Counts of occupational medicine physicians with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Gaylen S. Johnson's patients have a median age of 48
Across all payers, Dmand AI patient panel data puts Dr. Johnson's median patient age at 48, with 27% women.
Dr. Johnson's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 48
Patient panel by sex, all payers
- Women27%
- Men73%
Source: Dmand AI Patient Panel Data
Dr. Gaylen S. Johnson wrote 17 Medicare Part D claims in 2024
In 2024, Dr. Johnson wrote 17 Medicare Part D claims for 14 patients. CMS names the drug for 12 of them, across 1 drug with 11 or more claims each, at $2,565 in total drug cost.
Dr. Johnson's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
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Dr. Gaylen S. Johnson graduated from West Virginia University School Of Medicine
Dr. Johnson graduated from West Virginia University School Of Medicine in 1990.
- Medical school
- Board certified in aerospace medicine
Source: Dmand AI Professional Profile Data
Sources for Dr. Gaylen S. Johnson's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Gaylen S. Johnson
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Gaylen S. Johnson's NPI number?
Dr. Gaylen S. Johnson's NPI number is 1952326548. It was assigned on July 13, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Gaylen S. Johnson?
Dr. Gaylen S. Johnson is an occupational medicine physician in Hagerstown, Maryland. The primary specialty in the NPI Registry is Occupational Medicine Physician (taxonomy code 2083X0100X).
Where does Dr. Gaylen S. Johnson practice?
Dr. Johnson practices at 11110 Medical Campus Rd, Hagerstown, MD 21742. Dr. Johnson's primary practice is Meritus Medical Laboratory - Meritus Medical Plaza, Hagerstown in Hagerstown, Maryland. Dmand AI also links Dr. Johnson to 1 group practice or clinic.
What is Dr. Gaylen S. Johnson's office phone number?
The practice phone on file for Dr. Johnson is (301) 790-8624.
What is Dr. Gaylen S. Johnson's medical license number?
Dr. Johnson holds Maryland license D54711, one of the licenses on file in 5 states.
Which states has Dr. Gaylen S. Johnson been licensed in?
Dmand AI has state licenses on file for Dr. Johnson in Maryland (1999 to 2026), West Virginia (1991 to 2026), North Carolina (1997 to 2000), Texas (1994 to 1997) and Ohio (1991 to 1994).
What medical group is Dr. Gaylen S. Johnson part of?
Dr. Johnson is linked to Meritus Robinwood Orthopedics.
Is Dr. Gaylen S. Johnson board certified?
Yes. Dr. Johnson is board certified in aerospace medicine by the American Board of Preventive Medicine.
Where did Dr. Gaylen S. Johnson go to medical school?
Dr. Johnson graduated from West Virginia University School Of Medicine in 1990.
What drugs does Dr. Gaylen S. Johnson prescribe most?
In 2024 Medicare Part D data, Dr. Johnson's most prescribed drugs by claims were Shingrix.
How long has Dr. Gaylen S. Johnson been practicing?
Dr. Johnson graduated from medical school in 1990, 36 years ago.
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