John M. Gerwig, P.A.-C.
Physician Assistant · Baltimore, MD
John M. Gerwig, P.A.-C. is a physician assistant with a practice address in Baltimore, Maryland, and NPI 1750335105, issued on May 20, 2006. Check the license (Maryland C01805, as entered in NPPES) with the Maryland board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- John M. Gerwig
- Credential
- P.A.-C.
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- C01805 MD
Self-reported in NPPES; status is on the state search - Practice location
- 600 N Wolfe St, Baltimore, MD 21287
- Phone
- (410) 955-9434
- Enumerated
- May 20, 2006
- Record last updated
- Jul 8, 2010 (not updated in 16 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 3,224 in Maryland → Look up another NPI →
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Verify John M. Gerwig in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Maryland board licenses this profession
Search for license C01805Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
97% fewer Medicare Part D claims than the average physician assistant in 2024
21 Medicare Part D claims, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 95% of claims.
Most prescribed
- Biktarvy13 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.
John M. Gerwig among 3,224 physician assistant records in Maryland
John M. Gerwig, P.A.-C. is one of 3,224 physician assistant records with a practice address in Maryland. 76% 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 3% of them.
- NPI issued2006 · 3% of these records are older, 83% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileNo · 61% of these records are
- Record last updated2010 · 46% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1,135 physician assistant records list a practice address in Baltimore
They are 1,135 of the 35,183 NPPES records with a practice address in Baltimore, and 3,224 physician assistant records in Maryland.
All 3,224 in Maryland → Every provider in Baltimore → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Alice Armour, P.A.-C.Baltimore, MD 212871659336410
- Glenn Beauman, P.A.-C.Baltimore, MD 212871407811391
- Nancy Crawford, P.A.-C.Baltimore, MD 212871215985775
- Mandy David, P.A.-C.Baltimore, MD 212871902858715
- William Fleming, PA-CBaltimore, MD 212871477501385
- Karen Frangione, PACBaltimore, MD 212871639131634
- Rebecca Godfrey, P.A.-C.Baltimore, MD 212871255385522
- Mary Guay, PA-CBaltimore, MD 212871790769008
Common questions
What is John M. Gerwig, P.A.-C.'s NPI number?
John M. Gerwig, P.A.-C.'s National Provider Identifier (NPI) is 1750335105, issued on May 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John M. Gerwig, P.A.-C. located?
The NPPES record lists a practice address at 600 N Wolfe St, Baltimore, MD, 21287. Phone: (410) 955-9434. Providers update this record themselves, so call before visiting.
How can I verify John M. Gerwig, P.A.-C.'s license?
NPPES lists Maryland license number C01805, as entered by the provider. Search the Maryland board that licenses this profession; the NPPES record confirms identity only.
How much does John M. Gerwig, P.A.-C. prescribe under Medicare Part D?
In 2024, John M. Gerwig, P.A.-C. had 21 Medicare Part D claims; the average among physician assistant prescribers was 830. 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.