Marc C. Johnson
Audiologist · Baltimore, MD
Marc C. Johnson is an audiologist with a practice address in Baltimore, Maryland, and NPI 1942617147, issued on Jul 20, 2014. Check the license (Maryland 01350, as entered in NPPES) with the Maryland board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Marc C. Johnson
- Primary taxonomy
- Audiologist 231H00000X
- License number
- 01350 MD
Self-reported in NPPES; status is on the state search - Practice location
- 601 N Caroline St FL 6, Baltimore, MD 21287
- Phone
- (410) 955-6153
- Enumerated
- Jul 20, 2014
- Record last updated
- Aug 11, 2016 (not updated in 10 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest audiologist records → All 519 in Maryland → Look up another NPI →
Also registered at 601 N Caroline St FL 6
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Walleed H R M A Q Almutairi, MB BCH BAOOtolaryngology Physician1477416485
- Caroline ColeStudent in an Organized Health Care Education/Training Program1104521038
- Brigit Corej, MA, CF-SLPSpeech-Language Pathologist1336013580
- Ashley Davis, M.S., CCC-SLPSpeech-Language Pathologist1700230125
- Andrew Etheridge, CCA, CFO, CFM, CPEDAnaplastologist1487246369
- Juan Garcia, CCAAnaplastologist1003840166
Verify Marc C. Johnson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Maryland board licenses this profession
Search for license 01350Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Marc C. Johnson among 519 audiologist records in Maryland
Marc C. Johnson is one of 519 audiologist records with a practice address in Maryland. 43% 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 2014, is newer than 52% of them.
- NPI issued2014 · 52% of these records are older, 44% newer
- In a Medicare fileNo · 43% of these records are
- In the CMS Doctors and Clinicians fileNo · 46% of these records are
- Record last updated2016 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 231H00000X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Audiologist providers in Maryland
There are 519 audiologist records in Maryland. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 519 in Maryland → Every provider in Baltimore → Audiologist nationwide →
The 8 audiologist records with the nearest ZIP codes
- Dana Boatman, AUDBaltimore, MD 212871811953508
- Stephen Bowditch, M.S.Baltimore, MD 212871760449599
- Ryan Carpenter, AU.D.Baltimore, MD 212871659410736
- Courtney Carver, AU.D.Baltimore, MD 212871295876985
- Jaleh Garman, AUDBaltimore, MD 212871962456418
- Stephanie Lockshaw, AU.DBaltimore, MD 212871568815629
- Andrea Marlowe, M.A., CCC-ABaltimore, MD 212871053452284
- Allison McGrath, AU.D.Baltimore, MD 212871275983256
Common questions
What is Marc C. Johnson's NPI number?
Marc C. Johnson's National Provider Identifier (NPI) is 1942617147, issued on Jul 20, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Marc C. Johnson located?
The NPPES record lists a practice address at 601 N Caroline St FL 6, Baltimore, MD, 21287. Phone: (410) 955-6153. Providers update this record themselves, so call before visiting.
How can I verify Marc C. Johnson's license?
NPPES lists Maryland license number 01350, as entered by the provider. Search the Maryland 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.