Marc Nelson, MD
Emergency Medicine Physician · Baltimore, MD
Marc Nelson, MD is an emergency medicine physician with a practice address in Baltimore, Maryland, and NPI 1922628593, issued on Apr 23, 2020. Check the license (Maryland D20353, as entered in NPPES) on the Maryland Board of Physicians; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Marc Nelson
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- D20353 MD
Self-reported in NPPES; status is on the state search - Practice location
- 400 E Pratt St FL 8, Baltimore, MD 21202
- Phone
- (443) 726-2551
- Enumerated
- Apr 23, 2020
- Record last updated
- Apr 23, 2020 (not updated in 6 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,190 in Maryland → Look up another NPI →
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Verify Marc Nelson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D20353Check 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 Nelson among 1,190 emergency medicine physician records in Maryland
Marc Nelson, MD is one of 1,190 emergency medicine physician records with a practice address in Maryland. 77% 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 2020, is newer than 91% of them.
- NPI issued2020 · 91% of these records are older, 6% newer
- In a Medicare fileNo · 77% of these records are
- In the CMS Doctors and Clinicians fileNo · 48% of these records are
- Record last updated2020 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
505 emergency medicine physician records list a practice address in Baltimore
They are 505 of the 35,183 NPPES records with a practice address in Baltimore, and 1,190 emergency medicine physician records in Maryland. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 1,190 in Maryland → Every provider in Baltimore → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Kevin Babb, MDBaltimore, MD 212021780729558
- Amy Donato MillerBaltimore, MD 212021578784401
- Suzanne Doyon, MDBaltimore, MD 212021477698264
- Keischa Glenn, DOBaltimore, MD 212021356380406
- Terri Green, M.D.Baltimore, MD 212021215915418
- Matthew Grzywinski, MDBaltimore, MD 212021619534658
- Scott McPherson, M.DBaltimore, MD 212021003851684
- Theresa Tassey, M.D.Baltimore, MD 212021629416672
Common questions
What is Marc Nelson, MD's NPI number?
Marc Nelson, MD's National Provider Identifier (NPI) is 1922628593, issued on Apr 23, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Marc Nelson, MD located?
The NPPES record lists a practice address at 400 E Pratt St FL 8, Baltimore, MD, 21202. Phone: (443) 726-2551. Providers update this record themselves, so call before visiting.
How can I verify Marc Nelson, MD's license?
NPPES lists Maryland license number D20353, 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.
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.