Marrissa Leigh Baker, M.D.
Emergency Medicine Physician · Baltimore, MD
Marrissa Leigh Baker, M.D. is an emergency medicine physician with a practice address in Baltimore, Maryland, and NPI 1669771986, issued on Mar 25, 2011. Check the license (Maryland D0079093, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Marrissa Leigh Baker
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- D0079093 MD
MD462521 PA
Self-reported in NPPES; status is on the state search - Practice location
- Johns Hopkins University School OF Medicine, Baltimore, MD 21287
- Phone
- (410) 955-5107
- Enumerated
- Mar 25, 2011
- Record last updated
- Oct 13, 2017 (not updated in 9 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20150812008570); accepts Medicare assignment
- Medical or professional school
- Washington University School Of Medicine, 2011
- Entity
- Type 1 · individual
Also registered at Johns Hopkins University School OF Medicine
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Marrissa Leigh Baker in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D0079093Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
92% fewer Medicare Part D claims than the average emergency medicine physician in 2024
17 Medicare Part D claims for 11 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
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.
Bills Medicare through one group practice
- Cep America LLCBaltimore, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (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.
All 505 in Baltimore → All 1,190 in Maryland → Every provider in Baltimore →
Other emergency medicine physician records in Maryland
- Kara AbarcarBaltimore, MD1285195123
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- John Abraham, M.D.Germantown, MD1225394786
- Michael Abraham, MDBaltimore, MD1316081557
- Elias Abras, MDBaltimore, MD1033156856
- Alexander Achenbach, MDJb Andrews, MD1841930179
- Ifeoluwa Adabonyan, M.D.Cumberland, MD1033556675
- Omoyemi Adebayo, M.D.Glen Burnie, MD1063788842
- Leon Adelman, M.D.Bowie, MD1962649616
- Subarna Adhikari, M.D.Easton, MD1780207498
Common questions
What is Marrissa Leigh Baker, M.D.'s NPI number?
Marrissa Leigh Baker, M.D.'s National Provider Identifier (NPI) is 1669771986, issued on Mar 25, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Marrissa Leigh Baker, M.D. located?
The NPPES record lists a practice address at Johns Hopkins University School OF Medicine, Baltimore, MD, 21287. Phone: (410) 955-5107. Providers update this record themselves, so call before visiting.
How can I verify Marrissa Leigh Baker, M.D.'s license?
NPPES lists Maryland license number D0079093, 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 Marrissa Leigh Baker, M.D. prescribe under Medicare Part D?
In 2024, Marrissa Leigh Baker, M.D. had 17 Medicare Part D claims for 11 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.