Ellen Marciniak, MD
Critical Care Medicine (Internal Medicine) Physician · Baltimore, MD
Ellen Marciniak, MD is a critical care medicine (internal medicine) physician with a practice address in Baltimore, Maryland, and NPI 1467643866, issued on Aug 9, 2007. Check the license (Maryland D74874, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Ellen Marciniak
- Credential
- MD
- Primary taxonomy
- Critical Care Medicine (Internal Medicine) Physician 207RC0200X
- License numbers
- D74874 MD
57.013558 OH
Self-reported in NPPES; status is on the state search - Practice location
- 22 S Greene St, Baltimore, MD 21201
- Phone
- (410) 328-1512
- Enumerated
- Aug 9, 2007
- Record last updated
- Sep 22, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (410) 328-0177
- Medicaid ID
- 494910200 MD
- Medicare enrollment
- Enrolled (PECOS I20140807001026); accepts Medicare assignment
- Medical or professional school
- University Of Illinois College Of Med (Chi/Peor/Rock/Chm-Urb), 2007
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest critical care medicine (internal medicine) physician records → All 212 in Maryland → Look up another NPI →
Also registered at 22 S Greene St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Ellen Marciniak in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D74874Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
48% fewer Medicare Part D claims than the average critical care medicine (internal medicine) physician in 2024
363 Medicare Part D claims for 68 beneficiaries, against an average of 696 among the 2,873 providers of this specialty who prescribed in Part D. Brand-name drugs were 47% of claims. 13 claims were for opioids.
Most prescribed
- Albuterol Sulfate Hfa42 claims
- Prednisone32 claims
- Fluticasone Propionate30 claims
- Trelegy Ellipta29 claims
- Breo Ellipta21 claims
- Mycophenolate Mofetil19 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.
Bills Medicare through 2 group practices
- Greater Baltimore Medical Center IncBaltimore, MD
- University OF Maryland Physicians PABaltimore, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ellen Marciniak among 212 critical care medicine (internal medicine) physician records in Maryland
Ellen Marciniak, MD is one of 212 critical care medicine (internal medicine) physician records with a practice address in Maryland. 86% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 40% of them.
- NPI issued2007 · 40% of these records are older, 49% newer
- In a Medicare fileYes · 86% of these records are
- In the CMS Doctors and Clinicians fileYes · 79% of these records are
- Graduated2007 · median 2005 among the 168 with a school on file
- Record last updated2014 · 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 207RC0200X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Critical Care Medicine (Internal Medicine) Physician providers in Maryland
There are 212 critical care medicine (internal medicine) physician records in Maryland.
All 212 in Maryland → Every provider in Baltimore → Critical Care Medicine (Internal Medicine) Physician nationwide →
The 8 critical care medicine (internal medicine) physician records with the nearest ZIP codes
- Marjan Bahador, MDBaltimore, MD 212011760605422
- Edward Britt, M.D.Baltimore, MD 212011912955469
- Renee Dixon, M.D.Baltimore, MD 212011174748743
- Jonathan Gottlieb, MDBaltimore, MD 212011821132119
- Nader Habashi, M.D.Baltimore, MD 212011164467957
- Jeffrey Hasday, M.D.Baltimore, MD 212011720034580
- Emmanuel Kyereme-Tuah, M.D.Baltimore, MD 212011295748580
- Paul McCarthy, MDBaltimore, MD 212011275576134
Common questions
What is Ellen Marciniak, MD's NPI number?
Ellen Marciniak, MD's National Provider Identifier (NPI) is 1467643866, issued on Aug 9, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Ellen Marciniak, MD located?
The NPPES record lists a practice address at 22 S Greene St, Baltimore, MD, 21201. Phone: (410) 328-1512. Providers update this record themselves, so call before visiting.
How can I verify Ellen Marciniak, MD's license?
NPPES lists Maryland license number D74874, 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 Ellen Marciniak, MD prescribe under Medicare Part D?
In 2024, Ellen Marciniak, MD had 363 Medicare Part D claims for 68 beneficiaries; the average among critical care medicine (internal medicine) physician prescribers was 696. 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.