Beth R. Marcus, M.D.
Internal Medicine Physician · Baltimore, MD
Beth R. Marcus, M.D. is an internal medicine physician with a practice address in Baltimore, Maryland, and NPI 1093017659, issued on Dec 2, 2010. Check the license (Maryland 00055284, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Beth R. Marcus
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 00055284 MD
Self-reported in NPPES; status is on the state search - Practice location
- 2835 Smith Ave Ste 207, Baltimore, MD 21209
- Phone
- (410) 358-4243
- Enumerated
- Dec 2, 2010
- Record last updated
- Oct 21, 2024
- Fax
- (410) 358-1016
- Medicare enrollment
- Enrolled (PECOS I20210216001155); accepts Medicare assignment
- Medical or professional school
- University Of Cincinnati College Of Medicine, 1991
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 3,904 in Maryland → Look up another NPI →
Also registered at 2835 Smith Ave Ste 207
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Beth R. Marcus in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license 00055284Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
80% fewer Medicare Part D claims than the average internal medicine physician in 2024
646 Medicare Part D claims for 97 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims.
Most prescribed
- Levothyroxine Sodium61 claims
- Atorvastatin Calcium60 claims
- Amlodipine Besylate35 claims
- Mirtazapine34 claims
- Sertraline Hcl20 claims
- Metoprolol Tartrate19 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
- Aaron D Goldberg MD ChtdBaltimore, MD
- Select Rehabilitation, LLCGlenview, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Beth R. Marcus among 3,904 internal medicine physician records in Maryland
Beth R. Marcus, M.D. is one of 3,904 internal 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. Its NPI, issued in 2010, is newer than 64% of them.
- NPI issued2010 · 64% of these records are older, 33% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1991 · median 2003 among the 2,445 with a school on file
- Record last updated2024 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1,278 internal medicine physician records list a practice address in Baltimore
They are 1,278 of the 35,183 NPPES records with a practice address in Baltimore, and 3,904 internal medicine physician records in Maryland.
All 3,904 in Maryland → Every provider in Baltimore → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Kandasamy Ambalavanar, MDBaltimore, MD 212091477647097
- Amy Freedman, MDBaltimore, MD 212091265535223
- Stephen Glasser, M.D.Baltimore, MD 212091912073214
- Aaron Goldberg, MDBaltimore, MD 212091104836345
- Howard Goldstein, M.D.Baltimore, MD 212091790747251
- Joyce Gross, M.D.Baltimore, MD 212091073672887
- Harry Kaplan, MDBaltimore, MD 212091538124631
- Michael Levin, MDBaltimore, MD 212091902906753
Common questions
What is Beth R. Marcus, M.D.'s NPI number?
Beth R. Marcus, M.D.'s National Provider Identifier (NPI) is 1093017659, issued on Dec 2, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Beth R. Marcus, M.D. located?
The NPPES record lists a practice address at 2835 Smith Ave Ste 207, Baltimore, MD, 21209. Phone: (410) 358-4243. Providers update this record themselves, so call before visiting.
How can I verify Beth R. Marcus, M.D.'s license?
NPPES lists Maryland license number 00055284, 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 Beth R. Marcus, M.D. prescribe under Medicare Part D?
In 2024, Beth R. Marcus, M.D. had 646 Medicare Part D claims for 97 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.