Marc Stephen Posner, M.D.
Family Medicine Physician · Baltimore, MD
Marc Stephen Posner, M.D. is a family medicine physician with a practice address in Baltimore, Maryland, and NPI 1114930211, issued on Aug 14, 2006. Check the license (Maryland D19640, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Marc Stephen Posner
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- D19640 MD
Self-reported in NPPES; status is on the state search - Practice location
- 1147 S Hanover St, Baltimore, MD 21230
- Phone
- (410) 752-5425
- Enumerated
- Aug 14, 2006
- Record last updated
- Dec 19, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (410) 625-9042
- Medicare enrollment
- Enrolled (PECOS I20110228000801); accepts Medicare assignment
- Medical or professional school
- University Of Maryland School Of Medicine, 1976
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 1,912 in Maryland → Look up another NPI →
Also registered at 1147 S Hanover St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Leslie Ebert, LCSWCClinical Social Worker1578629838
Verify Marc Stephen Posner in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D19640Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
24% fewer Medicare Part D claims than the average family medicine physician in 2024
2,678 Medicare Part D claims for 161 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium159 claims
- Trelegy Ellipta114 claims
- Albuterol Sulfate Hfa96 claims
- Lisinopril88 claims
- Diclofenac Sodium Er84 claims
- Metoprolol Succinate84 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.
Industry payments in 2024: $201.26
11 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 55,478 providers of this specialty with any payment received $902.55 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Marc Stephen Posner among 1,912 family medicine physician records in Maryland
Marc Stephen Posner, M.D. is one of 1,912 family medicine physician records with a practice address in Maryland. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 13% of them.
- NPI issued2006 · 13% of these records are older, 54% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated1976 · median 2004 among the 1,141 with a school on file
- Record last updated2007 · 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 207Q00000X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Family Medicine Physician providers in Maryland
There are 1,912 family medicine physician records in Maryland.
All 1,912 in Maryland → Every provider in Baltimore → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Howard Bassel, MDBaltimore, MD 212301417058264
- Jocelyn Hines, MDBaltimore, MD 212301801930839
- Allyson Lynch, MD, MPHBaltimore, MD 212301548720808
- Shreya PatelBaltimore, MD 212301033798012
- Damian Birchess, MDBaltimore, MD 212291770578544
- Joyce Evans, M.D.Baltimore, MD 212291164454005
- Stacy Garrett-RayBaltimore, MD 212291245269018
- Leonard Giuffreda, M.D.Baltimore, MD 212291629384581
Common questions
What is Marc Stephen Posner, M.D.'s NPI number?
Marc Stephen Posner, M.D.'s National Provider Identifier (NPI) is 1114930211, issued on Aug 14, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Marc Stephen Posner, M.D. located?
The NPPES record lists a practice address at 1147 S Hanover St, Baltimore, MD, 21230. Phone: (410) 752-5425. Providers update this record themselves, so call before visiting.
How can I verify Marc Stephen Posner, M.D.'s license?
NPPES lists Maryland license number D19640, 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 Marc Stephen Posner, M.D. prescribe under Medicare Part D?
In 2024, Marc Stephen Posner, M.D. had 2,678 Medicare Part D claims for 161 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.