William Mark Steinberg, MD
Gastroenterology Physician · Rockville, MD
William Mark Steinberg, MD is a gastroenterology physician with a practice address in Rockville, Maryland, and NPI 1962408054, issued on Jun 23, 2005. Check the license (Maryland D0046519, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- William Mark Steinberg
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- D0046519 MD
Self-reported in NPPES; status is on the state search - Practice location
- 1201 Seven Locks RD, Rockville, MD 20854
- Phone
- (301) 762-5020
- Enumerated
- Jun 23, 2005
- Record last updated
- May 16, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (301) 294-7569
- Medicaid ID
- 270611301 MD
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 505 in Maryland → Look up another NPI →
Also registered at 1201 Seven Locks RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Kelly Cowen, MDFamily Medicine Physician1225033731
- Carole Dean, LMTMassage Therapist1811350994
Verify William Mark Steinberg in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D0046519Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average gastroenterology physician in 2024
11 Medicare Part D claims, against an average of 811 among the 16,445 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.
William Mark Steinberg among 505 gastroenterology physician records in Maryland
William Mark Steinberg, MD is one of 505 gastroenterology physician records with a practice address in Maryland. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 84% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 68% of these records are
- Record last updated2012 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Maryland
There are 505 gastroenterology physician records in Maryland.
All 505 in Maryland → Every provider in Rockville → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Soonbok Woo, M.D.Rockville, MD 208541285672105
- Thomas Garvey III, MDRockville, MD 208521366501066
- Sanford Richman, MDNorth Bethesda, MD 208521154475697
- Michael Weinstein, M.D.Rockville, MD 208521881653012
- Soorya Aggarwal, DORockville, MD 208501649706193
- Brian Ciampa, M.D.Rockville, MD 208501912294463
- Scott Friedberg, MDRockville, MD 208501205363280
- Jeffrey Kim, M.D.Rockville, MD 208501366820409
Common questions
What is William Mark Steinberg, MD's NPI number?
William Mark Steinberg, MD's National Provider Identifier (NPI) is 1962408054, issued on Jun 23, 2005. An NPI identifies a provider in billing; it is not a license.
Where is William Mark Steinberg, MD located?
The NPPES record lists a practice address at 1201 Seven Locks RD, Rockville, MD, 20854. Phone: (301) 762-5020. Providers update this record themselves, so call before visiting.
How can I verify William Mark Steinberg, MD's license?
NPPES lists Maryland license number D0046519, 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 William Mark Steinberg, MD prescribe under Medicare Part D?
In 2024, William Mark Steinberg, MD had 11 Medicare Part D claims; the average among gastroenterology physician prescribers was 811. 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.