William Addison Warren, M.D.
Internal Medicine Physician · Laurel, MD
William Addison Warren, M.D. is an internal medicine physician with a practice address in Laurel, Maryland, and NPI 1669478285, issued on Jun 28, 2005. Check the license (Maryland D13916, as entered in NPPES) on the Maryland Board of Physicians; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- William Addison Warren
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- D13916 MD
Self-reported in NPPES; status is on the state search - Practice location
- 8871 Gorman Road, Laurel, MD 20723
- Phone
- (301) 498-3150
- Enumerated
- Jun 28, 2005
- Record last updated
- Jun 6, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (301) 490-2411
- Medicaid ID
- 411701800 MD
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 3,904 in Maryland → Look up another NPI →
Verify William Addison Warren in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D13916Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
William Addison Warren among 3,904 internal medicine physician records in Maryland
William Addison Warren, 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 not. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 91% newer
- In a Medicare fileNo · 77% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2016 · 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).
38 internal medicine physician records list a practice address in Laurel
They are 38 of the 2,372 NPPES records with a practice address in Laurel, and 3,904 internal medicine physician records in Maryland. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 3,904 in Maryland → Every provider in Laurel → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Timothy McClain, M.D.Laurel, MD 207231730185364
- Prema Siva, MDLaurel, MD 207231699722009
- Michael Baako, MDLaurel, MD 207241336245323
- Jeffrey Brown, M.D.Laurel, MD 207241518986132
- Jerry Hunter, M.D.Laurel, MD 207241134185762
- Sankaran Nayar, M.D.Cottage City, MD 207221770768459
- William Duboyce, MDMitchellville, MD 207211619976438
- Desmond Johnson, MD.Mitchellville, MD 207211104960616
Common questions
What is William Addison Warren, M.D.'s NPI number?
William Addison Warren, M.D.'s National Provider Identifier (NPI) is 1669478285, issued on Jun 28, 2005. An NPI identifies a provider in billing; it is not a license.
Where is William Addison Warren, M.D. located?
The NPPES record lists a practice address at 8871 Gorman Road, Laurel, MD, 20723. Phone: (301) 498-3150. Providers update this record themselves, so call before visiting.
How can I verify William Addison Warren, M.D.'s license?
NPPES lists Maryland license number D13916, 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.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.