William Warren, M.D.
NPI 1669478285 · Internal Medicine Physician · Laurel, MD
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Warren, M.D. is a Internal Medicine Physician provider in Laurel, MD (NPI 1669478285).
Provider details
- NPI number
- 1669478285
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- D13916 (MD)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
21 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-06-28
- Last updated
- 2016-06-06
Frequently asked questions
- What is William Warren's NPI number?
- William Warren's National Provider Identifier (NPI) is 1669478285, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Warren's specialty?
- William Warren is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Warren located?
- William Warren's practice location on file with NPPES is 8871 Gorman Road, Laurel, MD 20723.
- What is William Warren's phone number?
- The practice phone number listed in the NPPES registry for William Warren is (301) 498-3150.
- Does William Warren accept Medicare?
- William Warren is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Warren's NPI active?
- Yes — William Warren's NPI (1669478285) is active in the NPPES registry as of the last update on 2016-06-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.