William Allen, MD
NPI 1891016317 · Sleep Medicine (Internal Medicine) Physician · Southfield, MI
William Allen, MD is a Sleep Medicine (Internal Medicine) Physician provider in Southfield, MI (NPI 1891016317).
Provider details
- NPI number
- 1891016317
- Entity type
- Individual
- Primary specialty
- Sleep Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 4301035090 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
16 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
- 2010-06-18
- Last updated
- 2010-06-18
Frequently asked questions
- What is William Allen's NPI number?
- William Allen's National Provider Identifier (NPI) is 1891016317, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Allen's specialty?
- William Allen is listed in the NPPES registry with a primary specialty of Sleep Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is William Allen located?
- William Allen's practice location on file with NPPES is 24681 Northwestern Hwy, Southfield, MI 48075-2305.
- What is William Allen's phone number?
- The practice phone number listed in the NPPES registry for William Allen is (248) 304-0340.
- Is William Allen's NPI active?
- Yes — William Allen's NPI (1891016317) is active in the NPPES registry as of the last update on 2010-06-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.