William R. Fellows, MD
NPI 1306840871 · Addiction Medicine (Internal Medicine) Physician · Biloxi, MS
William R. Fellows, MD is a Addiction Medicine (Internal Medicine) Physician organization in Biloxi, MS (NPI 1306840871).
Provider details
- NPI number
- 1306840871
- Entity type
- Organization
- Primary specialty
- Addiction Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- William Fellows, Owner(228) 388-7770
- License
- 08239 (MS)
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
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
- 2005-06-11
- Last updated
- 2008-09-10
Frequently asked questions
- What is William R. Fellows, MD's NPI number?
- William R. Fellows, MD's National Provider Identifier (NPI) is 1306840871, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is William R. Fellows, MD?
- William R. Fellows, MD is classified in the NPPES registry as Addiction Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is William R. Fellows, MD located?
- William R. Fellows, MD's practice location on file with NPPES is 180 Debuys Rd, Biloxi, MS 39531-4402.
- What is William R. Fellows, MD's phone number?
- The practice phone number listed in the NPPES registry for William R. Fellows, MD is (228) 388-7770.
- Who is the authorized official for William R. Fellows, MD?
- The authorized official listed on William R. Fellows, MD's NPPES record is William Fellows, Owner. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is William R. Fellows, MD's NPI active?
- Yes — William R. Fellows, MD's NPI (1306840871) is active in the NPPES registry as of the last update on 2008-09-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.