IndividualActive
William Ellis, M.D.
NPI 1821025792 · Emergency Medicine Physician · Butte, MT
William Ellis, M.D. is a Emergency Medicine Physician provider in Butte, MT (NPI 1821025792).
Provider details
- NPI number
- 1821025792
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 3763 (MT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(91/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 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
400 S Clark St
Butte, MT 59701-2328
Phone: (406) 723-2500
Street-level locationGet directions
Mailing address
401 S Alabama Street
Butte, MT 59701
Registry dates
- Enumerated
- 2006-06-27
- Last updated
- 2007-07-08
Frequently asked questions
- What is William Ellis's NPI number?
- William Ellis's National Provider Identifier (NPI) is 1821025792, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Ellis's specialty?
- William Ellis is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Ellis located?
- William Ellis's practice location on file with NPPES is 400 S Clark St, Butte, MT 59701-2328.
- What is William Ellis's phone number?
- The practice phone number listed in the NPPES registry for William Ellis is (406) 723-2500.
- Is William Ellis's NPI active?
- Yes — William Ellis's NPI (1821025792) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.