OrganizationActive
William E. Clack M.D.
NPI 1427217090 · Specialist · Elmira, NY
William E. Clack M.D. is a Specialist organization in Elmira, NY (NPI 1427217090).
Provider details
- NPI number
- 1427217090
- Entity type
- Organization
- Primary specialty
- SpecialistOther Service Providers
- Organization subpart
- No
- Authorized official
- William Clack, Owner(607) 733-3631
- License
- 118121 (NY)
Specialties & taxonomies
Other Service Providers
Profile Score
Detailed profile(87/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
18 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
447 E Water St
Elmira, NY 14901-3410
Phone: (607) 733-3631
Fax: (607) 733-5432
Street-level locationGet directions
Mailing address
447 E Water St
Elmira, NY 14901-3410
Registry dates
- Enumerated
- 2008-06-08
- Last updated
- 2008-06-08
Frequently asked questions
- What is William E. Clack M.D.'s NPI number?
- William E. Clack M.D.'s National Provider Identifier (NPI) is 1427217090, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is William E. Clack M.D.?
- William E. Clack M.D. is classified in the NPPES registry as Specialist (Other Service Providers).
- Where is William E. Clack M.D. located?
- William E. Clack M.D.'s practice location on file with NPPES is 447 E Water St, Elmira, NY 14901-3410.
- What is William E. Clack M.D.'s phone number?
- The practice phone number listed in the NPPES registry for William E. Clack M.D. is (607) 733-3631.
- Who is the authorized official for William E. Clack M.D.?
- The authorized official listed on William E. Clack M.D.'s NPPES record is William Clack, Owner. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is William E. Clack M.D.'s NPI active?
- Yes — William E. Clack M.D.'s NPI (1427217090) is active in the NPPES registry as of the last update on 2008-06-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.