Peter J. Callahan, PLLC
NPI 1669644852 · Clinical Social Worker · Martinsburg, WV
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Peter J. Callahan, PLLC is a Clinical Social Worker organization in Martinsburg, WV (NPI 1669644852).
Provider details
- NPI number
- 1669644852
- Entity type
- Organization
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Organization subpart
- No
- Authorized official
- Peter Callahan, Psychotherapist(304) 886-4118
- License
- DP00941942 (WV)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
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
Mailing address
Other names (DBA / former)
- Other name
- Callahan, PLLC
Registry dates
- Enumerated
- 2008-03-27
- Last updated
- 2015-03-03
Frequently asked questions
- What is Peter J. Callahan, PLLC's NPI number?
- Peter J. Callahan, PLLC's National Provider Identifier (NPI) is 1669644852, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Peter J. Callahan, PLLC?
- Peter J. Callahan, PLLC is classified in the NPPES registry as Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Peter J. Callahan, PLLC located?
- Peter J. Callahan, PLLC's practice location on file with NPPES is 1020 Winchester Ave, Martinsburg, WV 25401-1650.
- What is Peter J. Callahan, PLLC's phone number?
- The practice phone number listed in the NPPES registry for Peter J. Callahan, PLLC is (304) 886-4118.
- Does Peter J. Callahan, PLLC accept Medicare?
- Peter J. Callahan, PLLC is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Peter J. Callahan, PLLC?
- The authorized official listed on Peter J. Callahan, PLLC's NPPES record is Peter Callahan, Psychotherapist. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Peter J. Callahan, PLLC's NPI active?
- Yes — Peter J. Callahan, PLLC's NPI (1669644852) is active in the NPPES registry as of the last update on 2015-03-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.