Peter Callahan, LGSW
NPI 1205834389 · Clinical Social Worker · Martinsburg, WV
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Peter Callahan, LGSW is a Clinical Social Worker provider in Martinsburg, WV (NPI 1205834389).
Provider details
- NPI number
- 1205834389
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LGSW
- Sex
- Male
- Sole proprietor
- No
- License
- DP09966148 (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 tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
352 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Psychotherapy, 1 Hour90837 | 335 | $108 |
| Psychiatric Diagnostic Evaluation90791 | 17 | $124 |
Typical Medicare-allowed amounts for these services range $108–$124 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-07-12
- Last updated
- 2019-11-18
Frequently asked questions
- What is Peter Callahan's NPI number?
- Peter Callahan's National Provider Identifier (NPI) is 1205834389, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Peter Callahan's specialty?
- Peter Callahan is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Peter Callahan located?
- Peter Callahan's practice location on file with NPPES is 1020 Winchester Ave, Martinsburg, WV 25401-1650.
- What is Peter Callahan's phone number?
- The practice phone number listed in the NPPES registry for Peter Callahan is (304) 886-4118.
- Does Peter Callahan accept Medicare?
- Peter Callahan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Peter Callahan's NPI active?
- Yes — Peter Callahan's NPI (1205834389) is active in the NPPES registry as of the last update on 2019-11-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.