Mary Callahan, L.C.S.W.
NPI 1164877643 · Clinical Social Worker · Bronx, NY
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Callahan, L.C.S.W. is a Clinical Social Worker provider in Bronx, NY (NPI 1164877643).
Provider details
- NPI number
- 1164877643
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- L.C.S.W.
- Sex
- Female
- Sole proprietor
- Yes
- License
- 056639-1 (NY)
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
10 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
310 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) |
|---|---|---|
| Group Psychotherapy90853 | 310 | $22 |
Typical Medicare-allowed amounts for these services range $22–$22 (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
- 2016-05-03
- Last updated
- 2016-05-03
Frequently asked questions
- What is Mary Callahan's NPI number?
- Mary Callahan's National Provider Identifier (NPI) is 1164877643, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Callahan's specialty?
- Mary Callahan is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Mary Callahan located?
- Mary Callahan's practice location on file with NPPES is 953 Southern Blvd, Bronx, NY 10459-3428.
- What is Mary Callahan's phone number?
- The practice phone number listed in the NPPES registry for Mary Callahan is (718) 860-2994.
- Does Mary Callahan accept Medicare?
- Mary Callahan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Callahan's NPI active?
- Yes — Mary Callahan's NPI (1164877643) is active in the NPPES registry as of the last update on 2016-05-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.