Mark Callahan, SLP
NPI 1215194915 · Speech-Language Pathologist · Pittsburgh, PA
Mark Callahan, SLP is a Speech-Language Pathologist provider in Pittsburgh, PA (NPI 1215194915).
Provider details
- NPI number
- 1215194915
- Entity type
- Individual
- Primary specialty
- Speech-Language PathologistSpeech, Language and Hearing Service Providers
- Credential
- SLP
- Sex
- Male
- Sole proprietor
- Yes
- License
- SL003238L (PA)
Specialties & taxonomies
Speech, Language and Hearing 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
Registry dates
- Enumerated
- 2008-05-20
- Last updated
- 2008-05-20
Frequently asked questions
- What is Mark Callahan's NPI number?
- Mark Callahan's National Provider Identifier (NPI) is 1215194915, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Callahan's specialty?
- Mark Callahan is listed in the NPPES registry with a primary specialty of Speech-Language Pathologist (Speech, Language and Hearing Service Providers).
- Where is Mark Callahan located?
- Mark Callahan's practice location on file with NPPES is 6000 Babcock Blvd, Pittsburgh, PA 15237-2564.
- What is Mark Callahan's phone number?
- The practice phone number listed in the NPPES registry for Mark Callahan is (412) 369-5150.
- Is Mark Callahan's NPI active?
- Yes — Mark Callahan's NPI (1215194915) is active in the NPPES registry as of the last update on 2008-05-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.