Mark Lawrence Callahan, SLP
Speech-Language Pathologist · Pittsburgh, PA
Mark Lawrence Callahan, SLP is a speech-language pathologist with a practice address in Pittsburgh, Pennsylvania, and NPI 1215194915, issued on May 20, 2008. Check the license (Pennsylvania SL003238L, as entered in NPPES) with the Pennsylvania board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Mark Lawrence Callahan
- Credential
- SLP
- Primary taxonomy
- Speech-Language Pathologist 235Z00000X
- License number
- SL003238L PA
Self-reported in NPPES; status is on the state search - Practice location
- 6000 Babcock Blvd, Pittsburgh, PA 15237
- Phone
- (412) 369-5150
- Enumerated
- May 20, 2008
- Record last updated
- May 20, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (412) 369-5163
- Entity
- Type 1 · individual
Also registered at 6000 Babcock Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Pamela Daniel, CCC-SLPSpeech-Language Pathologist1396902763
- Jennifer Flickinger, OTR/LOccupational Therapist1326206988
- Oleh Hodowanec, OTR/LOccupational Therapist1366682569
- Nancy Kammersell, MACCCSLPSpeech-Language Pathologist1184864555
- Michele Majcher, LCSWClinical Social Worker1043451172
- Kristin Martin, MS, CCC-SLPSpeech-Language Pathologist1184867657
Verify Mark Lawrence Callahan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Pennsylvania board licenses this profession
Search for license SL003238LCheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
575 speech-language pathologist records list a practice address in Pittsburgh
They are 575 of the 28,866 NPPES records with a practice address in Pittsburgh, and 7,128 speech-language pathologist records in Pennsylvania. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 575 in Pittsburgh → All 7,128 in Pennsylvania → Every provider in Pittsburgh →
Other speech-language pathologist records in Pennsylvania
- Karleigh AaronIndiana, PA1346011418
- Lee Aaron, CCC.SLPPhiladelphia, PA1336311984
- Brooke Abbonizio, CCC-SLPAmbler, PA1629556378
- Kylie Abbott, SLPKingston, PA1477943538
- Erin Abdul-AlPittsburgh, PA1053924787
- Sultana Abdur RaheemPhiladelphia, PA1093532087
- Elizabeth Aber, MS, CCC-SLPPittsburgh, PA1750940458
- Catherine Abild, SLPDrums, PA1588183685
- Lynn Ables, SPEECH THERAPISTAltoona, PA1831739556
- Ilissa Abovitz, M.S. CCC-SLPSouthampton, PA1487325361
Common questions
What is Mark Lawrence Callahan, SLP's NPI number?
Mark Lawrence Callahan, SLP's National Provider Identifier (NPI) is 1215194915, issued on May 20, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Mark Lawrence Callahan, SLP located?
The NPPES record lists a practice address at 6000 Babcock Blvd, Pittsburgh, PA, 15237. Phone: (412) 369-5150. Providers update this record themselves, so call before visiting.
How can I verify Mark Lawrence Callahan, SLP's license?
NPPES lists Pennsylvania license number SL003238L, as entered by the provider. Search the Pennsylvania board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.