Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Mr. Sean P Donnelly, PEERSUPPORTSPECIAL

Individual provider Peer Specialist · NPI 1255229530

Mr. Sean P Donnelly, PEERSUPPORTSPECIAL is a Peer Specialist in San Mateo, California. Licensed in California. Registered with an NPI since 2025.

Licensed in
CA
In the registry since
2025
Specialties on file
2

Practice location Address checks out

416 2nd Ave
San Mateo, CA 94401-3205
Phone: (650) 579-7881
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Addiction (Substance Use Disorder) Counselor (primary) Taxonomy 101YA0400X · Licence SUDRCI25906 (CA)
Peer Specialist Taxonomy 175T00000X · Licence MPSS-MKGVZO (CA)

Record details

NPI number1255229530
Entity typeIndividual (Type 1)
GenderMale
Credentials PEERSUPPORTSPECIAL
Sole proprietorNo
NPI enumeratedJune 25, 2025
Last updated in NPPESJune 17, 2026
Certification dateJune 17, 2026

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