What is Sean Donnelly's NPI number?

Sean Donnelly's National Provider Identifier (NPI) is 1255229530, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Sean Donnelly's specialty?

Sean Donnelly is listed in the NPPES registry with a primary specialty of Peer Specialist (Other Service Providers).

Where is Sean Donnelly located?

Sean Donnelly's practice location on file with NPPES is 114 S Delaware St, San Mateo, CA 94401-3222.

What is Sean Donnelly's phone number?

The practice phone number listed in the NPPES registry for Sean Donnelly is (650) 579-7881.

Is Sean Donnelly's NPI active?

Yes — Sean Donnelly's NPI (1255229530) is active in the NPPES registry as of the last update on 2025-06-25.

IndividualActive

Sean Donnelly, PEER SUPPORT SPECIAL

NPI 1255229530 · Peer Specialist · San Mateo, CA

Sean Donnelly, PEER SUPPORT SPECIAL is a Peer Specialist provider in San Mateo, CA (NPI 1255229530).

Provider details

NPI number: 1255229530
Entity type: Individual
Primary specialty: Peer SpecialistOther Service Providers
Credential: PEER SUPPORT SPECIAL
Sex: Male
Sole proprietor: No
License: MPSS-MKGVZO (CA)

Specialties & taxonomies

Peer SpecialistPrimary175T00000XLicense MPSS-MKGVZO (CA)
Other Service Providers

Profile Score

Established profile(54/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure38% of score
1 yr 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

114 S Delaware St

San Mateo, CA 94401-3222

Phone: (650) 579-7881

Street-level locationGet directions

More CA providers

Mailing address