What is Mark Probasco's NPI number?

Mark Probasco's National Provider Identifier (NPI) is 1285357871, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Mark Probasco's specialty?

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

Where is Mark Probasco located?

Mark Probasco's practice location on file with NPPES is 10001 County Farm Rd, Riverside, CA 92503-3507.

What is Mark Probasco's phone number?

The practice phone number listed in the NPPES registry for Mark Probasco is (951) 358-4290.

Is Mark Probasco's NPI active?

Yes — Mark Probasco's NPI (1285357871) is active in the NPPES registry as of the last update on 2026-04-26.

IndividualActive

Mark Probasco

NPI 1285357871 · Peer Specialist · Riverside, CA

Mark Probasco is a Peer Specialist provider in Riverside, CA (NPI 1285357871).

Provider details

NPI number: 1285357871
Entity type: Individual
Primary specialty: Peer SpecialistOther Service Providers
Sex: Male
Sole proprietor: Yes

Specialties & taxonomies

Peer SpecialistPrimary175T00000X
Other Service Providers

Profile Score

Established profile(53/100 index)

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

Registry tenure38% of score
3 yrs in NPPES registry
Profile completeness38% of score
83% 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

10001 County Farm Rd

Riverside, CA 92503-3507

Phone: (951) 358-4290

Street-level locationGet directions

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Mailing address