What is Theodore Siok's NPI number?

Theodore Siok's National Provider Identifier (NPI) is 1558212720, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Theodore Siok's specialty?

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

Where is Theodore Siok located?

Theodore Siok's practice location on file with NPPES is 1422 6th St Apt 305, Santa Monica, CA 90401-2545.

What is Theodore Siok's phone number?

The practice phone number listed in the NPPES registry for Theodore Siok is (310) 913-8929.

Is Theodore Siok's NPI active?

Yes — Theodore Siok's NPI (1558212720) is active in the NPPES registry as of the last update on 2026-02-04.

IndividualActive

Theodore Siok

NPI 1558212720 · Peer Specialist · Santa Monica, CA

Theodore Siok is a Peer Specialist provider in Santa Monica, CA (NPI 1558212720).

Provider details

NPI number: 1558212720
Entity type: Individual
Primary specialty: Peer SpecialistOther Service Providers
Sex: Male
Sole proprietor: No
License: MPSS-CJMEFU (CA)

Specialties & taxonomies

Peer SpecialistPrimary175T00000XLicense MPSS-CJMEFU (CA)
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
Under 1 yr in 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

1422 6th St Apt 305

Santa Monica, CA 90401-2545

Phone: (310) 913-8929

Street-level locationGet directions

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Mailing address