What is Kai Ruderian's NPI number?

Kai Ruderian's National Provider Identifier (NPI) is 1356111025, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Kai Ruderian's specialty?

Kai Ruderian is listed in the NPPES registry with a primary specialty of Psychologist (Behavioral Health & Social Service Providers).

Where is Kai Ruderian located?

Kai Ruderian's practice location on file with NPPES is 112 Water St Ste 400, Boston, MA 02109-4211.

What is Kai Ruderian's phone number?

The practice phone number listed in the NPPES registry for Kai Ruderian is (617) 221-3659.

Is Kai Ruderian's NPI active?

Yes — Kai Ruderian's NPI (1356111025) is active in the NPPES registry as of the last update on 2026-05-26.

IndividualActive

Kai Ruderian, PHD

NPI 1356111025 · Psychologist · Boston, MA

Kai Ruderian, PHD is a Psychologist provider in Boston, MA (NPI 1356111025).

Provider details

NPI number: 1356111025
Entity type: Individual
Primary specialty: PsychologistBehavioral Health & Social Service Providers
Credential: PHD
Sex: Male
Sole proprietor: Yes

Specialties & taxonomies

PsychologistPrimary103T00000X
Behavioral Health & Social Service Providers

Profile Score

Established profile(51/100 index)

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

Registry tenure38% of score
2 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

112 Water St Ste 400

Boston, MA 02109-4211

Phone: (617) 221-3659

Street-level locationGet directions

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Mailing address