What is William Ryan's NPI number?

William Ryan's National Provider Identifier (NPI) is 1629122544, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is William Ryan's specialty?

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

Where is William Ryan located?

William Ryan's practice location on file with NPPES is 1648 Ellis St, Bozeman, MT 59715.

What is William Ryan's phone number?

The practice phone number listed in the NPPES registry for William Ryan is (406) 586-9580.

Is William Ryan's NPI active?

Yes — William Ryan's NPI (1629122544) is active in the NPPES registry as of the last update on 2026-05-03.

IndividualActive

William Ryan, PHD

NPI 1629122544 · Clinical Psychologist · Bozeman, MT

William Ryan, PHD is a Clinical Psychologist provider in Bozeman, MT (NPI 1629122544).

Provider details

NPI number: 1629122544
Entity type: Individual
Primary specialty: Clinical PsychologistBehavioral Health & Social Service Providers
Credential: PHD
Sex: Male
Sole proprietor: No
License: 219 (MT)

Specialties & taxonomies

Clinical PsychologistPrimary103TC0700XLicense 219 (MT)
Behavioral Health & Social Service Providers

Profile Score

Detailed profile(90/100 index)

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

Registry tenure38% of score
19 yrs 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

1648 Ellis St

Suite 302

Bozeman, MT 59715

Phone: (406) 586-9580

Fax: (406) 587-1513

Street-level locationGet directions

More MT providers

Mailing address