Mark Stein, PHD
NPI 1588859144 · Clinical Psychologist · Seattle, WA
Enrolled with Medicare as Practitioner - Clinical Psychologist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Stein, PHD is a Clinical Psychologist provider in Seattle, WA (NPI 1588859144).
Provider details
- NPI number
- 1588859144
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PHD
- Sex
- Male
- Sole proprietor
- No
- License
- 071003089 (IL)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
18 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
Mailing address
Registry dates
- Enumerated
- 2007-09-07
- Last updated
- 2012-12-26
Frequently asked questions
- What is Mark Stein's NPI number?
- Mark Stein's National Provider Identifier (NPI) is 1588859144, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Stein's specialty?
- Mark Stein is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Mark Stein located?
- Mark Stein's practice location on file with NPPES is 4800 Sand Point Way Ne, Seattle, WA 98105-3901.
- What is Mark Stein's phone number?
- The practice phone number listed in the NPPES registry for Mark Stein is (206) 987-8450.
- Does Mark Stein accept Medicare?
- Mark Stein is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Stein's NPI active?
- Yes — Mark Stein's NPI (1588859144) is active in the NPPES registry as of the last update on 2012-12-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.