Mary Hendrickson, PHD
NPI 1699755561 · Psychologist · Issaquah, WA
Enrolled with Medicare as Practitioner - Clinical Psychologist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Hendrickson, PHD is a Psychologist provider in Issaquah, WA (NPI 1699755561).
Provider details
- NPI number
- 1699755561
- Entity type
- Individual
- Primary specialty
- PsychologistBehavioral Health & Social Service Providers
- Credential
- PHD
- Sex
- Female
- Sole proprietor
- No
- License
- PY00002719 (WA)
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
20 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
- 2006-01-18
- Last updated
- 2025-10-03
- Certified
- 2025-10-03
Frequently asked questions
- What is Mary Hendrickson's NPI number?
- Mary Hendrickson's National Provider Identifier (NPI) is 1699755561, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Hendrickson's specialty?
- Mary Hendrickson is listed in the NPPES registry with a primary specialty of Psychologist (Behavioral Health & Social Service Providers).
- Where is Mary Hendrickson located?
- Mary Hendrickson's practice location on file with NPPES is 22500 Se 64th Pl Ste 230, Issaquah, WA 98027-8111.
- What is Mary Hendrickson's phone number?
- The practice phone number listed in the NPPES registry for Mary Hendrickson is (425) 409-6414.
- Does Mary Hendrickson accept Medicare?
- Mary Hendrickson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Hendrickson's NPI active?
- Yes — Mary Hendrickson's NPI (1699755561) is active in the NPPES registry as of the last update on 2025-10-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.