Steven Griffioen, PSY.D.
NPI 1356440994 · Clinical Psychologist · Grand Rapids, MI
Enrolled with Medicare as Practitioner - Clinical Psychologist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Steven Griffioen, PSY.D. is a Clinical Psychologist provider in Grand Rapids, MI (NPI 1356440994).
Provider details
- NPI number
- 1356440994
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PSY.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 6301009482 (MI)
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
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
Mailing address
Registry dates
- Enumerated
- 2006-09-21
- Last updated
- 2007-07-08
Frequently asked questions
- What is Steven Griffioen's NPI number?
- Steven Griffioen's National Provider Identifier (NPI) is 1356440994, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Steven Griffioen's specialty?
- Steven Griffioen is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Steven Griffioen located?
- Steven Griffioen's practice location on file with NPPES is 468 Kinney Ave Nw, Grand Rapids, MI 49534-4509.
- What is Steven Griffioen's phone number?
- The practice phone number listed in the NPPES registry for Steven Griffioen is (616) 735-5491.
- Does Steven Griffioen accept Medicare?
- Steven Griffioen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Steven Griffioen's NPI active?
- Yes — Steven Griffioen's NPI (1356440994) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.