IndividualActive
John Shack, PH.D.
NPI 1942478706 · Clinical Psychologist · Douglas, MI
John Shack, PH.D. is a Clinical Psychologist provider in Douglas, MI (NPI 1942478706).
Provider details
- NPI number
- 1942478706
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PH.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 6301011374 (MI)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Detailed profile(88/100 index)
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
713 Wilderness Dr.
Douglas, MI 49406-0140
Phone: (269) 857-8644
Fax: (269) 857-8644
Street-level locationGet directions
Mailing address
713 Wilderness Drive
Douglas, MI 49406-0140
Registry dates
- Enumerated
- 2008-02-14
- Last updated
- 2008-02-14
Frequently asked questions
- What is John Shack's NPI number?
- John Shack's National Provider Identifier (NPI) is 1942478706, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Shack's specialty?
- John Shack is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is John Shack located?
- John Shack's practice location on file with NPPES is 713 Wilderness Dr., Douglas, MI 49406-0140.
- What is John Shack's phone number?
- The practice phone number listed in the NPPES registry for John Shack is (269) 857-8644.
- Is John Shack's NPI active?
- Yes — John Shack's NPI (1942478706) is active in the NPPES registry as of the last update on 2008-02-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.