Gregory Mallis, PSY.D
NPI 1780022194 · Psychologist · Grand Rapids, MI
Enrolled with Medicare as Practitioner - Clinical Psychologist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Mallis, PSY.D is a Psychologist provider in Grand Rapids, MI (NPI 1780022194).
Provider details
- NPI number
- 1780022194
- Entity type
- Individual
- Primary specialty
- PsychologistBehavioral Health & Social Service Providers
- Credential
- PSY.D
- Sex
- Male
- Sole proprietor
- No
- License
- 6301015440 (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
13 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
- 2013-06-07
- Last updated
- 2013-06-07
Frequently asked questions
- What is Gregory Mallis's NPI number?
- Gregory Mallis's National Provider Identifier (NPI) is 1780022194, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Mallis's specialty?
- Gregory Mallis is listed in the NPPES registry with a primary specialty of Psychologist (Behavioral Health & Social Service Providers).
- Where is Gregory Mallis located?
- Gregory Mallis's practice location on file with NPPES is 1870 Leonard St Se, Grand Rapids, MI 49505-5650.
- What is Gregory Mallis's phone number?
- The practice phone number listed in the NPPES registry for Gregory Mallis is (616) 956-1122.
- Does Gregory Mallis accept Medicare?
- Gregory Mallis is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Mallis's NPI active?
- Yes — Gregory Mallis's NPI (1780022194) is active in the NPPES registry as of the last update on 2013-06-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.