GREGORY V MALLIS PSY.D
NPI 1780022194
Psychologist in Grand Rapids, MI
About Gregory V Mallis Psy.d NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GREGORY V MALLIS PSY.D (NPI 1780022194) is an individual psychologist in Grand Rapids, Michigan, licensed in Michigan (6301015440) and active in the NPI registry since June 2013. He is enrolled in Medicare PECOS and is a graduate of Other (2012).
NPPES Registry Identity
Specialties & Licenses
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Gregory V Mallis Psy.d is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show Gregory Mallis reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Grand Rapids, MI 49548
- Reassigned Medicare billing, Michigan enrollment
- 135 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Gregory Mallis's NPI number?
The NPI number for Gregory Mallis is 1780022194. It was assigned to this individual provider in the NPPES registry on June 7, 2013.
Where is Gregory Mallis located?
Gregory Mallis practices at 1870 Leonard St SE, Grand Rapids, MI 49505. The listed phone number is (616) 956-1122.
What is Gregory Mallis's specialty?
The primary specialty registered for this NPI is Psychologist with taxonomy code 103T00000X.
Is Gregory Mallis enrolled in Medicare?
Yes. Gregory Mallis is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for Gregory Mallis's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Gregory Mallis reassigns Medicare benefits to Pine Rest Christian Mental Health Services (Grand Rapids, MI). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Gregory Mallis's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Gregory Mallis accept?
Health plans from Ambetter Health, Ambetter from Buckeye Health Plan, Ambetter from Meridian, Blue Care Network of Michigan and Blue Cross Blue Shield of Michigan Mutual Insurance Company and 1 other insurer list Gregory Mallis as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Gregory Mallis was last updated on June 7, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.