DR. WILLIAM L PARKER III PHD
NPI 1093926198
Psychologist - Counseling in Grand Rapids, MI
About Dr. William L Parker Iii Phd NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. WILLIAM L PARKER III PHD (NPI 1093926198) is an individual counseling provider in Grand Rapids, Michigan, licensed in Michigan (6301007243) and active in the NPI registry since May 2007. He is enrolled in Medicare PECOS and is a graduate of Other (1987).
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Other Identifiers 1
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
Dr. William L Parker Iii Phd 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 William Parker reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Grand Rapids, MI 49546
- Reassigned Medicare billing, Michigan enrollment
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Other Providers at the Same Location NPPES 4
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
GRAND RAPIDS, MI 49546
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 William Parker's NPI number?
The NPI number for William Parker is 1093926198. It was assigned to this individual provider in the NPPES registry on May 24, 2007. The provider is also known as Dr. William L Parker Phd.
Where is William Parker located?
William Parker practices at 2894 Thornapple River Dr SE, Grand Rapids, MI 49546. The listed phone number is (616) 285-6080.
What is William Parker's specialty?
The primary specialty registered for this NPI is Psychologist, specializing in Counseling, with taxonomy code 103TC1900X.
Is William Parker enrolled in Medicare?
Yes. William Parker 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 William Parker's services?
According to the CMS Revalidation Reassignment List (October 2026 release), William Parker reassigns Medicare benefits to William Parker Phd PC (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 William Parker's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does William Parker accept?
Health plans from Blue Care Network of Michigan and Blue Cross Blue Shield of Michigan Mutual Insurance Company list William Parker 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 William Parker was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.