WILLIAM PARKER PHD PC
NPI 1821339250
Psychologist - Clinical in Grand Rapids, MI

Q: What is William Parker Phd PC's NPI number?

The NPI number for William Parker Phd PC is 1821339250. It was assigned to this organization in the NPPES registry on March 11, 2013.

Q: What is William Parker Phd PC's specialty?

The primary specialty registered for this NPI is Psychologist, specializing in Clinical, with taxonomy code 103TC0700X.

Active since March 11, 2013

2894 THORNAPPLE RIVER DR SE, GRAND RAPIDS, MI 49546(616) 285-6080(616) 285-5466 Get Directions Write a Review

NPPES record last updated: March 11, 2013. Verified against the NPPES registry weekly; last sync: October 18, 2026.

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About William Parker Phd Pc NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

WILLIAM PARKER PHD PC (NPI 1821339250) is a healthcare organization registered as a clinical in Grand Rapids, Michigan and active in the NPI registry since March 2013. The organization lists William L Parker, Owner, as its authorized official.

NPPES Registry Identity

NPI1821339250

Entity TypeOrganization

Primary Taxonomy103TC0700X

Legal Business NameWILLIAM PARKER PHD PC

Location Address2894 THORNAPPLE RIVER DR SEGrand Rapids, MI 49546-6857

Mailing Address2894 Thornapple River Dr SeGrand Rapids, MI 49546-6857 · (616) 285-6080 · Fax (616) 285-5466

Phone(616) 285-6080

Fax(616) 285-5466

Organization SubpartNo

Authorized OfficialWilliam L ParkerOwner · (616) 285-6080

Enumeration DateMarch 11, 2013

✔ NPI 1821339250 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychologist · ClinicalBehavioral Health & Social Service Providers

Taxonomy Code103TC0700X

License✔ Licensed in MI · 6301007243

Definition

A psychologist who provides continuing and comprehensive mental and behavioral health care for individuals and families; consultation to agencies and communities; training, education and supervision; and research-based practice. It is a specialty in breadth -- one that is broadly inclusive of severe psychopathology -- and marked by comprehensiveness and integration of knowledge and skill from a broad array of disciplines within and outside of psychology proper. The scope of clinical psychology encompasses all ages, multiple diversities and varied systems.

2894 THORNAPPLE RIVER DR SE, Grand Rapids, MI 49546

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Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Care Network of Michigan, Blue Cross Blue Shield of Michigan Mutual Insurance Company.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

William Parker Phd Pc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to William Parker Phd PC, which bills Medicare for the services this clinician delivers.

Clinician (1)

William Parker, PHD

Clinical Psychologist

NPI 1093926198

2894 THORNAPPLE RIVER DR SE
Grand Rapids, MI 49546

(616) 285-6080

✔ PECOS✔ Accepts MedicareSame address

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 William Parker Phd PC's NPI number?

The NPI number for William Parker Phd PC is 1821339250. It was assigned to this organization in the NPPES registry on March 11, 2013.

Where is William Parker Phd PC located?

William Parker Phd PC is located at 2894 Thornapple River Dr SE, Grand Rapids, MI 49546. The listed phone number is (616) 285-6080.

What is William Parker Phd PC's specialty?

The primary specialty registered for this NPI is Psychologist, specializing in Clinical, with taxonomy code 103TC0700X.

Is William Parker Phd PC enrolled in Medicare?

Yes. William Parker Phd PC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through William Parker Phd PC?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Clinical Psychologist) reassigns their Medicare billing to William Parker Phd PC. A 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 the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

What insurance does William Parker Phd PC accept?

Health plans from Blue Care Network of Michigan and Blue Cross Blue Shield of Michigan Mutual Insurance Company list William Parker Phd PC 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 Phd PC was last updated on March 11, 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.