NPI Portal NPI Lookup & Verification

Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Gary Hollander Do Plc

Physician Assistant in Walled Lake, MI · enumerated 2007 · authorized official Debbie Witt-Haggerty, Office Manager.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1790901072

Verified

See something wrong? Report a correction

Registry record

Entity type Organization (Type 2)
Legal business name Gary Hollander Do Plc
Other name <Unavail>
Practice address 620 N Pontiac Trl, Walled Lake, MI, 48390
Phone (248) 624-4511
Fax (248) 624-4408
Enumeration date Apr 17, 2007
Last updated in NPPES Sep 11, 2025

Taxonomy & classification

207QH0002X Hospice and Palliative Medicine (Family Medicine) Physician Allopathic & Osteopathic Physicians · License 5101013058 (MI) Secondary
207RH0002X Hospice and Palliative Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License 5101012793 (MI) Secondary
363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 5601002389 (MI) Primary

Authorized official

Name Debbie Witt-Haggerty
Title Office Manager
Phone (248) 624-4511

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Gary Hollander Do Plc?
The NPI for Gary Hollander Do Plc is 1790901072, a Type 2 (organization) record in the CMS NPPES registry.
Who is the authorized official for Gary Hollander Do Plc?
NPPES lists Debbie Witt-Haggerty (Office Manager) as the authorized official for this organization.

Providers at this address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-11.