NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Mr. Michael Allan Gillis, LCSW-C

Clinical Social Worker in Bel Air, MD · enumerated 2019 · practices at Harco Marriage and Family Therapy & Wellness Center.

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

National Provider Identifier

1164068110

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Mr. Michael Allan Gillis
Credential LCSW-C
Sex Male
Practice address Bel Air, MD, 21015
Phone (443) 371-3233
Enumeration date Nov 25, 2019
Last updated in NPPES Nov 25, 2019

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 20484 (MD) Primary

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 specialty is Michael Gillis?
Michael Gillis is registered in NPPES with the primary taxonomy of Clinical Social Worker. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-11-25.