Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Allen J Gilson M.D. LLC

Q: What type of organization is Allen J Gilson M.D. LLC?

Allen J Gilson M.D. LLC is registered in NPPES as a Geriatric Medicine (Internal Medicine) Physician (its primary provider taxonomy).

Geriatric Medicine (Internal Medicine) Physician in Frederick, MD · enumerated 2011 · authorized official Allen Gilson, Physician.

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

National Provider Identifier

1093011298

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Registry record

Entity type Organization (Type 2)

Legal business name Allen J Gilson M.D. LLC

Practice address 6695 Stone Ridge Ct, Frederick, MD, 21702

Phone (301) 662-5836

Fax (301) 620-9596

Enumeration date Feb 4, 2011

Last updated in NPPES Feb 4, 2011

Taxonomy & classification

207RG0300X Geriatric Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License D0026516 (MD) Primary

Authorized official

Name Allen Gilson

Title Physician

Phone (301) 662-5836

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 a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

What type of organization is Allen J Gilson M.D. LLC?

Allen J Gilson M.D. LLC is registered in NPPES as a Geriatric Medicine (Internal Medicine) Physician (its primary provider taxonomy).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-02-04.