Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Hilary L Holzer, MA, LCADC

Addiction (Substance Use Disorder) Counselor in Prince Frederick, MD · enumerated 2009.

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

National Provider Identifier

1235370172

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Registry record

Entity type Individual (Type 1)

Name Ms. Hilary L Holzer

Credential MA, LCADC

Sex Female

Practice address 975 Solomons Island Rd N, Prince Frederick, MD, 20678

Phone (410) 535-5400

Fax (410) 535-0736

Enumeration date Mar 23, 2009

Last updated in NPPES Mar 23, 2009

Taxonomy & licenses

101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers · License LCA458 (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.

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Frequently asked questions

How do I verify Hilary Holzer's NPI record?

Cross-check NPI 1235370172 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1235370172 active?

Yes, as of the latest NPPES snapshot, NPI 1235370172 is active (record last updated 2009-03-23).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-03-23.