Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mary Hall, PRS

Peer Specialist in Chestertown, MD · enumerated 2024.

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

National Provider Identifier

1700641503

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Registry record

Entity type Individual (Type 1)

Name Mary Hall

Credential PRS

Sex Female

Practice address 126 Philosophers Ter, Chestertown, MD, 21620

Phone (443) 215-5353

Fax (833) 615-2165

Enumeration date Feb 20, 2024

Last updated in NPPES Feb 20, 2024

Taxonomy & licenses

175T00000X Peer Specialist Other Service Providers · License PR0868 (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

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.

What specialty is Mary Hall?

Mary Hall is registered in NPPES with the primary taxonomy of Peer Specialist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-02-20.