Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Alison Rita Brennan, M.D.

Hospitalist Physician in Exeter, NH · enumerated 2006.

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

National Provider Identifier

1538199898

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Alison Rita Brennan

Credential M.D.

Sex Female

Practice address 5 Alumni Dr Fl 2, Exeter, NH, 03833

Phone (603) 580-7525

Fax (603) 580-7542

Enumeration date Jul 3, 2006

Last updated in NPPES Dec 9, 2020

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 15609 (NH) Secondary

208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License 15609 (NH) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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

How do I verify Alison Brennan's NPI record?

Cross-check NPI 1538199898 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1538199898 active?

Yes, as of the latest NPPES snapshot, NPI 1538199898 is active (record last updated 2020-12-09).

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-12-09.