Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mary B Flannery, M.D.

Child & Adolescent Psychiatry Physician in Katonah, NY · enumerated 2007.

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

National Provider Identifier

1598989055

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Registry record

Entity type Individual (Type 1)

Name Mary B Flannery

Credential M.D.

Sex Female

Practice address 800 Cross River Road, Katonah, NY, 19536

Phone (914) 763-8151

Fax (877) 810-1152

Enumeration date Apr 13, 2007

Last updated in NPPES Apr 13, 2015

Taxonomy & licenses

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License 198939 (NY) Secondary

2084P0804X Child & Adolescent Psychiatry Physician Allopathic & Osteopathic Physicians · License 198939 (NY) 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

Is NPI 1598989055 active?

Yes, as of the latest NPPES snapshot, NPI 1598989055 is active (record last updated 2015-04-13).

How do I verify Mary Flannery's NPI record?

Cross-check NPI 1598989055 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-04-13.