Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Katharine Wolcott Markell, M.D.

Colon & Rectal Surgery Physician in Ft. Sam Houston, TX · enumerated 2006.

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

National Provider Identifier

1457328361

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Registry record

Entity type Individual (Type 1)

Name Dr. Katharine Wolcott Markell

Credential M.D.

Sex Female

Practice address 3551 Roger Brooke Drive, Bldg 3600, Brooke Army Medical Center - Dept of Surgery, Ft. Sam Houston, TX, 78234

Phone (210) 916-1153

Fax (210) 916-2202

Enumeration date Mar 1, 2006

Last updated in NPPES Mar 2, 2022

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 22776 (NE) Secondary

208C00000X Colon & Rectal Surgery Physician Allopathic & Osteopathic Physicians · License 22776 (NE) 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 1457328361 active?

Yes, as of the latest NPPES snapshot, NPI 1457328361 is active (record last updated 2022-03-02).

How do I verify Katharine Markell's NPI record?

Cross-check NPI 1457328361 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 2022-03-02.