Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Denise I. Fitzsimon, MD

Pediatrics Physician in Round Rock, TX · enumerated 2007.

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

National Provider Identifier

1861525636

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Denise I. Fitzsimon

Credential MD

Sex Female

Practice address 300 University Blvd, Round Rock, TX, 78665

Phone (512) 509-0200

Enumeration date Mar 13, 2007

Last updated in NPPES Nov 9, 2022

Taxonomy & licenses

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License 3954 (AK) Secondary

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License MD26536 (OR) Secondary

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License MD00046928 (WA) Secondary

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License H1960 (TX) Primary

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

Other identifiers

Identifier	Type	State	Issuer
278407	Medicaid	OR	-
218112	Medicaid	OR	-

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

What is the NPI number for Denise Fitzsimon?

The National Provider Identifier (NPI) for Denise Fitzsimon is 1861525636, a Type 1 (individual) record in the CMS NPPES registry.

Where does Denise Fitzsimon practice?

The practice location on file with NPPES is in Round Rock, TX. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-11-09.