Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Maria Carola Zalles, MD

Q: What is the NPI number for Maria Zalles?

The National Provider Identifier (NPI) for Maria Zalles is 1134183759, a Type 1 (individual) record in the CMS NPPES registry.

Anatomic Pathology & Clinical Pathology Physician in Round Rock, TX · enumerated 2006.

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

National Provider Identifier

1134183759

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Registry record

Entity type Individual (Type 1)

Name Maria Carola Zalles

Credential MD

Sex Female

Practice address 201 Seton Pkwy, Seton Medical Center Williamson, Dept. of Pathology, Round Rock, TX, 78665

Phone (203) 676-8400

Enumeration date Apr 12, 2006

Last updated in NPPES Nov 21, 2025

Taxonomy & licenses

207ZC0500X Cytopathology Physician Allopathic & Osteopathic Physicians · License 044040 (CT) Secondary

207ZP0102X Anatomic Pathology & Clinical Pathology Physician Allopathic & Osteopathic Physicians · License 101977 (MO) Secondary

207ZP0102X Anatomic Pathology & Clinical Pathology Physician Allopathic & Osteopathic Physicians · License 044040 (CT) Primary

207ZP0102X Anatomic Pathology & Clinical Pathology Physician Allopathic & Osteopathic Physicians · License 102400 (GA) Secondary

207ZP0102X Anatomic Pathology & Clinical Pathology Physician Allopathic & Osteopathic Physicians · License 01098530A (IN) Secondary

207ZC0500X Cytopathology Physician Allopathic & Osteopathic Physicians · License 102400 (GA) Secondary

207ZP0102X Anatomic Pathology & Clinical Pathology Physician Allopathic & Osteopathic Physicians · License 04-23856 (KS) Secondary

207ZP0213X Pediatric Pathology Physician Allopathic & Osteopathic Physicians · License 102400 (GA) Secondary

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

Where does Maria Zalles practice?

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

What is the NPI number for Maria Zalles?

The National Provider Identifier (NPI) for Maria Zalles is 1134183759, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-11-21.