NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Carl A Mazzola, MD

Diagnostic Radiology Physician in St Charles, MO · enumerated 2006.

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

National Provider Identifier

1801967138

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Carl A Mazzola
Credential MD
Sex Male
Practice address 300 First Capitol Drive, St Charles, MO, 63301
Phone (636) 947-5444
Fax (636) 947-5259
Enumeration date Nov 10, 2006
Last updated in NPPES Mar 18, 2024

Taxonomy & licenses

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License 2004001466 (MO) 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
209131705 Medicaid MO -

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 Carl Mazzola?
The National Provider Identifier (NPI) for Carl Mazzola is 1801967138, a Type 1 (individual) record in the CMS NPPES registry.
Where does Carl Mazzola practice?
The practice location on file with NPPES is in St Charles, MO. 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 2024-03-18.