NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Anna C Freitag, M.D.

Endocrinology, Diabetes & Metabolism Physician in Waterbury, CT · enumerated 2005.

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

National Provider Identifier

1235113507

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Anna C Freitag
Credential M.D.
Sex Female
Practice address 56 Franklin St, Waterbury, CT, 06706
Enumeration date Dec 1, 2005
Last updated in NPPES Nov 9, 2021

Taxonomy & licenses

207RE0101X Endocrinology, Diabetes & Metabolism Physician Allopathic & Osteopathic Physicians · License 037590 (CT) 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
7758057 Other CT AETNA
1203490 Other - USA
037590 Other CT CONNECTICARE
956994 Other CT WELLCARE

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 Anna Freitag practice?
The practice location on file with NPPES is in Waterbury, CT. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Anna Freitag?
The National Provider Identifier (NPI) for Anna Freitag is 1235113507, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-11-09.