Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Teresa May Sieg, RD, CDE

Q: What is the NPI number for Teresa Sieg?

The National Provider Identifier (NPI) for Teresa Sieg is 1962653477, a Type 1 (individual) record in the CMS NPPES registry.

Registered Dietitian in Greeley, CO · enumerated 2008.

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

National Provider Identifier

1962653477

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Teresa May Sieg

Credential RD, CDE

Sex Female

Practice address 1600 23rd Ave, Greeley, CO, 80634

Phone (970) 810-2424

Fax (970) 810-2774

Enumeration date Oct 2, 2008

Last updated in NPPES Sep 28, 2016

Taxonomy & licenses

133V00000X Registered Dietitian Dietary & Nutritional Service Providers · License 716166 Primary

RD · Registered Dietitian: A nutrition professional credentialed by the Commission on Dietetic Registration. About the RD 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 Teresa Sieg practice?

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

What is the NPI number for Teresa Sieg?

The National Provider Identifier (NPI) for Teresa Sieg is 1962653477, 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 2016-09-28.