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TERESA MAY SIEG RD, CDE
NPI 1962653477
Dietitian, Registered in Greeley, CO

Active since October 02, 2008
1600 23RD AVE, GREELEY, CO 80634(970) 810-2424(970) 810-2774 Get Directions Write a Review

NPPES record last updated: September 28, 2016. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Teresa May Sieg Rd, Cde NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

TERESA MAY SIEG RD, CDE (NPI 1962653477) is an individual dietitian, registered in Greeley, Colorado, licensed in (716166) and active in the NPI registry since October 2008.

NPPES Registry Identity

NPI1962653477
Entity TypeIndividualFemale
Primary Taxonomy133V00000X
Provider Legal NameTERESA MAY SIEGCredential: RD, CDE
Location Address1600 23RD AVEGreeley, CO 80634-6070
Mailing Address1600 23rd AveGreeley, CO 80634-6070 · (970) 810-2424 · Fax (970) 810-2774
Phone(970) 810-2424
Fax(970) 810-2774
Sole ProprietorNo
Enumeration DateOctober 2, 2008
Last NPPES UpdateSeptember 28, 2016
✔ NPI 1962653477 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDietitian, RegisteredDietary & Nutritional Service Providers
Taxonomy Code133V00000X
License✔ Licensed · 716166
Definition
A Registered Dietitian (RD)/Registered Dietitian Nutritionist (RDN) is an individual uniquely trained in the science of nutrition and practice of dietetics to design and provide medical nutrition therapy (MNT) and other evidence-based applications of the Nutrition Care Process (NCP) that exemplify the profession's systematic approach to providing high quality nutrition care. Registered dietitians provide MNT for the purpose of disease prevention or management, or to treat or rehabilitate an illness, injury, or condition, with the use of specific, indicated physical and cognitive nutrition care services comprised of one or more of the following aspects of the NCP: nutrition assessment/reassessment, nutrition diagnosis, nutrition intervention (e.g., nutrition counseling, therapeutic diet ordering, and nutrition education) and nutrition monitoring and evaluation.
1600 23RD AVE, Greeley, CO 80634
Open in Google Maps ↗

Other Identifiers 3

Medicare PINCO303135CO
Medicare PINC493698CO
Medicare PINCO306254CO

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Teresa May Sieg Rd, Cde is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Medicare Billing Reassignments

2

Medicare enrollment records show Teresa Sieg reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

North Colorado Family Medicine
Same address
Primary Care
1600 23RD AVE
Greeley, CO 80634
  • Reassigned Medicare billing, Colorado enrollment
  • 45 clinicians in this Medicare group
NPI 1083642680 (602) 747-4000
Banner Health Physicians Colorado LLC
0.2 mi
Multi-Specialty
2410 W 16TH ST
Greeley, CO 80634
  • Reassigned Medicare billing, Colorado enrollment
  • 324 clinicians in this Medicare group
NPI 1144702234 (970) 810-5612

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DOROTHY MARIE SCHULTE FNP
Nurse Practitioner
1600 23RD AVE
GREELEY, CO 80634
Weld County (970) 356-2424
ELIZABETH ANNE MARIE POSKIE MD
Student in an Organized Health Care Education/Training Program
1600 23RD AVE
GREELEY, CO 80634
Weld County (970) 810-2424
JENNA MARIE HESSLER MD
Family Medicine
1600 23RD AVE
GREELEY, CO 80634
Weld County (406) 437-3002
DR. AYNSLEY QI-WEN HARTNEY MD
Student in an Organized Health Care Education/Training Program
1600 23RD AVE
GREELEY, CO 80634
Weld County (970) 810-2424
BETHANY PAJ TSIS THAWJ XIONG-KOON
Student in an Organized Health Care Education/Training Program
1600 23RD AVE
GREELEY, CO 80634
Weld County (303) 929-3768
STEPHEN ZERLANG
Family Medicine
1600 23RD AVE
GREELEY, CO 80634
Weld County (970) 346-2800
HEALTHONE CLINIC SERVICES - PEDIATRIC SPECIALTIES LLC
Pediatrics (Pediatric Cardiology)
1600 23RD AVE
GREELEY, CO 80634
Weld County (303) 860-9933
KACEY JANE KEMPER
Student in an Organized Health Care Education/Training Program
1600 23RD AVE
GREELEY, CO 80634
Weld County (970) 810-2424

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Teresa Sieg's NPI number?

The NPI number for Teresa Sieg is 1962653477. It was assigned to this individual provider in the NPPES registry on October 2, 2008.

Where is Teresa Sieg located?

Teresa Sieg practices at 1600 23rd Ave, Greeley, CO 80634. The listed phone number is (970) 810-2424.

What is Teresa Sieg's specialty?

The primary specialty registered for this NPI is Dietitian, Registered with taxonomy code 133V00000X.

Is Teresa Sieg enrolled in Medicare?

Yes. Teresa Sieg is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Teresa Sieg's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Teresa Sieg reassigns Medicare benefits to 2 organizations: North Colorado Family Medicine (Greeley, CO) and Banner Health Physicians Colorado LLC (Greeley, CO). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Teresa Sieg's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Teresa Sieg was last updated on September 28, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.