Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Heidi Weiss Tessler, MD

Internal Medicine Physician in Golden, CO · enumerated 2005 · practices at Optumcare Colorado Medical Group LLC.

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

National Provider Identifier

1306822291

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Registry record

Entity type Individual (Type 1)

Name Dr. Heidi Weiss Tessler

Credential MD

Sex Female

Practice address 1707 Cole Blvd Ste 100, Golden, CO, 80401

Phone (303) 763-4900

Enumeration date Dec 21, 2005

Last updated in NPPES Nov 18, 2024

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 28983 (CO) 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
01289834	Medicaid	CO	-

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 Heidi Tessler practice?

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

What is the NPI number for Heidi Tessler?

The National Provider Identifier (NPI) for Heidi Tessler is 1306822291, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Mike Mcmillan Family Medicine Physician · Golden, CO NPI 1801868401 Tisha Fujii Critical Care Medicine (Internal Medicine) Physician · Golden, CO NPI 1720092596 Nader Omar Hospitalist Physician · Golden, CO NPI 1437457801 Andrew Koch Hospitalist Physician · Golden, CO NPI 1104125954 Rafid Al Daly Internal Medicine Physician · Golden, CO NPI 1215370101 Tuongvy Zamurs Internal Medicine Physician · Golden, CO NPI 1124467808 Tamara Reeves-Sandoval Nurse Practitioner · Golden, CO NPI 1497188569 Lauren Boyle Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist · Golden, CO NPI 1508280561

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-11-18.