NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Gregg A. Koldenhoven, MD

Orthopaedic Foot and Ankle Surgery Physician in Longmont, CO · enumerated 2005.

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

National Provider Identifier

1396740411

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Dr. Gregg A. Koldenhoven
Credential MD
Sex Male
Practice address 1610 Dry Creek Dr, Longmont, CO, 80503
Phone (303) 772-1600
Fax (970) 493-0521
Enumeration date Jun 15, 2005
Last updated in NPPES Feb 5, 2026

Taxonomy & licenses

207XS0114X Adult Reconstructive Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License DR.0039636 (CO) Secondary
207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License DR0039636 (CO) Secondary
207XX0004X Orthopaedic Foot and Ankle Surgery Physician Allopathic & Osteopathic Physicians · License DR.0039636 (CO) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD 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 Gregg Koldenhoven practice?
The practice location on file with NPPES is in Longmont, CO. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Gregg Koldenhoven?
The National Provider Identifier (NPI) for Gregg Koldenhoven is 1396740411, 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 2026-02-05.