Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Kallgren Dermatology

Dermatology Physician in Boulder, CO · enumerated 2014 · authorized official Susan Rancis, PA-C.

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

National Provider Identifier

1275953689

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Registry record

Entity type Organization (Type 2)

Legal business name Kallgren Dermatology

Practice address 3434 47th Street, Suite 200, Boulder, CO, 80301

Phone (303) 444-8100

Fax (303) 444-8113

Enumeration date Apr 24, 2014

Last updated in NPPES Apr 24, 2014

Taxonomy & classification

207N00000X Dermatology Physician Allopathic & Osteopathic Physicians · License 179 (CO) Primary

Authorized official

Name Susan Rancis

Title PA-C

Phone (303) 444-8100

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

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2014-04-24. Verify at npiregistry.cms.hhs.gov.

Where is Kallgren Dermatology located?

The practice location on file with NPPES is in Boulder, CO.

Providers at this address

Browse all →

Susan Rancis Physician Assistant · Boulder, CO NPI 1144213679 Occupational Health Centers of the Southwest P.A. Health Service Clinic/Center · Boulder, CO NPI 1558406173 American Current Care PA PC Clinic/Center · Boulder, CO NPI 1386833291

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-04-24.