Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Colorado Allergy and Asthma Centers, PC

Specialist in Greenwood Village, CO · enumerated 2021 · authorized official John Milewski, Coo/Chief Operating Officer.

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

National Provider Identifier

1164094751

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Registry record

Entity type Organization (Type 2)

Legal business name Colorado Allergy and Asthma Centers, PC

Practice address 7180 E Orchard Rd Ste 107, Greenwood Village, CO, 80111

Phone (303) 740-0998

Fax (303) 740-7250

Enumeration date Jul 13, 2021

Last updated in NPPES Jul 13, 2021

Taxonomy & classification

174400000X Specialist Other Service Providers Primary

Authorized official

Name John Milewski

Title Coo/Chief Operating Officer

Phone (720) 858-7431

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

What type of organization is Colorado Allergy and Asthma Centers, PC?

Colorado Allergy and Asthma Centers, PC is registered in NPPES as a Specialist (its primary provider taxonomy).

What is a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-07-13.