Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Colorado Allergy and Asthma Centers, PC

Specialist in Greeley, 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

1568034155

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Registry record

Entity type Organization (Type 2)

Legal business name Colorado Allergy and Asthma Centers, PC

Practice address 3400 W 16th St Bldg 5, Unit Y, Greeley, CO, 80634

Phone (970) 356-3907

Fax (970) 356-3825

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

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2021-07-13. Verify at npiregistry.cms.hhs.gov.

Where is Colorado Allergy and Asthma Centers, PC located?

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

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