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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Grant C Olson, MD

Specialist in Denver, CO · enumerated 2006 · practices at Colorado Allergy and Asthma Centers, PC.

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

National Provider Identifier

1467423087

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Registry record

Entity type Individual (Type 1)
Name Dr. Grant C Olson
Credential MD
Sex Male
Practice address 125 Rampart Way, Suite 200, Denver, CO, 80230
Phone (720) 858-7600
Fax (720) 858-7605
Enumeration date Jan 31, 2006
Last updated in NPPES Dec 19, 2007

Taxonomy & licenses

174400000X Specialist Other Service Providers · License 27491 (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
01274919 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.

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Frequently asked questions

Where does Grant Olson practice?
The practice location on file with NPPES is in Denver, CO. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Grant Olson?
The National Provider Identifier (NPI) for Grant Olson is 1467423087, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-12-19.