Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Christine Nicole Grassi

Counselor in Sheridan, CO · enumerated 2020.

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

National Provider Identifier

1659904589

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Registry record

Entity type Individual (Type 1)

Name Christine Nicole Grassi

Sex Female

Practice address 3460 S Federal Blvd, Sheridan, CO, 80110

Phone (303) 761-0200

Enumeration date Feb 19, 2020

Last updated in NPPES Feb 19, 2020

Taxonomy & licenses

101Y00000X Counselor Behavioral Health & Social Service Providers Primary

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

Is NPI 1659904589 active?

Yes, as of the latest NPPES snapshot, NPI 1659904589 is active (record last updated 2020-02-19).

How do I verify Christine Grassi's NPI record?

Cross-check NPI 1659904589 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

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Erin Hameroff Adult Medicine Physician · Englewood, CO NPI 1881173953 Mile High Council on Alcoholism and Drug Abuse Substance Use Disorder Rehabilitation Clinic/Center · Sheridan, CO NPI 1255980959 Elizabeth Riggs Mental Health Counselor · Sheridan, CO NPI 1831740638 Donald Davis Professional Counselor · Sheridan, CO NPI 1780217000 Emily Thompson Professional Counselor · Sheridan, CO NPI 1194350603 Daniel Aguilar Peer Specialist · Sheridan, CO NPI 1346850781 Front Range Clinic Inc. Addiction Medicine (Family Medicine) Physician · Englewood, CO NPI 1962098426 Tyler Alvarez Case Manager/Care Coordinator · Sheridan, CO NPI 1194487199

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-02-19.