DR. GREGORY KEITH COOK D.C.
NPI 1154470805
Chiropractor in Arvada, CO
About Dr. Gregory Keith Cook D.c. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. GREGORY KEITH COOK D.C. (NPI 1154470805) is an individual chiropractor in Arvada, Colorado, licensed in Colorado (4442) and active in the NPI registry since January 2007. He is a graduate of Western States College Of Chiropractic (1997).
NPPES Registry Identity
Specialties & Licenses
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. Gregory Keith Cook D.c. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Gregory Cook reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Arvada, CO 80004
- Reassigned Medicare billing, Colorado enrollment
- 9 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Gregory Cook's NPI number?
The NPI number for Gregory Cook is 1154470805. It was assigned to this individual provider in the NPPES registry on January 10, 2007.
Where is Gregory Cook located?
Gregory Cook practices at 9660 Ralston Rd Ste 200, Arvada, CO 80004. The listed phone number is (303) 292-9992.
What is Gregory Cook's specialty?
The primary specialty registered for this NPI is Chiropractor with taxonomy code 111N00000X.
Is Gregory Cook enrolled in Medicare?
Yes. Gregory Cook is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Gregory Cook's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Gregory Cook reassigns Medicare benefits to Downtowns Health Care LLC (Arvada, CO). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Gregory Cook's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Gregory Cook accept?
Health plans from Providence Health Plan list Gregory Cook as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Gregory Cook was last updated on October 22, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Gregory Keith Cook, D.C. · NPI 1154470805
Chiropractor provider in Arvada, Colorado. Individual provider, active in the CMS NPPES registry since January 10, 2007.
## Identity
- **NPI:** 1154470805 (Entity type: Individual)
- **Enumerated:** January 10, 2007
- **Primary specialty:** Chiropractor · taxonomy 111N00000X
- **State license:** 4442 (Colorado)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 9660 RALSTON RD STE 200, Arvada, CO 80004-4972
- **Phone:** (303) 292-9992
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Bills Medicare through:** Downtowns Health Care LLC (NPI 1265701049, Arvada, CO), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Western States College Of Chiropractic, class of 1997
## Record status
- **NPPES last updated:** October 22, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1154470805) · Data from the CMS NPPES public registry.