DR. PETER BRENDAN CAHILL MD
NPI 1144389123
Internal Medicine - Geriatric Medicine in Denver, CO
About Dr. Peter Brendan Cahill Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. PETER BRENDAN CAHILL MD (NPI 1144389123) is an individual geriatric medicine provider in Denver, Colorado, licensed in Colorado (32931) and active in the NPI registry since December 2006. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. Peter Brendan Cahill Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Peter Cahill reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Denver, CO 80247
- Reassigned Medicare billing, Colorado enrollment
- Medicare enrollment name: Colorado Permanente Medical Group PC
- 1,715 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 80247 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
DENVER, CO 80247
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 Peter Cahill's NPI number?
The NPI number for Peter Cahill is 1144389123. It was assigned to this individual provider in the NPPES registry on December 6, 2006.
Where is Peter Cahill located?
Peter Cahill practices at 10350 E Dakota Ave, Denver, CO 80247. The listed phone number is (303) 338-4545.
What is Peter Cahill's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Geriatric Medicine, with taxonomy code 207RG0300X.
Is Peter Cahill enrolled in Medicare?
Yes. Peter Cahill is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Peter Cahill's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Peter Cahill reassigns Medicare benefits to Colorado Permanente Medical Group, P.C. (Denver, 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 Peter Cahill's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Peter Cahill was last updated on June 4, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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. Peter Brendan Cahill, MD · NPI 1144389123
Geriatric Medicine physician in Denver, Colorado. Individual provider, active in the CMS NPPES registry since December 6, 2006.
## Identity
- **NPI:** 1144389123 (Entity type: Individual)
- **Enumerated:** December 6, 2006
- **Primary specialty:** Internal Medicine - Geriatric Medicine · taxonomy 207RG0300X
- **State license:** 32931 (Colorado)
- **Sole proprietor:** No
## Practice location
- **Address:** 10350 E DAKOTA AVE, Denver, CO 80247-1314
- **Phone:** (303) 338-4545
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Colorado Permanente Medical Group, P.C. (NPI 1760599724, Denver, CO), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** June 4, 2026
- **Other identifiers:** Medicaid 01329317 (CO); Other 022453 (CO)
---
Source: [NPI Profile](https://npiprofile.com/npi/1144389123) · Data from the CMS NPPES public registry.