BRIAN AHN
NPI 1144682253
Internal Medicine - Critical Care Medicine in Aurora, CO
About Brian Ahn NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
BRIAN AHN (NPI 1144682253) is an individual critical care medicine provider in Aurora, Colorado, licensed in Colorado (DR.0062593) and active in the NPI registry since March 2016. He is enrolled in Medicare PECOS, maintains a secondary practice location in Pittsburgh, and is a graduate of University Of Pittsburgh School Of Medicine (2016).
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Brian Ahn is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
2Medicare enrollment records show Brian Ahn reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Denver, CO 80204
- Reassigned Medicare billing, Colorado enrollment
- 2,259 clinicians in this Medicare group
Lakewood, CO 80228
- Reassigned Medicare billing, Colorado enrollment
- 67 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 11
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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 80045 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Referred Medical Equipment & Supplies CMS DME claims
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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.
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 Brian Ahn's NPI number?
The NPI number for Brian Ahn is 1144682253. It was assigned to this individual provider in the NPPES registry on March 28, 2016.
Where is Brian Ahn located?
Brian Ahn practices at 12605 E 16th Ave, Aurora, CO 80045. The listed phone number is (720) 848-0000.
What is Brian Ahn's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Critical Care Medicine, with taxonomy code 207RC0200X.
Is Brian Ahn enrolled in Medicare?
Yes. Brian Ahn is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Brian Ahn's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Brian Ahn reassigns Medicare benefits to 2 organizations: Denver Health And Hospital Authority (Denver, CO) and Critical Care Pulmonary And Sleep Associates Professional LLP (Lakewood, CO). Each 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 Brian Ahn'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 Brian Ahn was last updated on March 24, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years 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.
# Brian Ahn · NPI 1144682253
Critical Care Medicine physician in Aurora, Colorado. Individual provider, active in the CMS NPPES registry since March 28, 2016.
## Identity
- **NPI:** 1144682253 (Entity type: Individual)
- **Enumerated:** March 28, 2016
- **Primary specialty:** Internal Medicine - Critical Care Medicine · taxonomy 207RC0200X
- **State license:** DR.0062593 (Colorado)
- **Sole proprietor:** No
## Practice location
- **Address:** 12605 E 16TH AVE, Aurora, CO 80045-2545
- **Phone:** (720) 848-0000
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Denver Health And Hospital Authority (NPI 1477569838, Denver, CO); Critical Care Pulmonary And Sleep Associates Professional LLP (NPI 1437100039, Lakewood, CO) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Pittsburgh School Of Medicine, class of 2016
## Record status
- **NPPES last updated:** March 24, 2022
---
Source: [NPI Profile](https://npiprofile.com/npi/1144682253) · Data from the CMS NPPES public registry.