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Dr. Brian Ahn

Critical Care Medicine (Critical Care Medicine (Internal Medicine) Physician)

12605 E 16th Ave
Aurora, CO 80045

Who else practices at this address →

Adams County includes primary care (2% of residents) shortage areas. About shortage areas

Call (720) 848-0000

  • Medicare participating

At a glance

Years since graduation
10
In the NPI registry since
2016
Medicare patients seen, 2024
292

Licensed in Colorado since 2019, according to the Colorado Department of Regulatory Agencies. We show license dates only for the states that publish them in bulk; see which states do. For other states, check the state medical board.

The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. What an NPI is

Education and training

  • 2016Medical school: University of Pittsburgh School of Medicine
  • 2016Registered with an NPI (national billing number; not a license date)

Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).

Specialties and state licenses

  • Critical Care Medicine (Internal Medicine) Physician primary
    CO license DR.0062593 (first issued 2019; active)
  • Student in an Organized Health Care Education/Training Program

As reported to the NPI registry. To confirm a license is current, check the state medical board.

Map: Critical Care Medicine per capita by county →

Where they work

Hospitals

Medical groups

Hospitals this clinician lists with Medicare, and groups they bill Medicare through (Care Compare). Affiliation doesn’t mean they see patients at every location.

Medicare patients and services

Medicare patients, 2024
292
Services billed
678
Patients’ average age
74
Most frequent Medicare services, 2023
ServiceTimesPatients
Critical care, first 30-74 minutes190127
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes10872
Established patient office or other outpatient visit, 30-39 minutes5746
Test to examine how well the lungs exchange gases3735
Test to measure expiratory airflow and volume changes before and after medication administration3735
Test to determine lung volumes using gas dilution or washout3735
New patient office or other outpatient visit, 45-59 minutes3030
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes2726
Insertion of non-tunneled central venous tube for infusion (5 years or older)1212
Ultrasonic guidance for blood vessel access1212

Medicare fee-for-service only. CMS leaves out services billed for fewer than 11 patients. These figures describe a practice’s Medicare work; they aren’t a measure of quality.

Medicare prescriptions

Prescriptions filled under Medicare Part D, including refills. CMS leaves out drugs prescribed fewer than 11 times.

Payments from drug and device companies

In 2025, 3 companies reported 3 payments worth $60.30 in total to this clinician.

By type
Food and Beverage$60.30

From CMS Open Payments. A payment is not evidence of wrongdoing; many are for consulting, teaching or meals. Clinicians can review and dispute their records with CMS.

Who received the most in Colorado →

Other Critical Care Medicine clinicians in Aurora

Sources

NPI registry (CMS NPPES, November 2026; record last updated March 24, 2022), Medicare Care Compare, Medicare Physician & Other Practitioners (2024), Medicare Part D Prescribers (2024) and Open Payments (2025). Information is self-reported or billed data and may be out of date; call before visiting.

NPI 1144682253. Official NPI registry record (opens in a new tab). Clinicians can correct their information in NPPES; changes appear here after our next monthly update.