Quick answers
- Does Andrew L. Callen accept Medicare assignment?
- Yes. Medicare's clinician data says Andrew L. Callen accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Andrew L. Callen see?
- In 2024, CMS data shows 1,010 Original Medicare patients and 1,504 services for Andrew L. Callen. This counts Original Medicare only and measures volume, not quality.
- What is Andrew L. Callen's NPI number?
- 1538586912. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Andrew L. Callen, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 1,010 |
|---|---|
| Services billed to Medicare | 1,504 |
| Different services or procedures | 54 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Ct scan head or brain without contrast (70450)357 services
- Mri scan of brain before and after contrast (70553)235 services
- Mri scan of brain without contrast (70551)97 services
- Ct scan of blood vessels of head with contrast (70496)92 services
- Ct scan of blood vessels of neck with contrast (70498)90 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure73%
- High cholesterol68%
- Arthritis62%
- Depression35%
- Anxiety32%
- Ischemic heart disease30%
Hospitals where Andrew L. Callen works
Medicare's Facility Affiliation Data lists Andrew L. Callen at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- UCHealth Highlands Ranch HospitalHighlands Ranch, CO · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 060132
- University of Colorado Hospital AuthorityAurora, CO · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 060024
Practice locations
Addresses where Andrew L. Callen is enrolled with Medicare (CMS data updated October 2, 2026).
- 12605 E 16th Ave, Uchealth Anschutz Medical CampusAurora, CO 80045 (720) 848‑0000
- 175 Inverness Dr W, Suite 150Englewood, CO 80112 (720) 516‑9800
Group practices
Medicare enrollment lists Andrew L. Callen as a member of these groups (CMS data updated October 2, 2026).
- University Physicians Incorporated3,215 clinicians in the group
- UCHealth Imaging Services LLC258 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in Aurora
Clinicians with the same Medicare primary specialty in Aurora, CO — not a recommendation.
Other clinicians in University Physicians Incorporated
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of California, San Francisco School Of Medicine |
| Graduation year | 2014 (12 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1538586912 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians