Quick answers
- Does Niles F. Utlaut accept Medicare assignment?
- Yes. Medicare's clinician data says Niles F. Utlaut 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 Niles F. Utlaut see?
- In 2024, CMS data shows 204 Original Medicare patients and 3,275 services for Niles F. Utlaut. This counts Original Medicare only and measures volume, not quality.
- What is Niles F. Utlaut's NPI number?
- 1639233919. 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 Niles F. Utlaut, 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 | 204 |
|---|---|
| Services billed to Medicare | 3,275 |
| Different services or procedures | 18 |
| Participating Medicare provider | Yes |
| Average age of these patients | 80 |
Most frequent services
- Extended exam of the back part of the eye with optic nerve drawing (92202)827 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)816 services
- Exam of retinal blood vessels using a special camera after injection of a dye (92235)738 services
- Imaging of retina (92134)630 services
- Exam of visual field with extended testing (92083)190 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 cholesterol68%
- High blood pressure58%
- Arthritis44%
- Ischemic heart disease34%
- Atrial fibrillation22%
- Osteoporosis21%
Practice locations
Addresses where Niles F. Utlaut is enrolled with Medicare (CMS data updated October 2, 2026).
- 1155 Alpine Ave, Suite 270Boulder, CO 80304
- 4430 Arapahoe Ave, Suite 120bBoulder, CO 80303 (303) 440‑5033
Specialties
- Ophthalmologyprimary
Other ophthalmologists in Boulder
Clinicians with the same Medicare primary specialty in Boulder, CO — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Johns Hopkins University School Of Medicine |
| Graduation year | 1977 (49 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1639233919 |
| 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
- 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