Quick answers
- Does Holly M. Mergist accept Medicare assignment?
- Yes. Medicare's clinician data says Holly M. Mergist 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 Holly M. Mergist see?
- In 2024, CMS data shows 178 Original Medicare patients and 369 services for Holly M. Mergist. This counts Original Medicare only and measures volume, not quality.
- What is Holly M. Mergist's NPI number?
- 1407588585. 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 Holly M. Mergist, 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 | 178 |
|---|---|
| Services billed to Medicare | 369 |
| Different services or procedures | 9 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Test for hearing various pitches using earphone (92552)99 services
- Test to assess middle ear function (92567)94 services
- Test for ability to detect and repeat spoken words with speech recognition (92556)81 services
- Comprehensive hearing and speech recognition test (92557)76 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 cholesterol74%
- High blood pressure62%
- Arthritis52%
- Ischemic heart disease28%
- Depression21%
- Anxiety19%
Practice locations
Addresses where Holly M. Mergist is enrolled with Medicare (CMS data updated October 2, 2026).
- 601 E Hampden Ave, Suite 430Englewood, CO 80113 (303) 783‑9220
Group practices
Medicare enrollment lists Holly M. Mergist as a member of this group (CMS data updated October 2, 2026).
- David C Kelsall MD PC4 clinicians in the group
Specialties
- Qualified Audiologistprimary
Other audiologists in Englewood
Clinicians with the same Medicare primary specialty in Englewood, CO — not a recommendation.
Other clinicians in David C Kelsall MD PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | AU |
|---|---|
| Graduation year | 2022 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1407588585 |
| 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