Quick answers
- Does Hilary S. Sillik accept Medicare assignment?
- Yes. Medicare's clinician data says Hilary S. Sillik 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 Hilary S. Sillik see?
- In 2024, CMS data shows 133 Original Medicare patients and 319 services for Hilary S. Sillik. This counts Original Medicare only and measures volume, not quality.
- What is Hilary S. Sillik's NPI number?
- 1487897856. 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 Hilary S. Sillik, 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 | 133 |
|---|---|
| Services billed to Medicare | 319 |
| Different services or procedures | 24 |
| Participating Medicare provider | Yes |
| Average age of these patients | 68 |
Most frequent services
- Pathology examination of tissue using a microscope, intermediate complexity (88305)100 services
- Special stained specimen slides to examine tissue, initial procedure (88342)31 services
- Pathology examination of tissue using a microscope, moderately high complexity (88307)22 services
- Protein measurement, serum (84165)21 services
- Immunologic analysis technique on serum (immunofixation) (86334)21 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 pressure59%
- High cholesterol50%
- Diabetes37%
- Arthritis36%
- Chronic kidney disease29%
- Depression28%
Practice locations
Addresses where Hilary S. Sillik is enrolled with Medicare (CMS data updated October 2, 2026).
- 206 W County Line Rd, Suite 340Littleton, CO 80129 (303) 888‑6426
Group practices
Medicare enrollment lists Hilary S. Sillik as a member of this group (CMS data updated October 2, 2026).
- Alta Vista Dermatology, LLC7 clinicians in the group
Specialties
- Pathologyprimary
Other pathologists in Colorado
Clinicians with the same Medicare primary specialty in Colorado — not a recommendation.
Other clinicians in Alta Vista Dermatology, LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Colorado School Of Medicine, Denver |
| Graduation year | 2009 (17 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1487897856 |
| 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