Quick answers
- Does Ian K. Hornstra accept Medicare assignment?
- Yes. Medicare's clinician data says Ian K. Hornstra 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.
- What is Ian K. Hornstra's NPI number?
- 1124044359. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Ian K. Hornstra is enrolled with Medicare (CMS data updated October 2, 2026).
- 12200 Weber Hill Rd, Suite 200Saint Louis, MO 63127 (314) 842‑5660
Group practices
Medicare enrollment lists Ian K. Hornstra as a member of this group (CMS data updated October 2, 2026).
- Dermatological Care, Inc.11 clinicians in the group
Specialties
- Dermatologyprimary
Other dermatologists in Saint Louis
Clinicians with the same Medicare primary specialty in Saint Louis, MO — not a recommendation.
Other clinicians in Dermatological Care, Inc.
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Missouri, Kansas City, School Of Medicine |
| Graduation year | 1986 (40 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1124044359 |
| 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
- 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