Quick answers
- Does Nicholas L. Castagna accept Medicare assignment?
- Medicare's clinician data says Nicholas L. Castagna may accept Medicare assignment (as of October 2, 2026). Ask the office whether they accept it for your visit.
- What is Nicholas L. Castagna's NPI number?
- 1841910270. 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 Nicholas L. Castagna is enrolled with Medicare (CMS data updated October 2, 2026).
- 26615 Maple Valley Black Diamond RdMaple Valley, WA 98038 (425) 413‑8787
- 2823 Griffin AveEnumclaw, WA 98022 (360) 825‑1614
Group practices
Medicare enrollment lists Nicholas L. Castagna as a member of these groups (CMS data updated October 2, 2026).
- Aeg Washington Professional PC62 clinicians in the group
- Maple Valley Eye Care Center PS5 clinicians in the group
Specialties
- Optometryprimary
Other optometrists in Maple Valley
Clinicians with the same Medicare primary specialty in Maple Valley, WA — not a recommendation.
Other clinicians in Aeg Washington Professional PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | OD |
|---|---|
| Graduation year | 2022 (4 years since optometry school) |
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1841910270 |
| 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