Quick answers
- Does Nathan R. Yamagata accept Medicare assignment?
- Medicare's clinician data says Nathan R. Yamagata may accept Medicare assignment (as of October 2, 2026). Ask the office whether they accept it for your visit.
- How many Medicare patients does Nathan R. Yamagata see?
- In 2024, CMS data shows 240 Original Medicare patients and 242 services for Nathan R. Yamagata. This counts Original Medicare only and measures volume, not quality.
- What is Nathan R. Yamagata's NPI number?
- 1407402902. 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 Nathan R. Yamagata, 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 | 240 |
|---|---|
| Services billed to Medicare | 242 |
| Different services or procedures | 54 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Anesthesia for lens surgery (00142)38 services
- Anesthesia for other procedure on large bowel using an endoscope (00811)35 services
- Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)26 services
- Anesthesia for exam of colon using an endoscope (00812)16 services
- Anesthesia for procedure on small and large bowel using an endoscope (00813)16 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 cholesterol75%
- High blood pressure70%
- Arthritis57%
- Ischemic heart disease34%
- Diabetes30%
- Anxiety30%
Hospitals where Nathan R. Yamagata works
Medicare's Facility Affiliation Data lists Nathan R. Yamagata at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Ronald Reagan UCLA Medical CenterLos Angeles, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050262
- Santa Monica - UCLA Medical Center & Orthopaedic HospitalSanta Monica, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050112
Practice locations
Addresses where Nathan R. Yamagata is enrolled with Medicare (CMS data updated October 2, 2026).
- 100 Moody Ct, Suite 200Thousand Oaks, CA 91360 (805) 418‑3500
- 1225 15th StSanta Monica, CA 90404 (310) 319‑1234
- 1245 16th StSanta Monica, CA 90404 (310) 794‑1841
- 23560 Madison StTorrance, CA 90505 (310) 325‑6331
- 757 Westwood PlzLos Angeles, CA 90095 (310) 825‑9111
Group practices
Medicare enrollment lists Nathan R. Yamagata as a member of these groups (CMS data updated October 2, 2026).
- Regents of the University of California236 clinicians in the group
- Amsurg South Bay Anesthesia LP11 clinicians in the group
Specialties
Find other clinicians: Certified Registered Nurse Anesthetist (CRNA), California →
Other nurse anesthetists in Thousand Oaks
Clinicians with the same Medicare primary specialty in Thousand Oaks, CA — not a recommendation.
Other clinicians in Regents of the University of California
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | CNA |
|---|---|
| Graduation year | 2021 |
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1407402902 |
| 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- 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