Quick answers
- Does Yuichiro D. Nakai accept Medicare assignment?
- Yes. Medicare's clinician data says Yuichiro D. Nakai 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 Yuichiro D. Nakai see?
- In 2024, CMS data shows 598 Original Medicare patients and 18,966 services for Yuichiro D. Nakai. This counts Original Medicare only and measures volume, not quality.
- What is Yuichiro D. Nakai's NPI number?
- 1497739114. 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 Yuichiro D. Nakai, 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 | 598 |
|---|---|
| Services billed to Medicare | 18,966 |
| Different services or procedures | 22 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Injection, romosozumab-aqqg, 1 mg (J3111)11,130 services
- Injection, denosumab, 1 mg (J0897)5,460 services
- Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)855 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)638 services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)235 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 pressure67%
- Arthritis44%
- Osteoporosis40%
- Diabetes38%
- Chronic kidney disease27%
Hospitals where Yuichiro D. Nakai works
Medicare's Facility Affiliation Data lists Yuichiro D. Nakai 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.
- Adventist Health Mendocino CoastFort Bragg, CA · Critical Access Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 051325
- Adventist Health Ukiah ValleyUkiah, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050301
- Healdsburg HospitalHealdsburg, CA · Critical Access Hospital · Emergency services: listed by Medicare · CCN 051321
- Providence Santa Rosa Memorial HospitalSanta Rosa, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050174
- Sonoma Valley HospitalSonoma, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 050090
Practice locations
Addresses where Yuichiro D. Nakai is enrolled with Medicare (CMS data updated October 2, 2026).
- 1162 Montgomery Dr, Suite 200Santa Rosa, CA 95405 (707) 890‑4100
Group practices
Medicare enrollment lists Yuichiro D. Nakai as a member of this group (CMS data updated October 2, 2026).
- Providence Medical Foundation1,466 clinicians in the group
Specialties
- Endocrinologyprimary
Other endocrinologists in Santa Rosa
Clinicians with the same Medicare primary specialty in Santa Rosa, CA — not a recommendation.
Other clinicians in Providence Medical Foundation
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Saint Louis University School Of Medicine |
| Graduation year | 2000 (26 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1497739114 |
| 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