Quick answers
- Does Glen K. Nagasawa accept Medicare assignment?
- Yes. Medicare's clinician data says Glen K. Nagasawa 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 Glen K. Nagasawa see?
- In 2024, CMS data shows 272 Original Medicare patients and 3,588 services for Glen K. Nagasawa. This counts Original Medicare only and measures volume, not quality.
- What is Glen K. Nagasawa's NPI number?
- 1285618116. 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 Glen K. Nagasawa, 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 | 272 |
|---|---|
| Services billed to Medicare | 3,588 |
| Different services or procedures | 15 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)185 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)75 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)63 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)35 services
- Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)18 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 pressure75%
- High cholesterol75%
- Arthritis59%
- Anxiety41%
- Diabetes36%
- Depression36%
Hospitals where Glen K. Nagasawa works
Medicare's Facility Affiliation Data lists Glen K. Nagasawa 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.
- Atrium Medical CenterFranklin, OH · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 360076
- Kettering Health Main CampusKettering, OH · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 360079
- Miami Valley HospitalDayton, OH · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 360051
- Upper Valley Medical CenterTroy, OH · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 360174
Practice locations
Addresses where Glen K. Nagasawa is enrolled with Medicare (CMS data updated October 2, 2026).
- 30 E Apple St, Suite 5254aDayton, OH 45409 (937) 208‑4200
Group practices
Medicare enrollment lists Glen K. Nagasawa as a member of this group (CMS data updated October 2, 2026).
- Premier Health Specialists Inc580 clinicians in the group
Specialties
- Neurologyprimary
Other neurologists in Dayton
Clinicians with the same Medicare primary specialty in Dayton, OH — not a recommendation.
Other clinicians in Premier Health Specialists Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1981 (45 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) | 1285618116 |
| 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