Quick answers
- Does Masato Nagao accept Medicare assignment?
- Yes. Medicare's clinician data says Masato Nagao 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 Masato Nagao see?
- In 2024, CMS data shows 167 Original Medicare patients and 313 services for Masato Nagao. This counts Original Medicare only and measures volume, not quality.
- What is Masato Nagao's NPI number?
- 1588619159. 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 Masato Nagao, 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 | 167 |
|---|---|
| Services billed to Medicare | 313 |
| Different services or procedures | 23 |
| Participating Medicare provider | Yes |
| Average age of these patients | 70 |
Most frequent services
- Needle measurement of electrical activity in arm or leg muscles, complete study (95886)82 services
- Injection of substance into lower spine canal using imaging guidance (62323)44 services
- Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, single level (64483)36 services
- Nerve conduction, 3-4 studies (95908)34 services
- Nerve conduction, 7-8 studies (95910)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 pressure71%
- High cholesterol69%
- Arthritis63%
- Depression26%
- Anxiety25%
- Diabetes24%
Hospitals where Masato Nagao works
Medicare's Facility Affiliation Data lists Masato Nagao 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.
- UCSF Medical CenterSan Francisco, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050454
- Zuckerberg San Francisco General Hospital & Trauma CenterSan Francisco, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 050228
Practice locations
Addresses where Masato Nagao is enrolled with Medicare (CMS data updated October 2, 2026).
- 1001 Potrero AveSan Francisco, CA 94110 (628) 206‑8265
- 2330 Post StSan Francisco, CA 94115 (415) 476‑4029
- 38690 Stivers St AFremont, CA 94536 (510) 248‑1040
- 400 Parnassus AveSan Francisco, CA 94143
Group practices
Medicare enrollment lists Masato Nagao as a member of these groups (CMS data updated October 2, 2026).
- University of California San Francisco1,839 clinicians in the group
- UCSF Medical Group Business Services1,598 clinicians in the group
- University of California SFGH Medical Group587 clinicians in the group
- Washington Township Medical Foundation117 clinicians in the group
Specialties
Find other Physical Medicine and Rehabilitation doctors in California →
Other rehabilitation doctors in San Francisco
Clinicians with the same Medicare primary specialty in San Francisco, CA — not a recommendation.
Other clinicians in University of California San Francisco
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1982 (44 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1588619159 |
| 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