Quick answers
- Does Masaharu M. Osato accept Medicare assignment?
- Yes. Medicare's clinician data says Masaharu M. Osato 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 Masaharu M. Osato see?
- In 2024, CMS data shows 302 Original Medicare patients and 9,351 services for Masaharu M. Osato. This counts Original Medicare only and measures volume, not quality.
- What is Masaharu M. Osato's NPI number?
- 1265470280. 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 Masaharu M. Osato, 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 | 302 |
|---|---|
| Services billed to Medicare | 9,351 |
| Different services or procedures | 72 |
| Participating Medicare provider | Yes |
| Average age of these patients | 78 |
Most frequent services
- Injection, denosumab, 1 mg (J0897)4,920 services
- Insertion of needle into vein for collection of blood sample (36415)559 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)477 services
- Blood test, comprehensive group of blood chemicals (80053)434 services
- Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional (99211)434 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 pressure72%
- Diabetes25%
- Osteoporosis25%
- Arthritis22%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)15%
Practice locations
Addresses where Masaharu M. Osato is enrolled with Medicare (CMS data updated October 2, 2026).
- 2860 Sepulveda BlvdTorrance, CA 90505 (310) 534‑8200
Group practices
Medicare enrollment lists Masaharu M. Osato as a member of this group (CMS data updated October 2, 2026).
- Osato Medical Clinic Inc4 clinicians in the group
Specialties
- Gastroenterologyprimary
- Internal Medicinealso
Other gastroenterologists in Torrance
Clinicians with the same Medicare primary specialty in Torrance, CA — not a recommendation.
Other clinicians in Osato Medical Clinic Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Loma Linda University School Of Medicine |
| Graduation year | 1983 (43 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1265470280 |
| 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
- 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