Quick answers
- Does Masaru Nishiaoki accept Medicare assignment?
- Yes. Medicare's clinician data says Masaru Nishiaoki 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 Masaru Nishiaoki see?
- In 2024, CMS data shows 43 Original Medicare patients and 469 services for Masaru Nishiaoki. This counts Original Medicare only and measures volume, not quality.
- What is Masaru Nishiaoki's NPI number?
- 1871026831. 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 Masaru Nishiaoki, 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 | 43 |
|---|---|
| Services billed to Medicare | 469 |
| Different services or procedures | 9 |
| Participating Medicare provider | Yes |
| Average age of these patients | 59 |
Most frequent services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)236 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)128 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)42 services
- Psychiatric diagnostic evaluation with medical services (90792)26 services
- Hospital discharge day management, 30 minutes or less (99238)17 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).
- Anxiety75%
- High blood pressure72%
- Depression67%
- High cholesterol60%
- Arthritis33%
Practice locations
Addresses where Masaru Nishiaoki is enrolled with Medicare (CMS data updated October 2, 2026).
- 260 Grayson Rd, Suite 100Virginia Beach, VA 23462
Group practices
Medicare enrollment lists Masaru Nishiaoki as a member of this group (CMS data updated October 2, 2026).
- Tidewater Psychotherapy Services10 clinicians in the group
Specialties
- Addiction Medicineprimary
Other addiction medicine doctors in Virginia
Clinicians with the same Medicare primary specialty in Virginia — not a recommendation.
Other clinicians in Tidewater Psychotherapy Services
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2017 (9 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) | 1871026831 |
| 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