AARON MASAYUKI TSUMURA MD
NPI 1982165213
Internal Medicine - Hematology & Oncology in Sacramento, CA
About Aaron Masayuki Tsumura Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
AARON MASAYUKI TSUMURA MD (NPI 1982165213) is an individual hematology & oncology provider in Sacramento, California, licensed in California (A180084) and active in the NPI registry since March 2019. He is enrolled in Medicare PECOS and is a graduate of Other (2019).
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Aaron Masayuki Tsumura Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show Aaron Tsumura reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Lancaster, CA 93534
- Reassigned Medicare billing, California enrollment
- 13,921 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 95817 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SACRAMENTO, CA 95817
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Aaron Tsumura's NPI number?
The NPI number for Aaron Tsumura is 1982165213. It was assigned to this individual provider in the NPPES registry on March 28, 2019.
Where is Aaron Tsumura located?
Aaron Tsumura practices at 2279 45th St, Sacramento, CA 95817. The listed phone number is (167) 345-9599.
What is Aaron Tsumura's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.
Is Aaron Tsumura enrolled in Medicare?
Yes. Aaron Tsumura is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for Aaron Tsumura's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Aaron Tsumura reassigns Medicare benefits to Southern California Permanente Medical Group (Lancaster, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Aaron Tsumura's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Aaron Tsumura was last updated on June 21, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Aaron Masayuki Tsumura, MD · NPI 1982165213
Hematology & Oncology physician in Sacramento, California. Individual provider, active in the CMS NPPES registry since March 28, 2019.
## Identity
- **NPI:** 1982165213 (Entity type: Individual)
- **Enumerated:** March 28, 2019
- **Primary specialty:** Internal Medicine - Hematology & Oncology · taxonomy 207RH0003X
- **State license:** A180084 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 2279 45TH ST, Sacramento, CA 95817-1514
- **Phone:** (167) 345-9599
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Southern California Permanente Medical Group (NPI 1982863783, Lancaster, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2019
## Record status
- **NPPES last updated:** June 21, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1982165213) · Data from the CMS NPPES public registry.