DR. RYOTARO KATO M.D., J.D.
NPI 1952506198
Internal Medicine in Honolulu, HI
About Dr. Ryotaro Kato M.d., J.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. RYOTARO KATO M.D., J.D. (NPI 1952506198) is an individual internal medicine provider in Honolulu, Hawaii, licensed in Missouri (2006039226) and active in the NPI registry since June 2007. He is enrolled in Medicare PECOS, is affiliated with Kuakini Medical Center, and is a graduate of Other (1999).
NPPES Registry Identity
Specialties & Licenses 2
Accepted Insurance
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
Dr. Ryotaro Kato M.d., J.d. 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 Reassignments
2Medicare enrollment records show Ryotaro Kato reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Honolulu, HI 96819
- Reassigned Medicare billing, Hawaii enrollment
- 1,187 clinicians in this Medicare group
Kailua, HI 96734
- Reassigned Medicare billing, Hawaii enrollment
- 4 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.
Areas of Expertise CMS Part B claims
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Kuakini Medical Center
Acute Care Hospitals · Honolulu, HIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 96819 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.
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 Ryotaro Kato's NPI number?
The NPI number for Ryotaro Kato is 1952506198. It was assigned to this individual provider in the NPPES registry on June 18, 2007.
Where is Ryotaro Kato located?
Ryotaro Kato practices at 3288 Moanalua Rd, Honolulu, HI 96819. The listed phone number is (808) 432-0000.
What is Ryotaro Kato's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Ryotaro Kato enrolled in Medicare?
Yes. Ryotaro Kato 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 organizations bill Medicare for Ryotaro Kato's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ryotaro Kato reassigns Medicare benefits to 2 organizations: Hawaii Permanente Medical Group Inc (Honolulu, HI) and Critical Care Hawaii LLC (Kailua, HI). Each 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 Ryotaro Kato's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Ryotaro Kato accept?
Health plans from Kaiser Permanente list Ryotaro Kato as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Ryotaro Kato affiliated with any hospitals?
According to CMS data, Ryotaro Kato is affiliated with Kuakini Medical Center.
When was this NPI record last updated?
The NPPES record for Ryotaro Kato was last updated on June 26, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 months 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.
# Dr. Ryotaro Kato, M.D., J.D. · NPI 1952506198
Internal Medicine physician in Honolulu, Hawaii. Individual provider, active in the CMS NPPES registry since June 18, 2007.
## Identity
- **NPI:** 1952506198 (Entity type: Individual)
- **Enumerated:** June 18, 2007
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 2006039226 (Missouri)
- **Sole proprietor:** No
## Practice location
- **Address:** 3288 MOANALUA RD, Honolulu, HI 96819-1469
- **Phone:** (808) 432-0000
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Hawaii Permanente Medical Group Inc (NPI 1710945969, Honolulu, HI); Critical Care Hawaii LLC (NPI 1275970915, Kailua, HI) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1999
## Record status
- **NPPES last updated:** June 26, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1952506198) · Data from the CMS NPPES public registry.