Dr. Ryotaro Kato, JD, MD
- Medicare services, 2024
- 55
- Medicare patients, 2024
- 24
- Hospital affiliations
- 1
- Industry payments
- $7,341
- Medical group
- 1
- Practice address
- 347 North Kuakini Street, Honolulu, HI 96817
- Practice phone
- Call (808) 536-2236
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Kato's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Ryotaro Kato is an internist in Honolulu, Hawaii
Dr. Kato practices at Kuakini Medical Center in Honolulu, Hawaii, part of Kuakini Health System.
Dr. Kato's NPI, 1952506198, was assigned on June 18, 2007. Dr. Kato holds Missouri license 2006039226.
- NPI
- 1952506198NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2769629377
- NPI enumeration date
- June 18, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (808) 536-2236
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 53
- Medical school graduation
- 1999
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Ryotaro Kato practices at Kuakini Medical Center in Honolulu, Hawaii
Dr. Kato's primary practice is Kuakini Medical Center, at 347 North Kuakini Street, Honolulu, HI 96817 in Honolulu County. The practice phone is (808) 536-2236.
- Kuakini Medical Center347 North Kuakini Street, Honolulu, HI 96817 · Honolulu CountyPhone(808) 536-2236
Source: Dmand AI Affiliation Data
Dr. Ryotaro Kato is affiliated with 2 sites of care and 1 medical group
Dr. Kato's primary practice is Kuakini Medical Center in Honolulu, Hawaii, part of Kuakini Health System. The medical group on file is Critical Care Hawaii. Dmand AI also links Dr. Kato to 1 more skilled nursing facility, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Ryotaro Kato's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Kato practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Kuakini Medical Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Kuakini Health System and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Ryotaro Kato is one of 771 internists in Hawaii
Internal medicine is Dr. Kato's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Kato is licensed in Missouri.
Specialties and state licenses
- Internal medicine, MissouriPrimary
Internists near Dr. Kato
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Ryotaro Kato billed Medicare for 55 services in 2024
CMS data shows 55 Medicare services from Dr. Kato across 1 procedure code in 2024, for 24 Medicare patients. Medicare paid $9,061 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Kato's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 412024: 5534%
Dr. Kato compared with the Hawaii median for internists, 2024
- Dr. Kato
- Hawaii median
- Medicare services
- 55vs 34284% below
- Medicare patients
- 24vs 12881% below
Medians across 699 internists in Hawaii with Dmand AI profiles that report each measure.
Dr. Kato's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Kato?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Kato and other internists in Hawaii.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Ryotaro Kato treated 24 Medicare patients in 2024, average age 79
CMS counts 24 Medicare patients who saw Dr. Kato in 2024. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 2.87, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Kato's median patient age at 75, with 38% women.
Dr. Kato's Medicare patients by sex, 2024
- Women1250%
- Men1250%
Chronic conditions among Dr. Kato's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Chronic kidney disease67%
- Diabetes67%
- Heart failure63%
- Ischemic heart disease63%
- Atrial fibrillation54%
Share of Medicare patients with each condition. A patient can have several.
Dr. Kato's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 75
Patient panel by sex, all payers
- Women38%
- Men62%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
How Dr. Ryotaro Kato takes part in Medicare
Dr. Kato accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Ryotaro Kato received $7,341 in industry payments from 2023 to 2025
CMS Open Payments shows 7 general payments to Dr. Kato from 3 drug and device companies from 2023 to 2025. Travel and lodging make up the largest share, 98% of the total. Siemens Medical Solutions USA, Inc. paid the most, $7,200.
General payments to Dr. Kato by program year, 2023 to 2025
General payments to Dr. Kato by kind, 2023 to 2025
- Travel and lodging$7,20098%
- Food and beverage$1412%
Companies that paid Dr. Kato the most, 2023 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Ryotaro Kato's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Ryotaro Kato
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Ryotaro Kato's NPI number?
Dr. Ryotaro Kato's NPI number is 1952506198. It was assigned on June 18, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Ryotaro Kato?
Dr. Ryotaro Kato is an internist in Honolulu, Hawaii. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Ryotaro Kato practice?
Dr. Kato practices at 347 North Kuakini Street, Honolulu, HI 96817. Dr. Kato's primary practice is Kuakini Medical Center in Honolulu, Hawaii, part of Kuakini Health System. Dmand AI also links Dr. Kato to 1 skilled nursing facility.
What is Dr. Ryotaro Kato's office phone number?
The practice phone on file for Dr. Kato is (808) 536-2236.
What is Dr. Ryotaro Kato's medical license number?
Dr. Kato holds Missouri license 2006039226.
Which hospitals is Dr. Ryotaro Kato affiliated with?
Dr. Kato practices at Kuakini Medical Center in Honolulu, Hawaii.
What medical group is Dr. Ryotaro Kato part of?
Dr. Kato is linked to Critical Care Hawaii.
Does Dr. Ryotaro Kato accept Medicare?
Yes. CMS data shows Dr. Kato billed Medicare for 55 services in 2024, and Dr. Kato accepts Medicare assignment.
How many Medicare patients does Dr. Ryotaro Kato see?
CMS counts 24 Medicare patients who saw Dr. Kato in 2024, with an average age of 79.
What services does Dr. Ryotaro Kato bill to Medicare?
In 2024, Dr. Kato's most billed Medicare services were critical care (99291).
Has Dr. Ryotaro Kato received payments from drug or device companies?
CMS Open Payments shows $7,341 in general payments to Dr. Kato from 3 companies from 2023 to 2025. The largest total came from Siemens Medical Solutions USA, Inc.
How long has Dr. Ryotaro Kato been practicing?
Dr. Kato graduated from medical school in 1999, 27 years ago.
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