Dr. Michael Ishioka, MD
- Medicare services, 2024
- 770
- Medicare patients, 2024
- 285
- Part D claims, 2024
- 4,567
- Hospital affiliations
- 5
- Industry payments
- $360
- Practice address
- 640 Ulukahiki St, Kailua, HI 96734
- Practice phone
- Call (808) 263-5015
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Ishioka'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. Michael Ishioka is an internist in Kailua, Hawaii
Dr. Ishioka practices at Adventist Health Castle in Kailua, Hawaii, part of Adventist Health.
Dr. Ishioka's NPI, 1811085400, was assigned on October 10, 2006. Dr. Ishioka graduated from University of Michigan Medical School in 1975. Dr. Ishioka holds Hawaii license MD-3260.
- NPI
- 1811085400NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2567416704
- NPI enumeration date
- October 10, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (808) 263-5015
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 77
- Medical school graduation
- 1975
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Michael Ishioka practices at Adventist Health Castle in Kailua, Hawaii
Dr. Ishioka's primary practice is Adventist Health Castle, at 640 Ulukahiki St, Kailua, HI 96734 in Honolulu County. The practice phone is (808) 263-5015.
- Adventist Health Castle640 Ulukahiki St, Kailua, HI 96734 · Honolulu CountyPhone(808) 263-5015
Source: Dmand AI Affiliation Data
Dr. Michael Ishioka is affiliated with 10 sites of care and 2 medical groups
Dr. Ishioka's primary practice is Adventist Health Castle in Kailua, Hawaii, part of Adventist Health. Dr. Ishioka is also affiliated with The Queen's Medical Center. The medical group on file is Adventist Health Castle Medical Center. Dmand AI also links Dr. Ishioka to 3 more hospitals, 3 home health agencies, 2 group practices and clinics and 1 medical group, each named with a free account. Dr. Ishioka's employer is on file too: a hospital.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Michael Ishioka's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Ishioka practices, 10 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Adventist Health Castle | Available with a free account |
| +9 more sites and 1 medical group | 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 Adventist Health and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Michael Ishioka is one of 771 internists in Hawaii
Internal medicine is Dr. Ishioka's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Ishioka is licensed in Hawaii.
Specialties and state licenses
- Internal medicine, HawaiiPrimary
Internists near Dr. Ishioka
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. Michael Ishioka billed Medicare for 770 services in 2024
CMS data shows 770 Medicare services from Dr. Ishioka across 5 procedure codes in 2024, for 285 Medicare patients. Medicare paid $53,003 for them. Every service was in an office.
Dr. Ishioka's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 6442024: 6342%
- Other services
- 2023: 2582024: 12153%
- Tests and treatments
- 2023: 372024: 1559%
Dr. Ishioka compared with the Hawaii median for internists, 2024
- Dr. Ishioka
- Hawaii median
- Medicare services
- 770vs 3422.3 times
- Medicare patients
- 285vs 1282.2 times
- Part D claims
- 4,205vs 6706.3 times
Medians across 699 internists in Hawaii with Dmand AI profiles that report each measure.
Dr. Ishioka'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.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Ishioka and other internists in Hawaii.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Michael Ishioka treated 285 Medicare patients in 2024, average age 77
CMS counts 285 Medicare patients who saw Dr. Ishioka in 2024. The largest group is 65 to 74, with 132 patients. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 0.94, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Ishioka's median patient age at 73, with 49% women.
Dr. Ishioka's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Ishioka's Medicare patients by sex, 2024
- Women13046%
- Men15554%
Chronic conditions among Dr. Ishioka's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Diabetes31%
- Chronic kidney disease26%
- Cancer22%
- Arthritis21%
- Ischemic heart disease21%
- Osteoporosis21%
Share of Medicare patients with each condition. A patient can have several.
Dr. Ishioka's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women49%
- Men51%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Michael Ishioka wrote 4,567 Medicare Part D claims in 2024
In 2024, Dr. Ishioka wrote 4,567 Medicare Part D claims for 490 patients. 89% of them were for generic drugs. CMS names the drug for 4,205 of them, across 60 drugs with 11 or more claims each, at $410,986 in total drug cost. In 2023, CMS named 4,047 claims across 60 drugs.
Dr. Ishioka's Part D claims by kind of drug, 2024
- Generic4,050 claims89%
- Brand-name489 claims11%
- Other28 claims1%
Dr. Ishioka's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Ishioka's Part D claims, 2024
- Antibiotics1%37 of 4,567 claims
- Antipsychotics, patients 65 and over0%12 of 4,567 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 4,0472024: 4,2054%
Drugs named by CMS: 60 in 2024, 60 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Michael Ishioka offers telehealth to Medicare patients
Dr. Ishioka accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Ishioka as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Michael Ishioka received $360 in industry payments from 2016 to 2025
CMS Open Payments shows 13 general payments to Dr. Ishioka from 7 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 60% of the total. Novo Nordisk Inc paid the most, $249.
General payments to Dr. Ishioka by program year, 2016 to 2025
General payments to Dr. Ishioka by kind, 2016 to 2025
- Food and beverage$21860%
- Education$14340%
Companies that paid Dr. Ishioka the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Michael Ishioka graduated from University of Michigan Medical School
Dr. Ishioka graduated from University of Michigan Medical School in 1975.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Michael Ishioka'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) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - 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) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| 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. Michael Ishioka
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. Michael Ishioka's NPI number?
Dr. Michael Ishioka's NPI number is 1811085400. It was assigned on October 10, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Michael Ishioka?
Dr. Michael Ishioka is an internist in Kailua, Hawaii. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Michael Ishioka practice?
Dr. Ishioka practices at 640 Ulukahiki St, Kailua, HI 96734. Dr. Ishioka's primary practice is Adventist Health Castle in Kailua, Hawaii, part of Adventist Health. Dmand AI also links Dr. Ishioka to 3 hospitals, 3 home health agencies, 2 group practices and clinics and 1 medical group.
What is Dr. Michael Ishioka's office phone number?
The practice phone on file for Dr. Ishioka is (808) 263-5015.
What is Dr. Michael Ishioka's medical license number?
Dr. Ishioka holds Hawaii license MD-3260.
Which hospitals is Dr. Michael Ishioka affiliated with?
Dr. Ishioka practices at Adventist Health Castle in Kailua, Hawaii. Dr. Ishioka is also affiliated with The Queen's Medical Center. Dmand AI links Dr. Ishioka to 3 more hospitals.
What medical group is Dr. Michael Ishioka part of?
Dr. Ishioka is linked to Adventist Health Castle Medical Center. Dmand AI links Dr. Ishioka to 1 more medical group.
Does Dr. Michael Ishioka accept Medicare?
Yes. CMS data shows Dr. Ishioka billed Medicare for 770 services in 2024, and Dr. Ishioka accepts Medicare assignment.
Does Dr. Michael Ishioka offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Ishioka as offering telehealth services.
How many Medicare patients does Dr. Michael Ishioka see?
CMS counts 285 Medicare patients who saw Dr. Ishioka in 2024, with an average age of 77.
Show 5 more questionsShow fewer questions
What services does Dr. Michael Ishioka bill to Medicare?
In 2024, Dr. Ishioka's most billed Medicare services were office visit, established patient (99213), medicare service (G0439) and office visit, established patient (99214).
Where did Dr. Michael Ishioka go to medical school?
Dr. Ishioka graduated from University of Michigan Medical School in 1975.
What drugs does Dr. Michael Ishioka prescribe most?
In 2024 Medicare Part D data, Dr. Ishioka's most prescribed drugs by claims were Atorvastatin Calcium, Simvastatin and Amlodipine Besylate.
Has Dr. Michael Ishioka received payments from drug or device companies?
CMS Open Payments shows $360 in general payments to Dr. Ishioka from 7 companies from 2016 to 2025. The largest total came from Novo Nordisk Inc.
How long has Dr. Michael Ishioka been practicing?
Dr. Ishioka graduated from medical school in 1975, 51 years ago.
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