Dr. Eric H.n. Kajioka, MD
- Medicare services, 2024
- 1,629
- Medicare patients, 2024
- 334
- Part D claims, 2024
- 615
- MIPS score, 2024
- 96
- Hospital affiliations
- 2
- Practice address
- 91-2141 Ft Weaver Rd, Ewa Beach, HI 96706
- Practice phone
- Call (808) 691-3000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Queens Medical Center - West Oahu
Ewa Beach, Hawaii
Find Dr. Kajioka'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. Eric H.n. Kajioka is an internist in Ewa Beach, Hawaii
Dr. Kajioka practices at Queens Medical Center - West Oahu in Ewa Beach, Hawaii.
Dr. Kajioka's NPI, 1679784904, was assigned on May 25, 2007. Dr. Kajioka graduated from University of Hawaii John A. Burns School of Medicine in 2000. Dr. Kajioka holds Hawaii license 14299.
- NPI
- 1679784904NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0941348155
- NPI enumeration date
- May 25, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (808) 691-3000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 52
- Medical school graduation
- 2000
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Eric H.n. Kajioka practices at Queens Medical Center - West Oahu in Ewa Beach, Hawaii
Dr. Kajioka's primary practice is Queens Medical Center - West Oahu, at 91-2141 Ft Weaver Rd, Ewa Beach, HI 96706 in Honolulu County. The practice phone is (808) 691-3000.
- Queens Medical Center - West Oahu91-2141 Ft Weaver Rd, Ewa Beach, HI 96706 · Honolulu CountyPhone(808) 691-3000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Eric H.n. Kajioka is affiliated with 4 sites of care
Dr. Kajioka's primary practice is Queens Medical Center - West Oahu in Ewa Beach, Hawaii. Dr. Kajioka is also affiliated with The Queen's Medical Center. Dmand AI also links Dr. Kajioka to 1 more hospital and 1 physician office, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Eric H.n. Kajioka's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Kajioka practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Queens Medical Center - West Oahu | Available with a free account |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Eric H.n. Kajioka is one of 771 internists in Hawaii
Internal medicine is Dr. Kajioka's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Kajioka is licensed in Hawaii.
Specialties and state licenses
- Internal medicine, HawaiiPrimary
Internists near Dr. Kajioka
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. Eric H.n. Kajioka billed Medicare for 1,629 services in 2024
CMS data shows 1,629 Medicare services from Dr. Kajioka across 9 procedure codes in 2024, for 334 Medicare patients. Medicare paid $144,796 for them.
Dr. Kajioka's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1,3732024: 1,4818%
- Other services
- 2023: 02024: 148
Where Dr. Kajioka's Medicare services took place, 2024
- In an office40325%
- In a facility1,22675%
Dr. Kajioka compared with the Hawaii median for internists, 2024
- Dr. Kajioka
- Hawaii median
- Medicare services
- 1,629vs 3424.8 times
- Medicare patients
- 334vs 1282.6 times
- Part D claims
- 531vs 67021% below
Medians across 699 internists in Hawaii with Dmand AI profiles that report each measure.
Dr. Kajioka'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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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Eric H.n. Kajioka treated 334 Medicare patients in 2024, average age 74
CMS counts 334 Medicare patients who saw Dr. Kajioka in 2024. The largest group is 65 to 74, with 107 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 25% are also on Medicaid. Their average risk score is 3.21, 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. Kajioka's median patient age at 74, with 45% women.
Dr. Kajioka's Medicare patients by age, 2024
Dr. Kajioka's Medicare patients by sex, 2024
- Women14644%
- Men18856%
Chronic conditions among Dr. Kajioka's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Chronic kidney disease67%
- Diabetes63%
- Ischemic heart disease45%
- Heart failure44%
- Arthritis40%
- Atrial fibrillation34%
Share of Medicare patients with each condition. A patient can have several.
Dr. Kajioka's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 74
Patient panel by sex, all payers
- Women45%
- Men55%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Eric H.n. Kajioka wrote 615 Medicare Part D claims in 2024
In 2024, Dr. Kajioka wrote 615 Medicare Part D claims for 132 patients. 88% of them were for generic drugs. CMS names the drug for 531 of them, across 17 drugs with 11 or more claims each, at $512,626 in total drug cost. In 2023, CMS named 343 claims across 12 drugs.
Dr. Kajioka's Part D claims by kind of drug, 2024
- Generic541 claims88%
- Brand-name74 claims12%
Dr. Kajioka'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. Kajioka's Part D claims, 2024
- Antibiotics88%539 of 615 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: 3432024: 53155%
Drugs named by CMS: 17 in 2024, 12 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. Eric H.n. Kajioka scored 96 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 96 out of 100 for Dr. Kajioka for performance year 2024, reported individually. Dr. Kajioka accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Kajioka as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Dr. Kajioka's MIPS scores, performance year 2024
- 96of 100Final score
- 81.5of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 76of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Eric H.n. Kajioka received $564 in industry payments from 2017 to 2019
CMS Open Payments shows 30 general payments to Dr. Kajioka from 3 drug and device companies from 2017 to 2019. Food and beverage make up the largest share, 96% of the total. Allergan Inc. paid the most, $525.
General payments to Dr. Kajioka by program year, 2017 to 2019
General payments to Dr. Kajioka by kind, 2017 to 2019
- Food and beverage$53996%
- Education$254%
Companies that paid Dr. Kajioka the most, 2017 to 2019
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Eric H.n. Kajioka graduated from University of Hawaii John A. Burns School of Medicine
Dr. Kajioka graduated from University of Hawaii John A. Burns School of Medicine in 2000.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Eric H.n. Kajioka'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand 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)Clinician Public Reporting: Overall MIPS Performance (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. Eric H.n. Kajioka
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. Eric H.n. Kajioka's NPI number?
Dr. Eric H.n. Kajioka's NPI number is 1679784904. It was assigned on May 25, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Eric H.n. Kajioka?
Dr. Eric H.n. Kajioka is an internist in Ewa Beach, Hawaii. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Eric H.n. Kajioka practice?
Dr. Kajioka practices at 91-2141 Ft Weaver Rd, Ewa Beach, HI 96706. Dr. Kajioka's primary practice is Queens Medical Center - West Oahu in Ewa Beach, Hawaii. Dmand AI also links Dr. Kajioka to 1 hospital and 1 physician office.
What is Dr. Eric H.n. Kajioka's office phone number?
The practice phone on file for Dr. Kajioka is (808) 691-3000.
What is Dr. Eric H.n. Kajioka's medical license number?
Dr. Kajioka holds Hawaii license 14299.
Which hospitals is Dr. Eric H.n. Kajioka affiliated with?
Dr. Kajioka is affiliated with The Queen's Medical Center. Dmand AI links Dr. Kajioka to 1 more hospital.
Does Dr. Eric H.n. Kajioka accept Medicare?
Yes. CMS data shows Dr. Kajioka billed Medicare for 1,629 services in 2024, and Dr. Kajioka accepts Medicare assignment.
Does Dr. Eric H.n. Kajioka offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Kajioka as offering telehealth services.
What is Dr. Eric H.n. Kajioka's MIPS score?
Dr. Kajioka's MIPS final score for performance year 2024 is 96 out of 100, reported individually.
How many Medicare patients does Dr. Eric H.n. Kajioka see?
CMS counts 334 Medicare patients who saw Dr. Kajioka in 2024, with an average age of 74.
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What services does Dr. Eric H.n. Kajioka bill to Medicare?
In 2024, Dr. Kajioka's most billed Medicare services were hospital inpatient care (99232), office visit, established patient (99214) and hospital inpatient care (99223).
Where did Dr. Eric H.n. Kajioka go to medical school?
Dr. Kajioka graduated from University of Hawaii John A. Burns School of Medicine in 2000.
What drugs does Dr. Eric H.n. Kajioka prescribe most?
In 2024 Medicare Part D data, Dr. Kajioka's most prescribed drugs by claims were Ertapenem, Ceftriaxone and Meropenem.
Has Dr. Eric H.n. Kajioka received payments from drug or device companies?
CMS Open Payments shows $564 in general payments to Dr. Kajioka from 3 companies from 2017 to 2019. The largest total came from Allergan Inc.
How long has Dr. Eric H.n. Kajioka been practicing?
Dr. Kajioka graduated from medical school in 2000, 26 years ago.
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