Ken S. Inamasu, M.D.
Emergency Medicine Physician · Honolulu, HI
Ken S. Inamasu, M.D. is an emergency medicine physician with a practice address in Honolulu, Hawaii, and NPI 1154689271, issued on Apr 26, 2012. Check the license (Hawaii 18943, as entered in NPPES) on the Hawaii Medical Board; the Medicare figures below come from public CMS files.
- Name
- Ken S. Inamasu
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 18943 HI
Self-reported in NPPES; status is on the state search - Practice location
- 770 Kapiolani Blvd Ste 705, Honolulu, HI 96813
- Phone
- (808) 597-8778
- Enumerated
- Apr 26, 2012
- Record last updated
- Sep 1, 2023
- Medicare enrollment
- Enrolled (PECOS I20170525002565); accepts Medicare assignment
- Medical or professional school
- University Of Hawaii John A. Burns School Of Medicine, 2012
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 370 in Hawaii → Look up another NPI →
Also registered at 770 Kapiolani Blvd Ste 705
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Sophia Cohen, MDEmergency Medicine Physician1417453002
Verify Ken S. Inamasu in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersHawaii Medical Board
Search for license 18943Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
15% fewer Medicare Part D claims than the average emergency medicine physician in 2024
192 Medicare Part D claims for 142 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims.
Most prescribed
- Cefdinir19 claims
- Cephalexin17 claims
- Cefadroxil14 claims
- Prednisone14 claims
- Doxycycline Hyclate13 claims
- Amoxicillin-Clavulanate Potass11 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- The Emergency Group, Inc.Honolulu, HI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ken S. Inamasu among 370 emergency medicine physician records in Hawaii
Ken S. Inamasu, M.D. is one of 370 emergency medicine physician records with a practice address in Hawaii. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 64% of them.
- NPI issued2012 · 64% of these records are older, 33% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 55% of these records are
- Graduated2012 · median 2012 among the 202 with a school on file
- Record last updated2023 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Hawaii practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
161 emergency medicine physician records list a practice address in Honolulu
They are 161 of the 12,408 NPPES records with a practice address in Honolulu, and 370 emergency medicine physician records in Hawaii.
All 370 in Hawaii → Every provider in Honolulu → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Vijak Ayasanonda, M.D.Honolulu, HI 968131346285582
- Monte Elias, M.D.Honolulu, HI 968131821024985
- Mark Flanagan, DOHonolulu, HI 968131679559132
- Lily Gallagher, M.D.Honolulu, HI 968131538198916
- Ramsey Hasan, MDHonolulu, HI 968131184662256
- Matt Ing, M.D.Honolulu, HI 968131295770881
- Eric Klemmer, M.D.Honolulu, HI 968131346276052
- Dale Oda, M.D.Honolulu, HI 968131831126556
Common questions
What is Ken S. Inamasu, M.D.'s NPI number?
Ken S. Inamasu, M.D.'s National Provider Identifier (NPI) is 1154689271, issued on Apr 26, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Ken S. Inamasu, M.D. located?
The NPPES record lists a practice address at 770 Kapiolani Blvd Ste 705, Honolulu, HI, 96813. Phone: (808) 597-8778. Providers update this record themselves, so call before visiting.
How can I verify Ken S. Inamasu, M.D.'s license?
NPPES lists Hawaii license number 18943, as entered by the provider. Search the Hawaii Medical Board at https://cca.hawaii.gov/pvl/boards/medical/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Ken S. Inamasu, M.D. prescribe under Medicare Part D?
In 2024, Ken S. Inamasu, M.D. had 192 Medicare Part D claims for 142 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.