Chad Koyanagi, M.D.
Specialist · Honolulu, HI
Chad Koyanagi, M.D. is a specialist with a practice address in Honolulu, Hawaii, and NPI 1770536088, issued on May 18, 2006. Check the license (Hawaii MD10043, as entered in NPPES) with the Hawaii board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Chad Koyanagi
- Credential
- M.D.
- Primary taxonomy
- Specialist 174400000X
- License number
- MD10043 HI
Self-reported in NPPES; status is on the state search - Practice location
- 677 Ala Moana Blvd, Suite 1025, Honolulu, HI 96813
- Phone
- (808) 535-5975
- Enumerated
- May 18, 2006
- Record last updated
- Jul 13, 2026
- Fax
- (808) 535-5976
- Medicaid ID
- 496259-01 HI
- Medicare enrollment
- Enrolled (PECOS I20050609000667); accepts Medicare assignment
- Medical or professional school
- University Of Hawaii John A. Burns School Of Medicine, 1995
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 677 Ala Moana Blvd, Suite 1025
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Barry Carlton, M.D.Specialist1790736544
- Martina Kamaka, M.D.Specialist1316990625
- Marjorie Mau, M.D.Specialist1710932272
- Eugene Wang, M.D.Specialist1437192663
- Mihae YuSpecialist1891738944
Verify Chad Koyanagi in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Hawaii board licenses this profession
Search for license MD10043Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
74% fewer Medicare Part D claims than the average specialist in 2024
362 Medicare Part D claims for 33 beneficiaries, against an average of 1,380 among the 8,233 providers of this specialty who prescribed in Part D. Brand-name drugs were 41% of claims.
Most prescribed
- Invega Sustenna84 claims
- Olanzapine38 claims
- Quetiapine Fumarate31 claims
- Invega Trinza25 claims
- Bupropion Xl24 claims
- Abilify Maintena20 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 72.5 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $2,235.14
27 payments; by number, the most common kind was food and beverage; the largest payer was Janssen Pharmaceuticals, Inc. The 5,844 providers of this specialty with any payment received $4,760.79 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Castle Medical CenterKailua, HI
- Ihs The Institute For Human Services IncHonolulu, HI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
156 specialist records list a practice address in Honolulu
They are 156 of the 12,408 NPPES records with a practice address in Honolulu, and 350 specialist records in Hawaii.
All 156 in Honolulu → All 350 in Hawaii → Every provider in Honolulu →
Other specialist records in Hawaii
- Jennifer Aberhart, BSC PTKihei, HI1164737805
- Jhoan Acosta, CNAHonolulu, HI1043683725
- Vida AdamsEwa Beach, HI1043080765
- Matthew Adaniya, M.D.Honolulu, HI1407999097
- Iqbal Ahmed, M.D.Honolulu, HI1164472650
- Walter Aipa, LMTHonolulu, HI1386992725
- Sandee AkionaPearl City, HI1528895885
- Elizabeth AlmsLahaina, HI1639484827
- Alicia Ameden, LMTKailua Kona, HI1821120817
- Oluyinka Amon, D.O.Kailua, HI1295196160
Common questions
What is Chad Koyanagi, M.D.'s NPI number?
Chad Koyanagi, M.D.'s National Provider Identifier (NPI) is 1770536088, issued on May 18, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Chad Koyanagi, M.D. located?
The NPPES record lists a practice address at 677 Ala Moana Blvd, Suite 1025, Honolulu, HI, 96813. Phone: (808) 535-5975. Providers update this record themselves, so call before visiting.
How can I verify Chad Koyanagi, M.D.'s license?
NPPES lists Hawaii license number MD10043, as entered by the provider. Search the Hawaii board that licenses this profession; the NPPES record confirms identity only.
How much does Chad Koyanagi, M.D. prescribe under Medicare Part D?
In 2024, Chad Koyanagi, M.D. had 362 Medicare Part D claims for 33 beneficiaries; the average among specialist prescribers was 1,380. Part D covers Medicare prescriptions only.
What is Chad Koyanagi, M.D.'s MIPS final score?
The 2023 MIPS final score is 72.5 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.