NPPES file of Aug 9, 2026

Kristi C. Koyanagi, DDS

General Practice Dentistry · Honolulu, HI

Kristi C. Koyanagi, DDS is a general practice dentistry with a practice address in Honolulu, Hawaii, and NPI 1366115891, issued on Jul 29, 2021. Check the license (Hawaii DT-2922, as entered in NPPES) with the Hawaii board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1366115891
Name
Kristi C. Koyanagi
Credential
DDS
Primary taxonomy
General Practice Dentistry 1223G0001X
License number
DT-2922 HI
Self-reported in NPPES; status is on the state search
Practice location
1060 Young St Ste 305, Honolulu, HI 96814
Phone
(808) 528-1200
Enumerated
Jul 29, 2021
Record last updated
Mar 15, 2022
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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Verify Kristi C. Koyanagi in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Hawaii board licenses this profession
    Search for license DT-2922
    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the Hawaii license search

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61% fewer Medicare Part D claims than the average general practice dentistry in 2024

32 Medicare Part D claims for 24 beneficiaries, against an average of 83 among the 70,290 providers of this specialty who prescribed in Part D.

  1. Kristi Koyanagi32
  2. Specialty average83

Most prescribed

  1. Amoxicillin13 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.

Industry payments in 2024: $1,759.27

28 payments; by number, the most common kind was food and beverage; the largest payer was Patterson Companies, Inc. The 41,669 providers of this specialty with any payment received $597.01 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Kristi Koyanagi$1,759.27
  2. Specialty average$597.01

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Kristi C. Koyanagi among 692 general practice dentistry records in Hawaii

Kristi C. Koyanagi, DDS is one of 692 general practice dentistry records with a practice address in Hawaii. 65% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 92% of them.

  • NPI issued2021 · 92% of these records are older, 6% newer
  • In a Medicare fileYes · 65% of these records are
  • In the CMS Doctors and Clinicians fileNo · under 1% of these records are
  • Record last updated2022 · 77% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 1223G0001X and a Hawaii practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

284 general practice dentistry records list a practice address in Honolulu

They are 284 of the 12,408 NPPES records with a practice address in Honolulu, and 692 general practice dentistry records in Hawaii.

The 8 general practice dentistry records with the nearest ZIP codes

  1. Douglas Chang, D.D.S.Honolulu, HI 968141346289519
  2. Jefferey Hirai, D.M.D.Honolulu, HI 968141679504435
  3. Marsha Iwahiro-Tanabe, DDSHonolulu, HI 968141689672701
  4. Bonnie Lau, DDSHonolulu, HI 968141588661748
  5. Michael Matsushima II, D.D.S.Honolulu, HI 968141750379756
  6. Christina Nguyen, D.M.D.Honolulu, HI 968141003843459
  7. John Okamoto, DDSHonolulu, HI 968141942238043
  8. Rohinton Patel, DMDHonolulu, HI 968141497716591

Common questions

What is Kristi C. Koyanagi, DDS's NPI number?

Kristi C. Koyanagi, DDS's National Provider Identifier (NPI) is 1366115891, issued on Jul 29, 2021. An NPI identifies a provider in billing; it is not a license.

Where is Kristi C. Koyanagi, DDS located?

The NPPES record lists a practice address at 1060 Young St Ste 305, Honolulu, HI, 96814. Phone: (808) 528-1200. Providers update this record themselves, so call before visiting.

How can I verify Kristi C. Koyanagi, DDS's license?

NPPES lists Hawaii license number DT-2922, as entered by the provider. Search the Hawaii board that licenses this profession; the NPPES record confirms identity only.

How much does Kristi C. Koyanagi, DDS prescribe under Medicare Part D?

In 2024, Kristi C. Koyanagi, DDS had 32 Medicare Part D claims for 24 beneficiaries; the average among general practice dentistry prescribers was 83. 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.