Chad Koyanagi, M.D.
NPI 1770536088 · Specialist · Honolulu, HI
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Chad Koyanagi, M.D. is a Specialist provider in Honolulu, HI (NPI 1770536088).
Provider details
- NPI number
- 1770536088
- Entity type
- Individual
- Primary specialty
- SpecialistOther Service Providers
- Credential
- M.D.
- Sex
- Male
- License
- MD10043 (HI)
Specialties & taxonomies
Other Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
20 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 11 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Paliperidone Palmitatebrand: Invega Sustenna | 84 |
| Olanzapine | 38 |
| Quetiapine Fumarate | 31 |
| Paliperidone Palmitatebrand: Invega Trinza | 25 |
| Bupropion Hclbrand: Bupropion Xl | 24 |
| Aripiprazolebrand: Abilify Maintena | 20 |
| Aripiprazole | 14 |
| Lorazepam | 14 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,235 across 27 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-18
- Last updated
- 2007-07-08
Frequently asked questions
- What is Chad Koyanagi's NPI number?
- Chad Koyanagi's National Provider Identifier (NPI) is 1770536088, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Chad Koyanagi's specialty?
- Chad Koyanagi is listed in the NPPES registry with a primary specialty of Specialist (Other Service Providers).
- Where is Chad Koyanagi located?
- Chad Koyanagi's practice location on file with NPPES is 677 Ala Moana Blvd, Suite 1025, Honolulu, HI 96813-5419.
- What is Chad Koyanagi's phone number?
- The practice phone number listed in the NPPES registry for Chad Koyanagi is (808) 535-5975.
- Does Chad Koyanagi accept Medicare?
- Chad Koyanagi is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Chad Koyanagi's NPI active?
- Yes — Chad Koyanagi's NPI (1770536088) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.