Joseph K. Koo, M.D.
Infectious Disease Physician · Honolulu, HI
Joseph K. Koo, M.D. is an infectious disease physician with a practice address in Honolulu, Hawaii, and NPI 1457350985, issued on Jul 18, 2005. Check the license (Hawaii MD-6718, as entered in NPPES) on the Hawaii Medical Board; the Medicare figures below come from public CMS files.
- Name
- Joseph K. Koo
- Credential
- M.D.
- Primary taxonomy
- Infectious Disease Physician 207RI0200X
- License number
- MD-6718 HI
Self-reported in NPPES; status is on the state search - Practice location
- 321 N. Kuakini Street, Suite 715, Honolulu, HI 96817
- Phone
- (808) 523-6461
- Enumerated
- Jul 18, 2005
- Record last updated
- Dec 23, 2023
- Fax
- (808) 550-0466
- Medicaid ID
- 055439-01 HI
- Medicare enrollment
- Enrolled (PECOS I20070104000459); accepts Medicare assignment
- Medical or professional school
- University Of Hawaii John A. Burns School Of Medicine, 1984
- Entity
- Type 1 · individual
8 nearest infectious disease physician records → All 42 in Hawaii → Look up another NPI →
Verify Joseph K. Koo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersHawaii Medical Board
Search for license MD-6718Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
27% fewer Medicare Part D claims than the average infectious disease physician in 2024
503 Medicare Part D claims for 97 beneficiaries, against an average of 689 among the 7,388 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims.
Most prescribed
- Azithromycin55 claims
- Sulfamethoxazole-Trimethoprim33 claims
- Cefdinir26 claims
- Levofloxacin26 claims
- Ciprofloxacin Hcl17 claims
- Doxycycline Hyclate14 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.
Joseph K. Koo among 42 infectious disease physician records in Hawaii
Joseph K. Koo, M.D. is one of 42 infectious disease physician records with a practice address in Hawaii. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 90% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated1984 · median 2003 among the 29 with a school on file
- Record last updated2023 · 50% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RI0200X and a Hawaii practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Infectious Disease Physician providers in Hawaii
There are 42 infectious disease physician records in Hawaii.
All 42 in Hawaii → Every provider in Honolulu → Infectious Disease Physician nationwide →
The 8 infectious disease physician records with the nearest ZIP codes
- Russell Wong, M.D.Honolulu, HI 968171376573808
- Jonathan Dworkin, M.D.Honolulu, HI 968161699973503
- Rashmi BaragiHonolulu, HI 968191871740936
- Philip Bruno, DOHonolulu, HI 968191972603801
- Sharon Chi, D.O.Honolulu, HI 968191770995912
- Tarquin Collis, MDHonolulu, HI 968191376643189
- Lawrence Eron, MDHonolulu, HI 968191639279201
- Stacie Nishimoto, M.D.Honolulu, HI 968191033538384
Common questions
What is Joseph K. Koo, M.D.'s NPI number?
Joseph K. Koo, M.D.'s National Provider Identifier (NPI) is 1457350985, issued on Jul 18, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Joseph K. Koo, M.D. located?
The NPPES record lists a practice address at 321 N. Kuakini Street, Suite 715, Honolulu, HI, 96817. Phone: (808) 523-6461. Providers update this record themselves, so call before visiting.
How can I verify Joseph K. Koo, M.D.'s license?
NPPES lists Hawaii license number MD-6718, 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 Joseph K. Koo, M.D. prescribe under Medicare Part D?
In 2024, Joseph K. Koo, M.D. had 503 Medicare Part D claims for 97 beneficiaries; the average among infectious disease physician prescribers was 689. 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.