Joseph Koo, M.D.
NPI 1457350985 · Infectious Disease Physician · Honolulu, HI
Enrolled with Medicare as Practitioner - Infectious Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Joseph Koo, M.D. is a Infectious Disease Physician provider in Honolulu, HI (NPI 1457350985).
Provider details
- NPI number
- 1457350985
- Entity type
- Individual
- Primary specialty
- Infectious Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- MD-6718 (HI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
1,101 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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 does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 824 | $73 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 166 | $128 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 95 | $123 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 16 | $171 |
Typical Medicare-allowed amounts for these services range $73–$171 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
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) | Beneficiaries |
|---|---|---|
| Azithromycin | 55 | 14 |
| Sulfamethoxazole/Trimethoprimbrand: Sulfamethoxazole-Trimethoprim | 33 | 13 |
| Cefdinir | 26 | — |
| Levofloxacin | 26 | — |
| Ciprofloxacin Hcl | 17 | 12 |
| Doxycycline Hyclate | 14 | — |
| Vancomycin Hcl | 13 | — |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-07-18
- Last updated
- 2023-12-23
- Certified
- 2023-12-23
Frequently asked questions
- What is Joseph Koo's NPI number?
- Joseph Koo's National Provider Identifier (NPI) is 1457350985, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joseph Koo's specialty?
- Joseph Koo is listed in the NPPES registry with a primary specialty of Infectious Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Joseph Koo located?
- Joseph Koo's practice location on file with NPPES is 321 N. Kuakini Street, Suite 715, Honolulu, HI 96817.
- What is Joseph Koo's phone number?
- The practice phone number listed in the NPPES registry for Joseph Koo is (808) 523-6461.
- Does Joseph Koo accept Medicare?
- Joseph Koo is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Joseph Koo's NPI active?
- Yes — Joseph Koo's NPI (1457350985) is active in the NPPES registry as of the last update on 2023-12-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.