Aaron Choy, MD
NPI 1639380918 · Internal Medicine Physician · Honolulu, HI
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Aaron Choy, MD is a Internal Medicine Physician provider in Honolulu, HI (NPI 1639380918).
Provider details
- NPI number
- 1639380918
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- MDR4584 (HI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 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
38 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 25 | $114 |
| Admn Sarscov2 Vacc 1 Dose90480 | 13 | $45 |
Typical Medicare-allowed amounts for these services range $45–$114 (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 · 99 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 949 | 324 |
| Losartan Potassium | 478 | 161 |
| Amlodipine Besylate | 412 | 143 |
| Lisinopril | 321 | 113 |
| Metformin Hcl | 218 | 73 |
| Empagliflozinbrand: Jardiance | 214 | 65 |
| Simvastatin |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-05-25
- Last updated
- 2021-06-11
- Certified
- 2021-06-11
Frequently asked questions
- What is Aaron Choy's NPI number?
- Aaron Choy's National Provider Identifier (NPI) is 1639380918, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Aaron Choy's specialty?
- Aaron Choy is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Aaron Choy located?
- Aaron Choy's practice location on file with NPPES is 2828 Paa St, Honolulu, HI 96819-4430.
- What is Aaron Choy's phone number?
- The practice phone number listed in the NPPES registry for Aaron Choy is (808) 432-5770.
- Does Aaron Choy accept Medicare?
- Aaron Choy is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Aaron Choy's NPI active?
- Yes — Aaron Choy's NPI (1639380918) is active in the NPPES registry as of the last update on 2021-06-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.