Charles Okamura, M.D.
NPI 1427254192 · Internal Medicine Physician · Hilo, HI
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Charles Okamura, M.D. is a Internal Medicine Physician provider in Hilo, HI (NPI 1427254192).
Provider details
- NPI number
- 1427254192
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 21499 (HI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
11 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Advance Care Planning, First 30 Minutes99497 | 11 | $83 |
Typical Medicare-allowed amounts for these services range $83–$83 (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 · 23 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Atorvastatin Calcium | 67 |
| Gabapentin | 36 |
| Losartan Potassium | 34 |
| Levothyroxine Sodium | 33 |
| Latanoprost | 28 |
| Clopidogrel Bisulfatebrand: Clopidogrel | 21 |
| Carvedilol | 18 |
| Insulin Lisprobrand: Insulin Lispro Kwikpen U-100 | 18 |
| Nystatinbrand: Klayesta |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$19 across 1 record (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
Additional practice locations (1)
- 1180 Waianuenue AveHilo, HI 96720-2020Phone: (808) 961-1500
Registry dates
- Enumerated
- 2007-06-21
- Last updated
- 2024-08-12
- Certified
- 2024-03-07
Frequently asked questions
- What is Charles Okamura's NPI number?
- Charles Okamura's National Provider Identifier (NPI) is 1427254192, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Charles Okamura's specialty?
- Charles Okamura is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Charles Okamura located?
- Charles Okamura's practice location on file with NPPES is 670 Ponahawai St Ste 208, Hilo, HI 96720-7830.
- What is Charles Okamura's phone number?
- The practice phone number listed in the NPPES registry for Charles Okamura is (808) 935-2112.
- Does Charles Okamura accept Medicare?
- Charles Okamura is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Charles Okamura's NPI active?
- Yes — Charles Okamura's NPI (1427254192) is active in the NPPES registry as of the last update on 2024-08-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.