Charles Minoru Okamura, M.D.
Internal Medicine Physician · Hilo, HI
Charles Minoru Okamura, M.D. is an internal medicine physician with a practice address in Hilo, Hawaii, and NPI 1427254192, issued on Jun 21, 2007. Check the license (Hawaii 21499, as entered in NPPES) on the Hawaii Medical Board; the Medicare figures below come from public CMS files.
- Name
- Charles Minoru Okamura
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 21499 HI
Self-reported in NPPES; status is on the state search - Practice location
- 670 Ponahawai St Ste 208, Hilo, HI 96720
- Phone
- (808) 935-2112
- Enumerated
- Jun 21, 2007
- Record last updated
- Aug 12, 2024
- Medicare enrollment
- Enrolled (PECOS I20210831001305); accepts Medicare assignment
- Medical or professional school
- New York Medical College, 2007
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 902 in Hawaii → Look up another NPI →
Verify Charles Minoru Okamura in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersHawaii Medical Board
Search for license 21499Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
79% fewer Medicare Part D claims than the average internal medicine physician in 2024
657 Medicare Part D claims for 41 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims. 23 claims were for opioids.
Most prescribed
- Atorvastatin Calcium67 claims
- Gabapentin36 claims
- Losartan Potassium34 claims
- Levothyroxine Sodium33 claims
- Latanoprost28 claims
- Clopidogrel21 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.
Industry payments in 2024: $18.78
1 payment: food and beverage; the largest payer was Amgen Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Charles Minoru Okamura among 902 internal medicine physician records in Hawaii
Charles Minoru Okamura, M.D. is one of 902 internal medicine physician records with a practice address in Hawaii. 71% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 45% of them.
- NPI issued2007 · 45% of these records are older, 43% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 54% of these records are
- Graduated2007 · median 2001 among the 491 with a school on file
- Record last updated2024 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Hawaii practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
34 internal medicine physician records list a practice address in Hilo
They are 34 of the 1,758 NPPES records with a practice address in Hilo, and 902 internal medicine physician records in Hawaii.
All 902 in Hawaii → Every provider in Hilo → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Carlos Abeyta, MDHilo, HI 967201942253109
- Wendy Barnes, MDHilo, HI 967201164534806
- Daniel Belcher, M.D.Hilo, HI 967201144270927
- Francis Cavanaugh, MDHilo, HI 967201033165998
- Alan Desilva, MD INC.Hilo, HI 967201790885994
- Mary Iyer, M.D.Hilo, HI 967201366470502
- David Jung, M.D.Hilo, HI 967201649281643
- Craig Kadooka, M.D.Hilo, HI 967201467419630
Common questions
What is Charles Minoru Okamura, M.D.'s NPI number?
Charles Minoru Okamura, M.D.'s National Provider Identifier (NPI) is 1427254192, issued on Jun 21, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Charles Minoru Okamura, M.D. located?
The NPPES record lists a practice address at 670 Ponahawai St Ste 208, Hilo, HI, 96720. Phone: (808) 935-2112. Providers update this record themselves, so call before visiting.
How can I verify Charles Minoru Okamura, M.D.'s license?
NPPES lists Hawaii license number 21499, 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 Charles Minoru Okamura, M.D. prescribe under Medicare Part D?
In 2024, Charles Minoru Okamura, M.D. had 657 Medicare Part D claims for 41 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.