Marcus K. Iwane, M.D.
Internal Medicine Physician · Kapolei, HI
Marcus K. Iwane, M.D. is an internal medicine physician with a practice address in Kapolei, Hawaii, and NPI 1114246188, issued on May 28, 2010. Check the license (Hawaii 16911, as entered in NPPES) on the Hawaii Medical Board; the Medicare figures below come from public CMS files.
- Name
- Marcus K. Iwane
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 16911 HI
Self-reported in NPPES; status is on the state search - Practice location
- 401 Kamokila Bvld, Kapolei, HI 96707
- Phone
- (808) 432-3600
- Enumerated
- May 28, 2010
- Record last updated
- Jun 10, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20140624000015); accepts Medicare assignment
- Medical or professional school
- University Of Hawaii John A. Burns School Of Medicine, 2010
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 902 in Hawaii → Look up another NPI →
Verify Marcus K. Iwane in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersHawaii Medical Board
Search for license 16911Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.6 times the Medicare Part D claims of the average internal medicine physician in 2024
8,319 Medicare Part D claims for 784 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. 350 claims were for opioids.
Most prescribed
- Atorvastatin Calcium984 claims
- Lisinopril517 claims
- Amlodipine Besylate387 claims
- Losartan Potassium366 claims
- Metformin Hcl238 claims
- Allopurinol232 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.
Bills Medicare through one group practice
- Hawaii Permanente Medical Group IncHonolulu, HI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Marcus K. Iwane among 902 internal medicine physician records in Hawaii
Marcus K. Iwane, 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 2010, is newer than 63% of them.
- NPI issued2010 · 63% of these records are older, 35% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 54% of these records are
- Graduated2010 · median 2001 among the 491 with a school on file
- Record last updated2021 · 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).
5 internal medicine physician records list a practice address in Kapolei
They are 5 of the 1,047 NPPES records with a practice address in Kapolei, and 902 internal medicine physician records in Hawaii.
All 902 in Hawaii → Every provider in Kapolei → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Caroline Fernandez, M.D.Kapolei, HI 967071861499915
- Ian Guerrero, M.D.Kapolei, HI 967071639604341
- Ashley Morisako, MDKapolei, HI 967071871152173
- Edward Okimoto, MDKapolei, HI 967071104939289
- Elmer Baysa, MDEwa Beach, HI 967061699829127
- Roui Lorenzo De Castro, M.D.Ewa Beach, HI 967061346777059
- Shruti Deopujari, MBBSEwa Beach, HI 967061831516863
- Jasmine Kelly, MDEwa Beach, HI 967061871090845
Common questions
What is Marcus K. Iwane, M.D.'s NPI number?
Marcus K. Iwane, M.D.'s National Provider Identifier (NPI) is 1114246188, issued on May 28, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Marcus K. Iwane, M.D. located?
The NPPES record lists a practice address at 401 Kamokila Bvld, Kapolei, HI, 96707. Phone: (808) 432-3600. Providers update this record themselves, so call before visiting.
How can I verify Marcus K. Iwane, M.D.'s license?
NPPES lists Hawaii license number 16911, 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 Marcus K. Iwane, M.D. prescribe under Medicare Part D?
In 2024, Marcus K. Iwane, M.D. had 8,319 Medicare Part D claims for 784 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.