Marcus Iwane, M.D.
NPI 1114246188 · Internal Medicine Physician · Kapolei, HI
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marcus Iwane, M.D. is a Internal Medicine Physician provider in Kapolei, HI (NPI 1114246188).
Provider details
- NPI number
- 1114246188
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 16911 (HI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
16 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 | 20 | $121 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 18 | $80 |
Typical Medicare-allowed amounts for these services range $80–$121 (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 · 103 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 984 | 324 |
| Lisinopril | 517 | 177 |
| Amlodipine Besylate | 387 | 134 |
| Losartan Potassium | 366 | 121 |
| Metformin Hcl | 238 | 83 |
| Allopurinol | 232 | 69 |
| Levothyroxine Sodium | 209 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2010-05-28
- Last updated
- 2021-06-10
- Certified
- 2021-05-27
Frequently asked questions
- What is Marcus Iwane's NPI number?
- Marcus Iwane's National Provider Identifier (NPI) is 1114246188, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marcus Iwane's specialty?
- Marcus Iwane is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Marcus Iwane located?
- Marcus Iwane's practice location on file with NPPES is 401 Kamokila Bvld, Kapolei, HI 96707.
- What is Marcus Iwane's phone number?
- The practice phone number listed in the NPPES registry for Marcus Iwane is (808) 432-3600.
- Does Marcus Iwane accept Medicare?
- Marcus Iwane is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marcus Iwane's NPI active?
- Yes — Marcus Iwane's NPI (1114246188) is active in the NPPES registry as of the last update on 2021-06-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.