Quick answers
- Does Makoto Iwahara accept Medicare assignment?
- Medicare's clinician data says Makoto Iwahara may accept Medicare assignment (as of October 2, 2026). Ask the office whether they accept it for your visit.
- How many Medicare patients does Makoto Iwahara see?
- In 2024, CMS data shows 165 Original Medicare patients and 359 services for Makoto Iwahara. This counts Original Medicare only and measures volume, not quality.
- What is Makoto Iwahara's NPI number?
- 1366627143. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Makoto Iwahara, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 165 |
|---|---|
| Services billed to Medicare | 359 |
| Different services or procedures | 14 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)106 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)72 services
- New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)45 services
- Influenza vaccine, trivalent, split virus, preservative-free, 0.5 ml dosage (90656)26 services
- Administration of influenza virus vaccine (G0008)26 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High cholesterol75%
- High blood pressure64%
- Arthritis37%
- Diabetes25%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)22%
- Ischemic heart disease18%
Practice locations
Addresses where Makoto Iwahara is enrolled with Medicare (CMS data updated October 2, 2026).
- 120 E 79th StNew York, NY 10075 (212) 879‑2328
Specialties
- Gastroenterologyprimary
- Internal Medicinealso
Other gastroenterologists in New York
Clinicians with the same Medicare primary specialty in New York, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1980 (46 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1366627143 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians