Quick answers
- Does Keiichi Kobayashi accept Medicare assignment?
- Medicare's clinician data says Keiichi Kobayashi may accept Medicare assignment (as of October 2, 2026). Ask the office whether they accept it for your visit.
- How many Medicare patients does Keiichi Kobayashi see?
- In 2024, CMS data shows 85 Original Medicare patients and 611 services for Keiichi Kobayashi. This counts Original Medicare only and measures volume, not quality.
- What is Keiichi Kobayashi's NPI number?
- 1134150089. 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 Keiichi Kobayashi, 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 | 85 |
|---|---|
| Services billed to Medicare | 611 |
| Different services or procedures | 48 |
| 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)273 services
- Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)51 services
- Annual depression screening, 5 to 15 minutes (G0444)32 services
- Insertion of needle into vein for collection of blood sample (36415)26 services
- Hemoglobin a1c level (83036)21 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%
- Diabetes33%
- Chronic kidney disease27%
- Osteoporosis22%
- Arthritis16%
Practice locations
Addresses where Keiichi Kobayashi is enrolled with Medicare (CMS data updated October 2, 2026).
- 1441 Kapiolani Blvd, Suite 2000Honolulu, HI 96814 (808) 945‑3719
Group practices
Medicare enrollment lists Keiichi Kobayashi as a member of this group (CMS data updated October 2, 2026).
- St Lukes Clinic-Ala Moana Inc5 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Honolulu
Clinicians with the same Medicare primary specialty in Honolulu, HI — not a recommendation.
Other clinicians in St Lukes Clinic-Ala Moana Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1988 (38 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1134150089 |
| 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