Joel Kobayashi, M.D.
NPI 1679671838 · Internal Medicine Physician · Aiea, HI
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Joel Kobayashi, M.D. is a Internal Medicine Physician provider in Aiea, HI (NPI 1679671838).
Provider details
- NPI number
- 1679671838
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 9742 (HI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,662 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 725 | $94 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 246 | $134 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 243 | $130 |
| Advance Care Planning, First 30 Minutes99497 | 218 | $83 |
| Administration of Influenza Virus VaccineG0008 | 107 | $34 |
| Telephone Medical Discussion With Physician, 5-10 Minutes99441 | 44 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 97 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 297 | 82 |
| Pravastatin Sodium | 229 | 65 |
| Amlodipine Besylate | 228 | 63 |
| Simvastatin | 224 | 63 |
| Metoprolol Succinate | 221 | 61 |
| Lisinopril | 213 | 60 |
| Losartan Potassium | 207 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,253 across 62 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-09-20
- Last updated
- 2018-02-15
Frequently asked questions
- What is Joel Kobayashi's NPI number?
- Joel Kobayashi's National Provider Identifier (NPI) is 1679671838, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joel Kobayashi's specialty?
- Joel Kobayashi is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Joel Kobayashi located?
- Joel Kobayashi's practice location on file with NPPES is 98-1247 Kaahumanu St, Aiea, HI 96701-5310.
- What is Joel Kobayashi's phone number?
- The practice phone number listed in the NPPES registry for Joel Kobayashi is (808) 487-5115.
- Does Joel Kobayashi accept Medicare?
- Joel Kobayashi is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Joel Kobayashi's NPI active?
- Yes — Joel Kobayashi's NPI (1679671838) is active in the NPPES registry as of the last update on 2018-02-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.