Gregory Kobayashi, MD
NPI 1124038625 · Anatomic Pathology Physician · Honolulu, HI
Enrolled with Medicare as Practitioner - Pathology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Kobayashi, MD is a Anatomic Pathology Physician provider in Honolulu, HI (NPI 1124038625).
Provider details
- NPI number
- 1124038625
- Entity type
- Individual
- Primary specialty
- Anatomic Pathology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 10963 (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
1,198 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) |
|---|---|---|
| Pathology Examination of Tissue Using a Microscope, Intermediate Complexity88305 | 1,071 | $36 |
| Special Stained Specimen Slides to Examine Tissue, Each Additional Procedure88341 | 49 | $27 |
| Cell Examination of Specimen, Concentration Technique88108 | 38 | $21 |
| Evaluation of Fine Needle Aspirate With Interpretation and Report88173 | 24 | $69 |
| Special Stained Specimen Slides to Examine Tissue, Initial Procedure88342 | 16 | $34 |
Typical Medicare-allowed amounts for these services range $21–$69 (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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$23 across 1 record (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
- 2006-08-08
- Last updated
- 2007-07-08
Frequently asked questions
- What is Gregory Kobayashi's NPI number?
- Gregory Kobayashi's National Provider Identifier (NPI) is 1124038625, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Kobayashi's specialty?
- Gregory Kobayashi is listed in the NPPES registry with a primary specialty of Anatomic Pathology Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory Kobayashi located?
- Gregory Kobayashi's practice location on file with NPPES is 347 N Kuakini St, Honolulu, HI 96817-2336.
- What is Gregory Kobayashi's phone number?
- The practice phone number listed in the NPPES registry for Gregory Kobayashi is (808) 547-9496.
- Does Gregory Kobayashi accept Medicare?
- Gregory Kobayashi is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Kobayashi's NPI active?
- Yes — Gregory Kobayashi's NPI (1124038625) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.