Joseph Giannasio, M.D.
NPI 1457560039 · Psychiatry Physician · Kailua, HI
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Joseph Giannasio, M.D. is a Psychiatry Physician provider in Kailua, HI (NPI 1457560039).
Provider details
- NPI number
- 1457560039
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 2966 (HI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
19 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 35 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Olanzapine | 240 | 14 |
| Aripiprazole | 236 | 18 |
| Risperidone | 177 | 12 |
| Benztropine Mesylate | 160 | 15 |
| Divalproex Sodiumbrand: Divalproex Sodium Er | 138 | 12 |
| Trazodone Hcl | 127 | — |
| Fluoxetine Hcl | 126 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$93 across 4 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
- 2007-05-21
- Last updated
- 2007-07-08
Frequently asked questions
- What is Joseph Giannasio's NPI number?
- Joseph Giannasio's National Provider Identifier (NPI) is 1457560039, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joseph Giannasio's specialty?
- Joseph Giannasio is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Joseph Giannasio located?
- Joseph Giannasio's practice location on file with NPPES is 264 Kahako St, Kailua, HI 96734-5904.
- What is Joseph Giannasio's phone number?
- The practice phone number listed in the NPPES registry for Joseph Giannasio is (808) 479-7812.
- Does Joseph Giannasio accept Medicare?
- Joseph Giannasio is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Joseph Giannasio's NPI active?
- Yes — Joseph Giannasio's NPI (1457560039) 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.