Gerald Watanabe, M.D.
NPI 1770660581 · Internal Medicine Physician · Honolulu, HI
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gerald Watanabe, M.D. is a Internal Medicine Physician provider in Honolulu, HI (NPI 1770660581).
Provider details
- NPI number
- 1770660581
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- MD7651 (HI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
328 Medicare services, 2024 (ranked within specialty)
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 methodology.
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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 180 | $133 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 47 | $94 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 45 | $134 |
| Advance Care Planning, First 30 Minutes99497 | 40 | $83 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 16 | $171 |
Typical Medicare-allowed amounts for these services range $83–$171 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, 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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 33 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 106 | 30 |
| Rosuvastatin Calcium | 88 | 29 |
| Losartan Potassium | 88 | 29 |
| Amlodipine Besylate | 84 | 25 |
| Levothyroxine Sodium | 57 | 18 |
| Glipizidebrand: Glipizide Er | 52 | 13 |
| Allopurinol |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-01
- Last updated
- 2015-12-31
Frequently asked questions
- What is Gerald Watanabe's NPI number?
- Gerald Watanabe's National Provider Identifier (NPI) is 1770660581, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gerald Watanabe's specialty?
- Gerald Watanabe is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Gerald Watanabe located?
- Gerald Watanabe's practice location on file with NPPES is 321 N Kuakini St, Honolulu, HI 96817-2362.
- What is Gerald Watanabe's phone number?
- The practice phone number listed in the NPPES registry for Gerald Watanabe is (808) 529-8801.
- Does Gerald Watanabe accept Medicare?
- Gerald Watanabe is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gerald Watanabe's NPI active?
- Yes — Gerald Watanabe's NPI (1770660581) is active in the NPPES registry as of the last update on 2015-12-31.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.