William Ansa Otu, M.D
NPI 1346564168 · Hospitalist Physician · Green Bay, WI
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Ansa Otu, M.D is a Hospitalist Physician provider in Green Bay, WI (NPI 1346564168).
Provider details
- NPI number
- 1346564168
- Entity type
- Individual
- Primary specialty
- Hospitalist PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D
- Sex
- Male
- Sole proprietor
- No
- License
- 54003-020 (WI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
16 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
624 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 286 | $73 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 109 | $106 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 97 | $110 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 63 | $120 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 48 | $160 |
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 17 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 48 | 11 |
| Atorvastatin Calcium | 42 | 12 |
| Furosemide | 37 | — |
| Losartan Potassium | 35 | 14 |
| Metoprolol Tartrate | 22 | — |
| Rosuvastatin Calcium | 21 | — |
| Digoxin | 19 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2010-03-23
- Last updated
- 2023-08-09
- Certified
- 2023-08-09
Frequently asked questions
- What is William Ansa Otu's NPI number?
- William Ansa Otu's National Provider Identifier (NPI) is 1346564168, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Ansa Otu's specialty?
- William Ansa Otu is listed in the NPPES registry with a primary specialty of Hospitalist Physician (Allopathic & Osteopathic Physicians).
- Where is William Ansa Otu located?
- William Ansa Otu's practice location on file with NPPES is 2845 Greenbrier Rd, Green Bay, WI 54311-6519.
- What is William Ansa Otu's phone number?
- The practice phone number listed in the NPPES registry for William Ansa Otu is (920) 288-8100.
- Does William Ansa Otu accept Medicare?
- William Ansa Otu is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Ansa Otu's NPI active?
- Yes — William Ansa Otu's NPI (1346564168) is active in the NPPES registry as of the last update on 2023-08-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.