William Wittman, MD
NPI 1902880511 · Internal Medicine Physician · Oconto Falls, WI
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Wittman, MD is a Internal Medicine Physician provider in Oconto Falls, WI (NPI 1902880511).
Provider details
- NPI number
- 1902880511
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 24066 (WI)
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
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
580 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 | 371 | $72 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 106 | $105 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 51 | $158 |
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231 | 41 | $45 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 11 | $118 |
Typical Medicare-allowed amounts for these services range $45–$158 (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 · 23 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 114 | 29 |
| Furosemide | 87 | 28 |
| Apixabanbrand: Eliquis | 74 | 16 |
| Clopidogrel Bisulfatebrand: Clopidogrel | 66 | 23 |
| Amlodipine Besylate | 59 | 18 |
| Metoprolol Succinate | 49 | 13 |
Practice location
Mailing address
Additional practice locations (2)
- 833 S Main StOconto Falls, WI 54154-1241Phone: (920) 846-3092
- 307 Manor DrSuring, WI 54174-9182Phone: (920) 842-2144Fax: (920) 842-4111
Registry dates
- Enumerated
- 2005-12-06
- Last updated
- 2020-08-24
- Certified
- 2020-08-24
Frequently asked questions
- What is William Wittman's NPI number?
- William Wittman's National Provider Identifier (NPI) is 1902880511, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Wittman's specialty?
- William Wittman is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Wittman located?
- William Wittman's practice location on file with NPPES is 107 E Highland Dr, Oconto Falls, WI 54154-1002.
- What is William Wittman's phone number?
- The practice phone number listed in the NPPES registry for William Wittman is (920) 846-3092.
- Does William Wittman accept Medicare?
- William Wittman is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Wittman's NPI active?
- Yes — William Wittman's NPI (1902880511) is active in the NPPES registry as of the last update on 2020-08-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.