George Lessmann, DO
NPI 1134641384 · Family Medicine Physician · Oshkosh, WI
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
George Lessmann, DO is a Family Medicine Physician provider in Oshkosh, WI (NPI 1134641384).
Provider details
- NPI number
- 1134641384
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- 125.071257 (IL)
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
8 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
169 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 | 84 | $119 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 31 | $122 |
| Administration of Influenza Virus VaccineG0008 | 16 | $30 |
| Admn Sarscov2 Vacc 1 Dose90480 | 14 | $41 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 13 | $85 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'S |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 79 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 229 | 58 |
| Lisinopril | 143 | 35 |
| Losartan Potassium | 124 | 26 |
| Amlodipine Besylate | 105 | 25 |
| Omeprazole | 100 | 28 |
| Gabapentin | 86 | 22 |
| Metformin Hcl |
Practice location
Mailing address
Registry dates
- Enumerated
- 2017-07-10
- Last updated
- 2023-08-28
- Certified
- 2023-08-28
Frequently asked questions
- What is George Lessmann's NPI number?
- George Lessmann's National Provider Identifier (NPI) is 1134641384, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is George Lessmann's specialty?
- George Lessmann is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is George Lessmann located?
- George Lessmann's practice location on file with NPPES is 414 Doctors Ct, Oshkosh, WI 54901-2065.
- What is George Lessmann's phone number?
- The practice phone number listed in the NPPES registry for George Lessmann is (920) 303-8700.
- Does George Lessmann accept Medicare?
- George Lessmann is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is George Lessmann's NPI active?
- Yes — George Lessmann's NPI (1134641384) is active in the NPPES registry as of the last update on 2023-08-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.