Carl Chojnacki, APNP
NPI 1043551971 · Nurse Practitioner · Milwaukee, WI
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Carl Chojnacki, APNP is a Nurse Practitioner provider in Milwaukee, WI (NPI 1043551971).
Provider details
- NPI number
- 1043551971
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- APNP
- Sex
- Male
- Sole proprietor
- No
- License
- 5246 (WI)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
13 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
208 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 | 63 | $97 |
| Hemoglobin A1c Level83036 | 49 | $9 |
| Continuous Monitoring of Blood Sugar Level in Tissue Fluid Using Sensor Under Skin With Interpretation and Report95251 | 48 | $26 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 33 | $9 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 15 | $141 |
Typical Medicare-allowed amounts for these services range $9–$141 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote 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 · 45 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Insulin Glargine,hum.rec.anlogbrand: Lantus Solostar | 207 | 95 |
| Levothyroxine Sodium | 147 | 50 |
| Insulin Lisprobrand: Insulin Lispro Kwikpen U-100 | 113 | 59 |
| Insulin Lisprobrand: Humalog Kwikpen U-100 | 110 | 54 |
| Semaglutidebrand: Ozempic | 108 | 33 |
| Metformin Hclbrand: Metformin Hcl Er | 90 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2013-03-01
- Last updated
- 2021-11-30
- Certified
- 2021-11-30
Frequently asked questions
- What is Carl Chojnacki's NPI number?
- Carl Chojnacki's National Provider Identifier (NPI) is 1043551971, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Carl Chojnacki's specialty?
- Carl Chojnacki is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Carl Chojnacki located?
- Carl Chojnacki's practice location on file with NPPES is 2801 W Kinnickinnic River Pkwy, Milwaukee, WI 53215-3669.
- What is Carl Chojnacki's phone number?
- The practice phone number listed in the NPPES registry for Carl Chojnacki is (414) 649-6780.
- Does Carl Chojnacki accept Medicare?
- Carl Chojnacki is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Carl Chojnacki's NPI active?
- Yes — Carl Chojnacki's NPI (1043551971) is active in the NPPES registry as of the last update on 2021-11-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.