Karl Doerfer, MD
NPI 1104245018 · Otology & Neurotology Physician · Milwaukee, WI
Enrolled with Medicare as Practitioner - Otolaryngology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karl Doerfer, MD is a Otology & Neurotology Physician provider in Milwaukee, WI (NPI 1104245018).
Provider details
- NPI number
- 1104245018
- Entity type
- Individual
- Primary specialty
- Otology & Neurotology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 64553 (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 tenure25% of score
12 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
228 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 79 | $61 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 45 | $91 |
| Removal of Impacted Ear Wax69210 | 40 | $29 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 31 | $123 |
| Exam of Ear Using a Microscope92504 | 21 | $8 |
| Incision of Eardrum With Insertion of Eardrum Tube Under Local Or Topical Anesthesia69433 | 12 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 2 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Ciprofloxacin Hcl/Dexamethbrand: Ciprofloxacin-Dexamethasone | 32 | 25 |
| Ofloxacin | 28 | 23 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$264 across 3 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 9000 W Wisconsin AveMilwaukee, WI 53226-4874Phone: (414) 266-2982Fax: (414) 266-6989
Registry dates
- Enumerated
- 2014-04-08
- Last updated
- 2022-10-11
- Certified
- 2022-10-11
Frequently asked questions
- What is Karl Doerfer's NPI number?
- Karl Doerfer's National Provider Identifier (NPI) is 1104245018, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karl Doerfer's specialty?
- Karl Doerfer is listed in the NPPES registry with a primary specialty of Otology & Neurotology Physician (Allopathic & Osteopathic Physicians).
- Where is Karl Doerfer located?
- Karl Doerfer's practice location on file with NPPES is 9200 W Wisconsin Ave Fl 3, Milwaukee, WI 53226-3522.
- What is Karl Doerfer's phone number?
- The practice phone number listed in the NPPES registry for Karl Doerfer is (414) 805-5580.
- Does Karl Doerfer accept Medicare?
- Karl Doerfer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karl Doerfer's NPI active?
- Yes — Karl Doerfer's NPI (1104245018) is active in the NPPES registry as of the last update on 2022-10-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.