Claudia Altmann, MD
NPI 1386691756 · Infectious Disease Physician · Grafton, WI
Enrolled with Medicare as Practitioner - Infectious Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Claudia Altmann, MD is a Infectious Disease Physician provider in Grafton, WI (NPI 1386691756).
Provider details
- NPI number
- 1386691756
- Entity type
- Individual
- Primary specialty
- Infectious Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 036159003 (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
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
36 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) |
|---|---|---|
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 22 | $170 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 14 | $72 |
Typical Medicare-allowed amounts for these services range $72–$170 (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.
Practice location
Mailing address
Additional practice locations (2)
- 3314 Patriot CtHerrin, IL 62948-3782Phone: (618) 993-1591Fax: (618) 993-1595
- 12203 Corporate PkwyMequon, WI 53092-3388Phone: (262) 387-8200Fax: (262) 387-8271
Registry dates
- Enumerated
- 2006-05-30
- Last updated
- 2023-09-27
- Certified
- 2023-09-27
Frequently asked questions
- What is Claudia Altmann's NPI number?
- Claudia Altmann's National Provider Identifier (NPI) is 1386691756, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Claudia Altmann's specialty?
- Claudia Altmann is listed in the NPPES registry with a primary specialty of Infectious Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Claudia Altmann located?
- Claudia Altmann's practice location on file with NPPES is 975 Port Washington Rd, Grafton, WI 53024-9204.
- What is Claudia Altmann's phone number?
- The practice phone number listed in the NPPES registry for Claudia Altmann is (262) 329-1000.
- Does Claudia Altmann accept Medicare?
- Claudia Altmann is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Claudia Altmann's NPI active?
- Yes — Claudia Altmann's NPI (1386691756) is active in the NPPES registry as of the last update on 2023-09-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.