Active NPI
Eric Mehlhaff, MD
- Internal Medicine Physician
- Madison, WI
National Provider Identifier
1144859745
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Internal Medicine Physician
- License
- 7758520
- Practice address
- 600 Highland Ave
Madison, WI 53792-0001 - Phone
- (608) 263-6400
- NPI assigned
- Apr 6, 2020
- Sex
- Male
- Sole proprietor
- No
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 1
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Internal Medicine Physician | 207R00000X | 7758520 | WI | Primary |
Addresses
Primary practice location
600 Highland Ave
Madison, WI 53792-0001
Mailing address
7974 Uw Health CT
Middleton, WI 53562-5531
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Enrolled in WI
- Eligible to order & refer
- Part B services: Yes
- Medical equipment: Yes
- Home health: Yes
- Power mobility devices: Yes
- Hospice: Yes
Enrollment records 1
| Enrollment ID | State | Provider type | PAC ID | Details |
|---|---|---|---|---|
| I20200709000608 | WI | Order and Referring Only - Internal Medicine | 7517380587 |
Care Compare profile
Medicare Care Compare- Specialty
- Medical Oncology
- Education
- Other, 2020
- Medicare assignment
- May accept Medicare assignment
Practice addresses (Care Compare)
7974 Uw Health CT
Middleton, WI 53562-5531
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
- Credentials
- Doctor of Medicine
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| 7758520 | WI | MD | Internal Medicine Physician |
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1586131200000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1784851200000",
"number": "1144859745",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "7974 UW HEALTH CT",
"city": "MIDDLETON",
"state": "WI",
"postal_code": "535625531"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "600 HIGHLAND AVE",
"city": "MADISON",
"state": "WI",
"postal_code": "537920001",
"telephone_number": "608-263-6400"
}
],
"practiceLocations": [],
"basic": {
"last_name": "MEHLHAFF",
"first_name": "ERIC",
"credential": "MD",
"sole_proprietor": "NO",
"sex": "M",
"enumeration_date": "2020-04-06",
"last_updated": "2026-07-24",
"certification_date": "2026-07-24",
"status": "A"
},
"taxonomies": [
{
"code": "207R00000X",
"taxonomy_group": "",
"desc": "Internal Medicine",
"state": "WI",
"license": "7758520",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in Madison, WI
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 24, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
- Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.