Quick answers
- Which hospitals does Helen H. Lantz work at?
- Medicare's official clinician data lists Helen H. Lantz at 3 hospitals: Ascension SE Wisconsin Hospital, Oconomowoc Memorial Hospital and Waukesha Memorial Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Helen H. Lantz see patients?
- Medicare's clinician data lists 3 practice locations, including Wauwatosa, WI, Waukesha, WI and Oconomowoc, WI. Call before your visit to confirm the address.
- What is Helen H. Lantz's specialty?
- Medicare lists Gastroenterology as the primary specialty, and also Internal Medicine.
- Does Helen H. Lantz accept Medicare assignment?
- Medicare's clinician data says Helen H. Lantz may accept Medicare assignment (as of 2026-10-02). Ask the office whether they accept it for your visit.
- What is the phone number for Helen H. Lantz?
- (414) 454-0600, as listed in official Medicare / NPI Registry data.
- What is Helen H. Lantz's NPI number?
- 1639146301. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Helen H. Lantz works
Medicare's Facility Affiliation Data lists Helen H. Lantz at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Ascension SE Wisconsin HospitalMilwaukee, WI · Acute Care Hospital · CCN 520136
- Oconomowoc Memorial HospitalOconomowoc, WI · Acute Care Hospital · CCN 520062
- Waukesha Memorial HospitalWaukesha, WI · Acute Care Hospital · CCN 520008
Practice locations
Addresses where Helen H. Lantz is enrolled with Medicare (CMS data updated 2026-10-02).
- 1033 N Mayfair Rd, Suite 101Wauwatosa, WI 53226 (414) 454‑0600
- 1111 Delafield St, Suite 321Waukesha, WI 53188 (414) 454‑0600
- 1185 Corporate Ctr Dr, Suite 120Oconomowoc, WI 53066 (414) 454‑0600
Group practices
Medicare enrollment lists Helen H. Lantz as a member of these groups (CMS data updated 2026-10-02).
- Gi Associates LLC55 clinicians in the group
- Gastroenterology Specialists SC30 clinicians in the group
- Milwaukee Gi Specialists SC15 clinicians in the group
Specialties
- Gastroenterologyprimary
- Internal Medicinealso
Other gastroenterologists in Wauwatosa
Clinicians with the same Medicare primary specialty in Wauwatosa, WI — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Alabama School Of Medicine |
| Graduation year | 1998 |
| Gender (as listed) | Female |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1639146301 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians