Quick answers
- Which hospitals does Patrick Litonjua work at?
- Medicare's official clinician data lists Patrick Litonjua at 2 hospitals: Mercy Health System Corp and Mercy Walworth Hospital & Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Patrick Litonjua see patients?
- Medicare's clinician data lists 1 practice location in Janesville, WI. Call before your visit to confirm the address.
- What is Patrick Litonjua's specialty?
- Medicare lists Endocrinology as the primary specialty, and also Internal Medicine.
- Does Patrick Litonjua accept Medicare assignment?
- Yes. Medicare's clinician data says Patrick Litonjua accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- Does Patrick Litonjua offer telehealth?
- Medicare's clinician data says Patrick Litonjua offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Patrick Litonjua?
- (608) 756-7100, as listed in official Medicare / NPI Registry data.
- What is Patrick Litonjua's NPI number?
- 1831297308. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Patrick Litonjua works
Medicare's Facility Affiliation Data lists Patrick Litonjua at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Mercy Health System CorpJanesville, WI · Acute Care Hospital · CCN 520066
- Mercy Walworth Hospital & Medical CenterLake Geneva, WI · Critical Access Hospital · CCN 521357
Practice locations
Addresses where Patrick Litonjua is enrolled with Medicare (CMS data updated 2026-10-02).
- 3524 E Milwaukee StJanesville, WI 53546 (608) 756‑7100
Group practices
Medicare enrollment lists Patrick Litonjua as a member of this group (CMS data updated 2026-10-02).
- Mercy Health System Corporation753 clinicians in the group
Specialties
- Endocrinologyprimary
- Internal Medicinealso
Other endocrinologists in Wisconsin
Clinicians with the same Medicare primary specialty in Wisconsin — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1990 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1831297308 |
| 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