Quick answers
- Which hospitals does Ravi K. Viswanathan work at?
- Medicare's official clinician data lists Ravi K. Viswanathan at 2 hospitals: UnityPoint Health - Meriter and University of WI Hospitals & Clinics Authority. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Ravi K. Viswanathan see patients?
- Medicare's clinician data lists 1 practice location in Madison, WI. Call before your visit to confirm the address.
- What is Ravi K. Viswanathan's specialty?
- Medicare lists Allergy/Immunology as the primary specialty, and also Pediatric Medicine.
- Does Ravi K. Viswanathan accept Medicare assignment?
- Yes. Medicare's clinician data says Ravi K. Viswanathan 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 Ravi K. Viswanathan offer telehealth?
- Medicare's clinician data says Ravi K. Viswanathan offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Ravi K. Viswanathan?
- (608) 265-7700, as listed in official Medicare / NPI Registry data.
- What is Ravi K. Viswanathan's NPI number?
- 1326084534. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Ravi K. Viswanathan works
Medicare's Facility Affiliation Data lists Ravi K. Viswanathan at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- UnityPoint Health - MeriterMadison, WI · Acute Care Hospital · CCN 520089
- University of WI Hospitals & Clinics AuthorityMadison, WI · Acute Care Hospital · CCN 520098
Practice locations
Addresses where Ravi K. Viswanathan is enrolled with Medicare (CMS data updated 2026-10-02).
- 451 Junction RdMadison, WI 53717 (608) 265‑7700
Group practices
Medicare enrollment lists Ravi K. Viswanathan as a member of this group (CMS data updated 2026-10-02).
- University of Wisconsin Medical Foundation Inc2,553 clinicians in the group
Specialties
- Allergy/Immunologyprimary
- Pediatric Medicinealso
Other allergist and immunologists in Madison
Clinicians with the same Medicare primary specialty in Madison, WI — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Rush Medical College Of Rush University |
| Graduation year | 2006 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1326084534 |
| 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