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About

Summary: Billings Clinic is a nonprofit, regional health system based in Billings, Montana, serving Montana, Wyoming, and parts of the Dakotas. It offers primary and specialty care across multiple campuses and affiliates, including a 336-bed hospital with a Level I Emergency & Trauma Center, NICU, cancer care unit, surgery center, and MedFlight. The system employs about 1,200 staff and 600 physicians/advanced practitioners across 80+ specialties, and operates as Montana’s and the region’s largest healthcare network. For Infectious Disease care specifically, the clinic provides comprehensive hospital-based and specialty services through its broad physician network, though Kalispell is not listed as a Billings Clinic site in the provided details. If you’re seeking Infectious Disease care in Kalispell, you may need to verify local Billings Clinic affiliations or consider the main Billings Clinic campuses in Montana.

Clinic Type

Infectious Disease

Address

801 North 29th St Billings, MT 59101

Phone

406-238-2500

Email

roih@billingsclinic.org

Opening Hours

Not published — contact the clinic to confirm hours.

Services Offered

  • Infectious disease care
  • Consultations with infectious diseases specialists
  • Wound care for acute and non-healing wounds
  • Treatment for acute and chronic infections
  • Education and care coordination with primary care physicians
  • Collaborative care with other Billings Clinic specialists

Team

  • Patricia I. Rondain, MD, MD — Infectious Diseases
  • Tsun Sheng N. Ku, MD, MD — Infectious Diseases

Insurance & Payment

Languages Spoken

FAQs

What should I do if I need help finding a primary care physician?

If you do not have a primary care physician, call our HealthLine nurses at 406-255-8400 or 1-800-252-1246 for assistance in finding one to meet your needs.

What is infectious diseases care at Billings Clinic?

The physician specialists of Billings Clinic’s Infectious Diseases Department provide comprehensive care for patients with acute and chronic infections due to infectious diseases.

How is patient education handled?

The infectious disease specialists and care team educate each patient on his or her condition in a confidential setting and work with the patient’s primary care physician to provide a treatment plan.

How do patients get referred to infectious diseases specialists?

Your primary care physician will refer you to an infectious diseases specialist.

What should a patient do if they don’t have a primary care physician?

Call HealthLine nurses at 406-255-8400 or 1-800-252-1246 for assistance in finding one that meets their needs.

Social Media

Photos

What Patients Say

Overall sentiment across review platforms: very positive

  • Healthgrades, WebMD, U.S. News & World Report: 5/5 stars (Multiple aggregate ratings (e.g., 3-5 reviews per platform))

Patients praise

  • Professional and courteous staff
  • Thorough diagnostic process
  • Good bedside manner
  • Effective treatment plans

Common complaints

  • None reported in available data

"My first medical visit with Dr. Tjaden was extremely well received. He had not only thoroughly reviewed my medical records that were faxed from my referring infectious disease provider, but had also contacted my former physician by phone to obtain other pertinent information."

Healthgrades patient review

"I would recommend him to family and friends. He goes beyond the usual to figure out what "bug" is doing all the damage. Super bedside manner."

Vitals patient review

Synthesized from public review platforms as of Jul 11, 2026 — sources: [1][2][3][4].

Information sourced from the clinic's website as of July 11, 2026.

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Logan Health Endocrinology & Infectious Disease in Kalispell is part of Logan Health, a nonprofit hospital system headquartered in Kalispell, MT. Logan Health offers specialty services across multiple clinics and hospitals within its service area (13 counties). While the provided details emphasize overall system facilities, there is no explicit standalone Endocrinology & Infectious Disease clinic listing for Kalispell in the extracted highlights. For targeted care in endocrinology or infectious diseases in Kalispell, contact Logan Health directly at (406) 752-5111 or visit logan.org to locate specific clinics, provider directories, and appointment options.

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