Marshfield Clinic

Infectious Disease • Wausau, WI • Since 1916

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About

- Marshfield Clinic is a nonprofit health system with 15 U.S. locations, including Marshfield Clinic Wausau, focused on medical care across Wisconsin. - For infectious disease care and appointments at Marshfield Clinic Wausau, you should contact the Wausau campus or check the main site for specialty services, providers, and scheduling. Key action items: - Visit the Marshfield Clinic homepage to locate Wausau-specific services or infectious disease specialists. - Call the main patient access line or the Wausau campus contact to request an infectious disease appointment: - General phone: 800-782- etc. (use the site’s current number) Notes: - Marshfield Clinic operates in northern to western Wisconsin with multiple campuses; use the Wausau location page to find exact infectious disease services and appointment times. - If you need a referral, check whether your insurance requires one and whether telehealth options are available.

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Clinic Type

Infectious Disease

Address

1000 N Oak Ave, Marshfield, Wisconsin 54449, US

Phone

Call:(866) 520-2510

Email

hrhelp@sanfordhealth.org

Opening Hours

Monday-Friday 8 a.m. - 5 p.m.

Website

https://www.marshfieldclinic.org/medical-services/infectious-diseases

Services Offered

Infectious disease care
Infectious disease consultations
Diagnosis and treatment of infections caused by bacteria, viruses, fungi, and parasites
Team-based care
Appointment management online through My Marshfield Clinic
Referral guidance from primary care physicians

Insurance & Payment

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Languages Spoken

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FAQs

When should I see an infectious disease specialist?

You may be referred by your primary care provider when an infection is difficult to diagnose, accompanied by high fever, or not responding to standard treatment. If you don’t have a referral but need help, call us and we’ll guide you to the right next step.

Do I need a referral?

What infections do you treat?

Infectious disease specialists help diagnose and treat infections caused by bacteria, viruses, fungi, and parasites.

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Photos

What Patients Say

Overall sentiment across review platforms: mixed

Birdeye (Urgent Care): 1.4/5 (5 reviews)
Marshfield Clinic (Dr. Rana Nasser): 4.8/5 (33 ratings)

Patients praise

high patient satisfaction scores for specific infectious disease specialists (e.g., 4.8/5 rating for Dr. Rana Nasser)
providers rated highly for communication, concern for questions, and involvement in treatment decisions

Common complaints

complaints regarding billing and insurance issues
negative experiences with urgent care staff and accessibility (e.g., turning away patients close to closing time)
reports of rude or condescending provider behavior in urgent care settings

"My poor son is suffering terribly with a sore throat. Today, we go to the walk-in (open until 6) at 4:52 pm to be told they stopped taking patients at 4:45….7 minutes! We need a throat swab, that’s it. They refused to take him in…as he standing there bawling in pain."

— Birdeye review of Urgent Care Marshfield Clinic Wausau Center

"Provider concern for my questions: 4.9/5; Provider's efforts to include me in treatment decisions: 4.7/5; My likelihood of recommending this provider: 4.8/5."

— Marshfield Clinic patient satisfaction data for Dr. Rana Nasser

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