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Dr. Lewis A. Sierra, MD

Family Medicine

  • (920) 926-8492

Dr. Sierra's Overview

Dr. Lewis A. Sierra graduated from the University of Wisconsin Medical School in 1978. He works in Fond du Lac, WI and specializes in Family Medicine. Dr. Sierra is affiliated with Saint Agnes Hospital.

Dr. Sierra's Experience

Years in Practice: 37

Dr. Sierra's Specialties

Family Medicine

Dr. Sierra's Education & Training

Medical School: University of Wisconsin Medical School; Graduated 1978

Dr. Sierra's Rating

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Overall Rating


  • Explains conditions & treatments
  • Takes time to answer my questions
  • Provides follow-up as needed
  • View All Ratings

Dr. Sierra's Accepted Insurance

  • Aetna Choice POS II
  • Aetna Signature Administrators PPO

Dr. Sierra's Office Information & Appointments

Office Locations

Agnesian Healthcare

145 N Main St
Fond du Lac, WI 54935
(920) 926-8492


Office Hours and Information

Fax: (920) 926-8903

Practice Website: Not Available

Accepting New Patients: Yes

Medicare Accepted: Yes

Medicaid Accepted: Yes

Monday 7:30 AM - 9:00 PM
Tuesday 7:30 AM - 9:00 PM
Wednesday 7:30 AM - 9:00 PM
Thursday 7:30 AM - 9:00 PM
Friday 7:30 AM - 9:00 PM
Saturday 8:30 AM - 5:30 PM
Sunday 8:30 AM - 5:30 PM

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Dr. Sierra's Hospital Affiliations

Office Locations

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