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Physician Directory

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.

Gender: Male

Languages Spoken: English

Dr. Sierra's Experience

Years in Practice: 37

Conditions Treated by Dr. Sierra

  • Acute pharyngitis
  • Acute bronchitis
  • Acute sinusitis
  • Acute upper respiratory tract infections
  • Skin and subcutaneous tissue infections
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Procedures Performed by Dr. Sierra

  • Electrocardiogram (EKG, ECG)
  • Immunization administration
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Dr. Sierra's Specialties

Family Medicine

Dr. Sierra's Education & Training

Medical School: University of Wisconsin Medical School; Graduated 1978

Dr. Sierra's Accepted Insurance

  • Aetna Choice POS II
  • Aetna Signature Administrators PPO
  • Great West PPO
  • Multiplan PPO
  • UHC Choice Plus POS
  • UHC Navigate HMO
  • UHC Navigate POS
  • UHC Options PPO
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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

Other Physicians in Dr. Sierra's Practice

Dr. Sierra's Hospital Affiliations

Office Locations