With increasing numbers of measles cases being reported nationally and in Indiana, Franciscan Health is proactively implementing temporary visitor restrictions in some units at its Indiana and Illinois hospitals.


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Eric M. Woo DO, General Surgery
Primary Specialty

General Surgery

Provider Type


Board Certification
  • American Board of Surgery, Surgery

Accepting new patients





Indiana Surgical Associates

Indiana Surgical Associates, Merrillville, IN

101 East 87th Avenue
Suite 420
Merrillville, IN 46410
(219) 769-2041

Indiana Surgical Associates, PC

Indiana Surgical Associates, PC, Michigan City, IN

3500 Franciscan Way
Suite 301
Michigan City, IN 46360
(219) 861-8828

Franciscan Health Crown Point

Franciscan Health Crown Point, Crown Point, IN

1201 South Main Street
Crown Point, IN 46307
(219) 738-2100

Franciscan Health Dyer

Franciscan Health Dyer, Dyer, IN

24 Joliet Street
Dyer, IN 46311
(219) 865-2141

Franciscan Health Hammond

Franciscan Health Hammond, Hammond, IN

5454 Hohman Avenue
Hammond, IN 46320
(219) 932-2300

Franciscan Health Michigan City

Franciscan Health Michigan City, Michigan City, IN

3500 Franciscan Way
Michigan City, IN 46360
(219) 879-8511

  • Medical School
    Chicago College of Osteopathic Medicine
  • Residency
    Midwestern University
Mark A. Mueller MD, General Surgery

Mark A. Mueller, MD

Primary Specialty: General Surgery

Location: Indiana Surgical Associates (Primary)

James Siatras DO, General Surgery

James Siatras, DO

Primary Specialty: General Surgery

Location: Indiana Surgical Associates (Primary)

  • American Board of Surgery, Surgery

The tau symbol represents physicians who are employees of the Franciscan Physician Network, a division of Franciscan Health Inc. All other physicians are independent members of the Medical Staff who choose to practice at a Franciscan Health hospital.

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