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UnityPoint Clinic - Express (Ankeny)

1055 Southwest Oralabor Road
Ankeny, IA 50023

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UnityPoint Clinic - Express (Jordan Creek)

180 Jordan Creek Pkwy
West Des Moines, IA 50266

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UnityPoint Clinic - Express (Waukee)

950 E Hickman Rd
Waukee, IA 50263

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UnityPoint Clinic Behavioral Health Urgent Care - Des Moines

1250 East 9th Street
Des Moines, IA 50316

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UnityPoint Clinic Urgent Care - Altoona

2720 8th Street Southwest
Altoona, IA 50009

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UnityPoint Clinic Urgent Care - Ankeny Medical Park

3625 North Ankeny Boulevard
Ankeny, IA 50023

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UnityPoint Clinic Urgent Care - Ingersoll

2103 Ingersoll Avenue
Des Moines, IA 50312

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UnityPoint Clinic Urgent Care - Merle Hay

4020 Merle Hay Road
Des Moines, IA 50310

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UnityPoint Clinic Urgent Care - Southglen

6520 Southeast 14th Street
Des Moines, IA 50320

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UnityPoint Clinic Urgent Care - Urbandale

5200 NW 100th Street
Urbandale, IA 50322

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Meet our Liver Disease Team

Blake Williams, ARNP, FNP-C

Blake Williams, ARNP, FNP-CBlake completed her undergraduate education at Grand View University and her advanced degree at Maryville University, St. Louis. She is board certified by the American Association of Nurse Practitioners. Her clinical interests include a variety of chronic liver diseases and caring for patients at UnityPoint Health outreach clinics.

Blake also provides services at UnityPoint Health – Grinnell Multi-Specialty Clinic the first Wednesday of each month.

Jennifer Greimann, DNP, AGNP-C

Jennifer Greimann, DNP, AGNP-CJennifer completed her graduate education at Briar Cliff University and received her undergraduate degree from Grand View University. Jennifer's background is in acute care nursing with a strong focus on patient education and care coordination. She is board certified by the American Association of Nurse Practitioners and is a specialized Adult-Gerontology Nurse Practitioner. Her clinical interests include fatty liver disease and cirrhosis. Jennifer is passionate about providing patient-centered care within the Des Moines community.

Jennifer provides services at Clarke County Hospital on the second and third Wednesday of each month.

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We are pleased to have two highly experienced gastroenterologists/hepatologists from Nebraska Medicine who will see patients in our Des Moines outpatient clinic every Friday. Fedja Rochling, MD, and Marco Olivera-Martinez, MD, specialize in the management of advanced liver disease and liver transplantation.

Fedja Rochling, MD

Fedja Rochling, MDDr. Rochling received his medical degree in 1989 from the Royal College of Surgeons in Ireland. He completed an internship at Newcastle General Hospital in England in 1990 and did an internal medicine residency at Baylor College of Medicine in Houston, Texas, from 1990 to 1993. From 1993 to 1995, he completed a hepatology fellowship at The University of Texas Southwestern Medical Center at Dallas and a gastroenterology/hepatology fellowship at the Medical College of Wisconsin in Milwaukee, Wisconsin from 1995 to 1998. 

Dr. Rochling is a professor in the Division of Gastroenterology and Hepatology at the University of Nebraska Medical Center (UNMC).He is certified by the American Board of Internal Medicine in internal medicine, gastroenterology and transplant hepatology. His clinical interests include liver disease, liver cancer and short bowel syndrome.

Marco Olivera-Martinez, MD

Marco Olivera-Martinez, MDDr. Olivera-Martinez received his medical degree in 1987 from La Salle University in Mexico City, Mexico. He completed his internship at Guadalupe Hospital in Mexico City in 1988. He did his internal medicine residency at the Instituto Nacional De Ciencias Médicas y Nutrición in Mexico City from 1989 to 1992; between 1992 and 1995 Dr. Olivera-Martinez completed his gastroenterology fellowship at the Instituto Nacional De Ciencias Médicas y Nutrición and from 1996 to 1998 he completed his transplant hepatology fellowship at UNMC College of Medicine.

Dr. Olivera-Martinez is a professor in the Division of Gastroenterology and Hepatology at UNMC. His clinical interests include liver transplantation, immunosuppression, alcohol induced liver disease and outcomes after liver transplant.