UnityPoint Health – Allen Hospital Cardiovascular Center


Number of patients waiting reflects the current number of patients waiting to be seen. This number changes frequently and is not exact.

Hours of Operation

  • Monday: 8:00 AM - 5:00 PM
  • Tuesday: 8:00 AM - 5:00 PM
  • Wednesday: 8:00 AM - 5:00 PM
  • Thursday: 8:00 AM - 5:00 PM
  • Friday: 8:00 AM - 5:00 PM
  • Saturday: Closed
  • Sunday: Closed

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Our Providers

Carrie Marcoux
Carrie Marcoux, ARNP

Electrophysiology, Cardiology

Abdullah Alwahdani
Abdullah Alwahdani, MD

Interventional Cardiology, Cardiology

Paul Okhumale
Paul Okhumale, MD


Manmohan Singh
Manmohan Singh, MD

Interventional Cardiology, Cardiology

Khalil Anouti
Khalil Anouti, MD

Cardiology, Interventional Cardiology

Himanshu Tandon
Himanshu Tandon, MD

Cardiology, Interventional Cardiology

Abbie L Schaa
Abbie L Schaa, ARNP


Joud Dib
Joud Dib, MD

Interventional Cardiology, Cardiology

Lisa Maher
Lisa Maher, ARNP


Micaela Rahm
Micaela Rahm, ARNP


Kari Haislet
Kari Haislet, ARNP


Anticoagulation Clinic

All clinic patients are accepted based on physician referral. Patients are seen by appointment only and receive intensive monitoring and education.

The clinic uses a laboratory device called CoaguChek-II that allows a finger-stick sample of blood to be obtained, which is then analyzed and results produced within one minute. This allows patients to obtain the results of their test before leaving the clinic. Patients also receive education concerning their diagnosis requiring Coumadin therapy – how the drug works, side effects and dietary information.


The anticoagulation clinic is now located at the UnityPoint Health – Allen Hospital Cardiovascular Center at 419 E Donald St. in Waterloo. You may contact the clinic at (319) 888-7604.

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Allen Hospital

Allen Hospital is a 204-bed, not-for-profit community hospital serving the Cedar Valley. Located at 1825 Logan Ave. in Waterloo, Allen Hospital is the busiest hospital in the Cedar Valley. We care for more inpatients, outpatients, emergency patients and cardiac patients than any other hospital in our 10-county service area.

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