Thoo Tan,

Thoo Tan, DO

Obstetrics and Gynecology, Maternity Care, Robotic Surgery, Virtual Visits, Labor and Delivery Care

Primary Contact

641-428-5100

About

At the age of 17, Dr. Thoo Tan left his Malaysian roots to come to America. He was fortunate to be sponsored by welcoming farmers in the Mankato, Minnesota area. He felt like the luckiest kid in the world as he’d have the opportunity to get an education. He graduated from Mankato State University earning a Medical Technologist degree. His curious interest in the medical field led him to attend medical school. Dr. Tan graduated from Des Moines University at the age of 34, proving that you are never to old to achieve your goals.

Dr. Tan’s focus fell upon the OB/GYN field because he wanted to combine his love of surgery with the privilege of delivering babies.

Services & Specialties

Areas of Specialization

  • Obstetrics and Gynecology
  • Maternity Care
  • Robotic Surgery
  • Virtual Visits
  • Labor and Delivery Care

Locations & Contact

Primary Location

MercyOne North Iowa Obstetrics & Gynecology

1010 4th Street SW, Ste 220
Mason City, IA 50401

View hours
Monday
8:00am - 5:00pm
Tuesday
8:00am - 5:00pm
Wednesday
8:00am - 5:00pm
Thursday
8:00am - 5:00pm
Friday
8:00am - 5:00pm
MercyOne North Iowa Obstetrics & Gynecology

MercyOne North Iowa Birth Center

1000 4th Street SW
Mason City, IA 50401

MercyOne North Iowa Birth Center

Education & Certifications

Education

Residency:
Saint Elizabeth Health Center

Medical School:
Des Moines University-Osteopathic Medical Center

Board Certifications

American Board of Obstetrics & Gynecology

Provider Ratings

The following ratings and reviews are based on verified feedback collected from independently administered patient experience surveys. The ratings and comments submitted by patients reflect their own views and opinions. Patient identities are withheld to ensure confidentiality and privacy. Learn More >

4.6 out of 5

(31 ratings)

The Patient Satisfaction Rating is an average of all responses to the care provider related questions shown below from our survey. Patients that are treated in outpatient or hospital environments may receive different surveys, and the volume of responses will vary by question.

9 Reviews

09/25/2025

He is quick, but listens when I talk. Appropriate and personable.

09/25/2025

I have nothing but great things to say about Dr. Tan! Especially in this chaotic world we live in with all the demands, rules, and numerous changes in healthcare. Through all that this physician made me feel heard, understood, and most of all he made me feel like I was a person and not just another body on his schedule for the day!

09/08/2025

He is the only one with whom I feel comfortable discussing my healthcare needs.

07/28/2025

Felt rushed and didn't take time to get to know me and health history

07/17/2025

Questions were answered. I appreciate his attention.

07/11/2025

He treated me with respect and concern for my problem.

07/11/2025

He was very good

07/10/2025

He is an excellent doctor! Top notch 👌

07/02/2025

Very positive
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