Summary

Dr. Man-Siak Mak has practiced gastroenterology and internal medicine for 58 years and is affiliated with Mercy Medical Center. He treats hemorrhoids, colon polyps, and abdominal pain, and performs colonoscopy, lower GI endoscopy, and laparoscopy. He completed his residency at St. Clares Hospital and Healthcare Center and sees patients in Merced, California. He speaks Chinese, English, Portuguese, and Spanish. Patients on Vitals rate Dr. Mak 4.33 out of 5.

Overview based on verified provider data

Quick Facts

  • accepting new patients
  • 4.3
  • 58 years of experience
  • speaks Chinese, English, Portuguese, Spanish
  • St Clares Hospital And Healthcare Center
  • 1 written review
  • 2 specialties
  • 11 areas of expertise
  • 1 hospital affiliation
  • 4 office locations
  • Male

Patients’ Perspective

  • Gave an accurate diagnosis
  • Had a good bedside manner
  • Spent time with me

Office Locations

Dr. Man-Siak Mak has 4 locations

University Surgery Center

1390 E Yosemite Ave Ste BMerced, CA 95340
Mon6:30 am - 5:00 pm
Tue6:30 am - 5:00 pm
Wed6:30 am - 5:00 pm
Thu6:30 am - 5:00 pm
Fri6:30 am - 4:30 pm
SatClosed
SunClosed

Mercy Medical Center

333 Mercy AveMerced, CA 95340

Timothy S Johnston Md And Associates

3170 Collins Dr Ste BMerced, CA 95348
Mon8:00 am - 5:00 pm
Tue8:00 am - 5:00 pm
Wed8:00 am - 5:00 pm
Thu8:00 am - 5:00 pm
Fri8:00 am - 5:00 pm
SatClosed
SunClosed

Timothy S Johnston Md And Associates

410 E Yosemite Ave Ste BMerced, CA 95340
Mon8:00 am - 5:00 pm
Tue8:00 am - 5:00 pm
Wed8:00 am - 5:00 pm
Thu8:00 am - 5:00 pm
Fri8:00 am - 5:00 pm
SatClosed
SunClosed

Compare with Similar Doctors

Dr. Man-Siak Mak, MD
Rebecca Humphries, APRN
Ji Soo Choi, APRN
Chimdi Mfebe, APRN
Dr. Man-Siak Mak, MDRebecca Humphries, APRNJi Soo Choi, APRNChimdi Mfebe, APRN
GastroenterologyGastroenterologyGastroenterologyGastroenterology
Accepts New Patients Accepts New Patients Accepts New Patients Accepts New Patients
4.3 
0 
0 
0 
58 Years of Experience
No Virtual Visit Option Virtual Visit Available Virtual Visit Available Virtual Visit Available
Speaks Chinese, English, Portuguese, Spanish Speaks English Speaks English Speaks English
Merced , CASacramento , CASacramento , CALittle Rock , AR
Med School: Natl Defense Med Ctr Taiwan (244-03 Eff 1/1971) Med School: Emory University Med School: New York University Med School: Chamberlain University College of Nursing
Current Profile
View Profile View Profile View Profile

Insurance Plans Accepted by Dr. Man-Siak Mak

Be sure to verify insurance information directly with your doctor's office, as it may undergo frequent changes.

Medical Specialties

Dr. Man-Siak Mak has the following 2 specialties

Specialty Expertise

Dr. Man-Siak Mak has the following 11 areas of expertise

  • Abdominal Pain
  • Acid Reflux Disease (Gastroesophageal Reflux / GERD)
  • Acid Reflux Disease (GERD)
  • Celiac Disease
  • Colonoscopy
  • Constipation
  • Hemorrhoids
  • Hepatitis C
  • Internal Medicine
  • Irritable Bowel Syndrome (IBS)
  • Ulcerative Colitis

Certifications, License, & Education

58 Years Experience

Dr. Man-Siak Mak holds an active medical license in the state of California.

Medical License

Medical Doctor with an active medical license in the state of California that expires in 2026.

Education & Training

Residency

Completed their residency at St Clares Hospital And Healthcare Center.

Medical School

Graduated from Natl Defense Med Ctr Taiwan (244-03 Eff 1/1971) in 1968.

NPI Number

Dr. Mak's NPI number is 1609875004.

Similar doctors

Frequently Asked Questions

Which hospitals is Dr. Man-Siak Mak affiliated with?
Dr. Man-Siak Mak is affiliated with Mercy Medical Center.
Where is Dr. Man-Siak Mak's office located?
Dr. Man-Siak Mak's office is located at 1390 E Yosemite Ave Ste B, Merced, CA, 95340.
How can I make an appointment with Dr. Man-Siak Mak?
You can find contact information for Dr. Man-Siak Mak here on Vitals.
Is Dr. Man-Siak Mak accepting new patients?
Dr. Man-Siak Mak is accepting new patients on Vitals. View Dr. Man-Siak Mak's profile on Vitals to make an appointment.
Does Dr. Man-Siak Mak accept virtual/telehealth appointments?
Dr. Man-Siak Mak has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.

Data Sources

This provider profile is built using data from:

  • NPPES NPI Registry
  • State medical licensing boards
  • Healthcare system and provider network data

Ensuring Data Transparency and Trust: A Guide to Vitals Doctor Listings and Reviews

Our provider data is gathered directly from physicians and publicly available databases. Providers who verify their profiles gain the ability to update information, offering additional details about their specialties,education, treated conditions, performed procedures, and accepted insurances.

Reviews on Vitals are submitted by users only. Recognizing the valuable insights these reviews offer into a doctor's reputation, we maintain internal policies and protocols to ensure the quality and accuracy of all reviews. Importantly, providers cannot delete or alter reviews independently. Reviews can only be deleted or changed following an internal assessment by our customer service team.

Your feedback is highly valued and we encourage you to contact our support team should you encounter any issues.