51 Years of Experience
Affiliated with a Castle Connolly Top Hospital
Who is Dr. Mak, Gastroenterologist in Merced, CA?
Where did Dr. Mak go to medical school and complete their residency?
Residency: Mem Sloan-Kettering Cancer Ctr, Internal Medicine; Bronx-Lebanon Hosp Ctr, Internal Medicine; St Clares Hosp Hlth Ctr, Flexible Or Transitional Year
Medical School: Natl Defense Med Ctr, Taipei, Taiwan
Is Dr. Mak board certified as a Gastroenterologist?
Yes, Dr. Man-Siak Mak, MD is board certified by the American Board of Internal Medicine
What languages does Dr. Mak speak?
Dr. Mak and their clinical team can communicate with patients in the following languages:
- Chinese
- English
What conditions does a Gastroenterologist like Dr. Mak typically treat?
As a Gastroenterologist, Dr. Mak diagnoses, treats, and manages a wide range of conditions. This condition information is derived from anonymized insurance claims and highlights the medical conditions most commonly treated by Dr. Mak. It provides insight into the doctor’s areas of experience and expertise based on real-world patient encounters from the past two years, updated quarterly. Learn more about our claims-based healthcare methodology.
Also known as:
- Colon Cancer Screening
- Health Screening
- Colorectal Cancer Screening (PDQ®)
- Screening Tests to Detect Colorectal Cancer and Polyps
- Tests to Detect Colorectal Cancer and Polyps
- Colorectal Cancer Screening
- Colonoscopy Screening
- Bowel Cancer Screening
ICD-10 Codes:
- Z1211: Encounter for screening for malignant neoplasm of colon
Also known as:
- GERD with Esophagitis
- Acid Reflux
- Eosinophilic Esophagitis
- GERD
- Acid Reflux (GER & GERD) in Adults
- Acid Reflux (GER & GERD) in Children
- Acid Reflux (GER & GERD) in Infants
- Reflux Esophagitis
- Acid Reflux Esophagus Inflammation
- Heartburn with Esophagus Damage
- Gastroesophageal Reflux
- Heartburn
- Indigestion
ICD-10 Codes:
- K2100: Gastro-esophageal reflux disease with esophagitis, without bleeding
- K219: Gastro-esophageal reflux disease without esophagitis
Also known as:
- Rectal Bleeding
- Gastrointestinal Bleeding
- Gastrointestinal (GI) Bleeding
- Anal Bleeding
- Blood in Stool
- Lower GI Bleed
ICD-10 Codes:
- K625: Hemorrhage of anus and rectum
Also known as:
- Constipation
- Difficulty Passing Stool
- Infrequent Bowel Movements
- Hard Stools
ICD-10 Codes:
- K5900: Constipation, unspecified
What procedures does a Gastroenterologist like Dr. Mak typically perform?
As a Gastroenterologist, Dr. Mak performs a variety of medical procedures. This procedure information is derived from anonymized insurance claims and highlights the medical procedures most commonly performed by Dr. Mak. It provides insight into the doctor’s areas of experience and expertise based on real-world patient encounters from the past two years, updated quarterly. Learn more about our claims-based healthcare methodology.
Also known as:
- Diagnostic Colonoscopy with Biopsy
- Colonoscopy with Biopsy
- Colonoscopy with Polyp Removal
- Colonoscopy with Tissue Removal
- Colonoscopy
- Colorectal Cancer Screening Tests
- Flexible Colonoscopy
- Colon Exam with Biopsy
- Lower Endoscopy
- Colon Cancer Screening
- Colon Biopsy
- Large Intestine Scope
- Colorectal Cancer Screening
- Flexible Colonoscopy with Polypectomy
- Colon Polyp Removal
- Colorectal Lesion Excision
- Flexible colonoscopy with EMR
- Endoscopic mucosal resection (colon)
- Colon polyp removal during colonoscopy
CPT Codes:
- 45378: Colonoscopy, flexible; diagnostic, including collection of specimen(s) by brushing or washing, when performed (separate procedure)
- 45380: Colonoscopy, flexible; with biopsy, single or multiple
- 45385: Colonoscopy, flexible; with removal of tumor(s), polyp(s), or other lesion(s) by snare technique
- 45390: Colonoscopy, flexible; with endoscopic mucosal resection
Also known as:
- Upper Endoscopy with Biopsy
- Biopsy
- Endoscopy
- EGD with Biopsy
- Gastroscopy with Biopsy
- Esophagogastroduodenoscopy with Biopsy
CPT Codes:
- 43239: Esophagogastroduodenoscopy, flexible, transoral; with biopsy, single or multiple
Also known as:
- Colonoscopy with Injections
- Colonoscopy
- Colorectal Cancer Screening Tests
- Flexible Colonoscopy with Injection
- Colon Scope with Medication
- Therapeutic Colonoscopy
CPT Codes:
- 45381: Colonoscopy, flexible; with directed submucosal injection(s), any substance
Does Dr. Mak accept my insurance?
Dr. Mak accepts most major insurance plans. Important: Please call our office at (209) 349-8459 before your appointment to verify that your specific plan and network are accepted.
What insurance plans does Dr. Mak accept in Merced, CA?
Dr. Mak in Merced, CA accepts plans from many carriers. While this list is updated regularly, it is not a guarantee of coverage.
Top Insurances
AllCare Health
Blue Shield of California
Cigna Group
Commonwealth Care Alliance
CVS Health (formerly Aetna)
Humana
Santa Cruz County
UnitedHealth Group
View All Insurances
Where is Dr. Mak's office located?
What hospitals are Dr. Mak affiliated with?
Castle Connolly Top Hospital
This doctor is affiliated with a Castle Connolly Top Hospital.
Dr. Mak has admitting privileges at the following hospitals:
What is Dr. Mak's NPI number?A National Provider Identifier (NPI) is a unique ID number that identifies doctors and healthcare providers nationwide.
Dr. Mak's National Provider Identifier (NPI) number is 1609875004.
What common questions do patients ask about Dr. Mak?
Here are answers to patients Frequently Asked Questions (FAQ’s) about Dr. Mak