Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Man-Siak Mak, MD, Inc

Organization Gastroenterology Physician · NPI 1114115904

Man-Siak Mak, MD, Inc is a Gastroenterology Physician in Merced, California. Licensed in California. Registered with an NPI since 2007.

Licensed in
CA
In the registry since
2007
What do these letters mean?
Inc — Incorporated
A form of business registration, not a clinical qualification.

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Practice location Address checks out

3313 M St
Merced, CA 95348-2714
Phone: (209) 722-1565
Fax: (209) 722-1567
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence A26785 (CA)

Record details

NPI number1114115904
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Man-Siak Mak — President · (209) 722-1565
NPI enumeratedOctober 5, 2007
Last updated in NPPESOctober 5, 2007
Mailing addressPo Box 2793, Merced, CA 95344-0793

Other providers in Merced