Man-Siak Mak, M.D., Inc.
NPI 1114115904 · Gastroenterology Physician · Merced, CA
Man-Siak Mak, M.D., Inc. is a Gastroenterology Physician organization in Merced, CA (NPI 1114115904).
Provider details
- NPI number
- 1114115904
- Entity type
- Organization
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Man-Siak Mak, President(209) 722-1565
- License
- A26785 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
18 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-10-05
- Last updated
- 2007-10-05
Frequently asked questions
- What is Man-Siak Mak, M.D., Inc.'s NPI number?
- Man-Siak Mak, M.D., Inc.'s National Provider Identifier (NPI) is 1114115904, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Man-Siak Mak, M.D., Inc.?
- Man-Siak Mak, M.D., Inc. is classified in the NPPES registry as Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Man-Siak Mak, M.D., Inc. located?
- Man-Siak Mak, M.D., Inc.'s practice location on file with NPPES is 3313 M St, Merced, CA 95348-2714.
- What is Man-Siak Mak, M.D., Inc.'s phone number?
- The practice phone number listed in the NPPES registry for Man-Siak Mak, M.D., Inc. is (209) 722-1565.
- Who is the authorized official for Man-Siak Mak, M.D., Inc.?
- The authorized official listed on Man-Siak Mak, M.D., Inc.'s NPPES record is Man-Siak Mak, President. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Man-Siak Mak, M.D., Inc.'s NPI active?
- Yes — Man-Siak Mak, M.D., Inc.'s NPI (1114115904) is active in the NPPES registry as of the last update on 2007-10-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.