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

Andrea Tieng, MD Inc

Organization Gastroenterology Physician · NPI 1013276575

Andrea Tieng, MD Inc is a Gastroenterology Physician in Rancho Cucamonga, California. Licensed in California. Registered with an NPI since 2012.

Licensed in
CA
In the registry since
2012
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

8283 Grove Ave Ste 206
Rancho Cucamonga, CA 91730-3141
Phone: (909) 255-7200
Fax: (909) 255-7215
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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 A106477 (CA)

Record details

NPI number1013276575
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Andrea Tieng — Md · (909) 255-7200
NPI enumeratedMay 3, 2012
Last updated in NPPESJuly 4, 2026
Certification dateJuly 4, 2026
Mailing address8283 Grove Ave Ste 206, Rancho Cucamonga, CA 91730-3141

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