Andrea Tieng, MD Inc
NPI 1013276575 · Gastroenterology Physician · Rancho Cucamonga, CA
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Andrea Tieng, MD Inc is a Gastroenterology Physician organization in Rancho Cucamonga, CA (NPI 1013276575).
Provider details
- NPI number
- 1013276575
- Entity type
- Organization
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Andrea Tieng, MD(909) 255-7200
- License
- A106477 (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
14 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
- 2012-05-03
- Last updated
- 2022-01-25
- Certified
- 2022-01-25
Frequently asked questions
- What is Andrea Tieng, MD Inc's NPI number?
- Andrea Tieng, MD Inc's National Provider Identifier (NPI) is 1013276575, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Andrea Tieng, MD Inc?
- Andrea Tieng, MD Inc is classified in the NPPES registry as Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Andrea Tieng, MD Inc located?
- Andrea Tieng, MD Inc's practice location on file with NPPES is 10801 Foothill Blvd Ste 106, Rancho Cucamonga, CA 91730-7695.
- What is Andrea Tieng, MD Inc's phone number?
- The practice phone number listed in the NPPES registry for Andrea Tieng, MD Inc is (909) 255-7200.
- Does Andrea Tieng, MD Inc accept Medicare?
- Andrea Tieng, MD Inc is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Andrea Tieng, MD Inc?
- The authorized official listed on Andrea Tieng, MD Inc's NPPES record is Andrea Tieng, MD. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Andrea Tieng, MD Inc's NPI active?
- Yes — Andrea Tieng, MD Inc's NPI (1013276575) is active in the NPPES registry as of the last update on 2022-01-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.