DR. DIANA YING WU MD
NPI 1548437395
Internal Medicine - Gastroenterology in Providence, RI
About Dr. Diana Ying Wu Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. DIANA YING WU MD (NPI 1548437395) is an individual gastroenterology provider in Providence, Rhode Island, licensed in Rhode Island (MD14555) and active in the NPI registry since May 2008. She is enrolled in Medicare PECOS and is a graduate of Harvard Medical School (2007).
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Diana Ying Wu Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show Diana Wu reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Stockton, CA 95210
- Reassigned Medicare billing, California enrollment
- 20,078 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02905 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 8
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
PROVIDENCE, RI 02905
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Diana Wu's NPI number?
The NPI number for Diana Wu is 1548437395. It was assigned to this individual provider in the NPPES registry on May 12, 2008. The provider is also known as Dr. Ying Diana Wu MD.
Where is Diana Wu located?
Diana Wu practices at 100 Dudley St, Providence, RI 02905. The listed phone number is (617) 756-5711.
What is Diana Wu's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.
Is Diana Wu enrolled in Medicare?
Yes. Diana Wu is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for Diana Wu's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Diana Wu reassigns Medicare benefits to Permanente Medical Group Inc (Stockton, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Diana Wu's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Diana Wu was last updated on February 11, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Diana Ying Wu, MD · NPI 1548437395
Gastroenterology physician in Providence, Rhode Island. Individual provider, active in the CMS NPPES registry since May 12, 2008.
## Identity
- **NPI:** 1548437395 (Entity type: Individual)
- **Enumerated:** May 12, 2008
- **Primary specialty:** Internal Medicine - Gastroenterology · taxonomy 207RG0100X
- **State license:** MD14555 (Rhode Island)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 100 DUDLEY ST, Providence, RI 02905-3233
- **Phone:** (617) 756-5711
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Permanente Medical Group Inc (NPI 1548343510, Stockton, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Harvard Medical School, class of 2007
## Record status
- **NPPES last updated:** February 11, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1548437395) · Data from the CMS NPPES public registry.