Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Yuanyuan Yu, MSW
Social Worker in Upper Darby, PA · enumerated 2017.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1619405131
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Registry record
Entity type Individual (Type 1)
Name Yuanyuan Yu
Credential MSW
Sex Female
Practice address 6787 Market St, Upper Darby, PA, 19082
Phone (215) 593-7768
Fax (610) 352-8001
Enumeration date May 29, 2017
Last updated in NPPES Jul 21, 2022
Taxonomy & licenses
104100000X Social Worker Behavioral Health & Social Service Providers · License SW134526 (PA) Primary
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 103328971 | Medicaid | PA | - |
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.
Frequently asked questions
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Yuanyuan Yu?
Yuanyuan Yu is registered in NPPES with the primary taxonomy of Social Worker. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-07-21.