Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. on Seng, NP-C

Q: What is the NPI number for On Seng?

The National Provider Identifier (NPI) for On Seng is 1992358162, a Type 1 (individual) record in the CMS NPPES registry.

Family Nurse Practitioner in Cambridge, MA · enumerated 2019 · practices at Cvs Pharmacy Inc.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1992358162

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Registry record

Entity type Individual (Type 1)

Name Mrs. on Seng

Credential NP-C

Sex Female

Practice address 36 White St, Cambridge, MA, 02140

Phone (617) 876-5519

Enumeration date Jul 17, 2019

Last updated in NPPES Dec 31, 2020

Taxonomy & licenses

363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License RN2273053 (MA) Secondary

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License RN2273053 (MA) Primary

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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for On Seng?

The National Provider Identifier (NPI) for On Seng is 1992358162, a Type 1 (individual) record in the CMS NPPES registry.

Where does On Seng practice?

The practice location on file with NPPES is in Cambridge, MA. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-12-31.