NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Sylvia Matherly, C.P.N.P.

Pediatric Nurse Practitioner in Phoenix, AZ · enumerated 2006 · practices at Northwest Cloinic for Children.

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

National Provider Identifier

1811056971

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Sylvia Matherly
Credential C.P.N.P.
Sex Female
Practice address 15420 N 32nd Dr, Phoenix, AZ, 85053
Phone (602) 866-1974
Fax (602) 375-3949
Enumeration date Dec 6, 2006
Last updated in NPPES Sep 23, 2008

Taxonomy & licenses

363LP0200X Pediatric Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License RN114765 (AZ) Primary

Other identifiers

Identifier Type State Issuer
635914 Medicaid AZ -

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

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 Sylvia Matherly?
Sylvia Matherly is registered in NPPES with the primary taxonomy of Pediatric Nurse Practitioner. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-09-23.