Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Sonja L Simpson, MS

Assistant Behavior Analyst in Philadelphia, PA · enumerated 2020.

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

National Provider Identifier

1528695863

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Sonja L Simpson

Credential MS

Sex Female

Practice address Philadelphia, PA, 19140

Phone (484) 844-9003

Enumeration date Mar 26, 2020

Last updated in NPPES Feb 25, 2025

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

101YM0800X Mental Health Counselor Behavioral Health & Social Service Providers Secondary

106E00000X Assistant Behavior Analyst Behavioral Health & Social Service Providers · License BH006433 (PA) 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

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 Sonja Simpson?

Sonja Simpson is registered in NPPES with the primary taxonomy of Assistant Behavior Analyst. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-02-25.