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

Ms. Daryl Ellen Stewart

Behavior Analyst in Walnut Creek, CA · enumerated 2011.

Data current as of Jul 11, 2026 · sourced from CMS NPPES

National Provider Identifier

1043502396

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Ms. Daryl Ellen Stewart

Sex Female

Practice address Walnut Creek, CA, 94597

Phone (925) 407-4724

Enumeration date May 4, 2011

Last updated in NPPES May 4, 2011

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

Taxonomy & licenses

103K00000X Behavior Analyst Behavioral Health & Social Service Providers · License 0-05-1957 (CA) 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 Daryl Stewart?

The National Provider Identifier (NPI) for Daryl Stewart is 1043502396, a Type 1 (individual) record in the CMS NPPES registry.

Where does Daryl Stewart practice?

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

Other providers at this practice address

Browse all →

Andrie Klass Genetic Counselor (M.S.) · Walnut Creek, CA NPI 1306185236 Personcogene LLC Genetic Counselor (M.S.) · Walnut Creek, CA NPI 1063906691 Lightyear Health Clinic California, PC Physical Medicine & Rehabilitation Physician · Walnut Creek, CA NPI 1558968727

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2011-05-04.