Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Addison Maximus Duvall
Behavior Technician in Seattle, WA · enumerated 2022.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1114637535
See something wrong? Report a correction
Registry record
Entity type Individual (Type 1)
Name Addison Maximus Duvall
Sex Male
Practice address 1455 Nw Leary Way Ste 400, Seattle, WA, 98107
Phone (206) 504-3815
Fax (855) 568-2494
Enumeration date Nov 28, 2022
Last updated in NPPES Nov 28, 2022
Taxonomy & licenses
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 NPI 1114637535 active?
Yes, as of the latest NPPES snapshot, NPI 1114637535 is active (record last updated 2022-11-28).
How do I verify Addison Duvall's NPI record?
Cross-check NPI 1114637535 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Other providers at this practice address
Browse all → Sikirat Tinubu-Karch Geriatric Medicine (Family Medicine) Physician · Seattle, WA NPI 1992733638 Alexander Tan Psychiatric/Mental Health Nurse Practitioner · Seattle, WA NPI 1306992698 Daniel Wartenberg Clinical Psychologist · Seattle, WA NPI 1194855858 Courtney Tallman Mental Health Counselor · Seattle, WA NPI 1982726980 Hayden Hamilton Hospice and Palliative Medicine (Physical Medicine & Rehabilitation) Physician · Seattle, WA NPI 1295990216 Nicole Hamlin Medical Physician Assistant · Seattle, WA NPI 1760636435 Stephanie Littell Mental Health Counselor · Seattle, WA NPI 1972739951 Autumn Hinds Mental Health Counselor · Seattle, WA NPI 1962710020
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-11-28.