Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Thomas Luke Arnell, MD

Otolaryngology Physician in La Jolla, CA · enumerated 2020 · practices at Marsha Reuther M.D., Inc.

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

National Provider Identifier

1649807397

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Registry record

Entity type Individual (Type 1)

Name Thomas Luke Arnell

Credential MD

Sex Male

Practice address 4150 Regents Park Row Ste 345, La Jolla, CA, 92037

Phone (858) 926-7010

Fax (858) 926-7011

Enumeration date Mar 24, 2020

Last updated in NPPES Jul 30, 2025

Taxonomy & licenses

207Y00000X Otolaryngology Physician Allopathic & Osteopathic Physicians · License A203257 (CA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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 NPI 1649807397 active?

Yes, as of the latest NPPES snapshot, NPI 1649807397 is active (record last updated 2025-07-30).

How do I verify Thomas Arnell's NPI record?

Cross-check NPI 1649807397 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-07-30.