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Harold R. Smith, M.D., Inc

Q: What type of organization is Harold R. Smith, M.D., Inc?

Harold R. Smith, M.D., Inc is registered in NPPES as a Sleep Medicine (Psychiatry & Neurology) Physician (its primary provider taxonomy).

Sleep Medicine (Psychiatry & Neurology) Physician in Irvine, CA · enumerated 2007 · authorized official Harold Smith, President.

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

National Provider Identifier

1932326022

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Registry record

Entity type Organization (Type 2)

Legal business name Harold R. Smith, M.D., Inc

Practice address 4199 Campus Dr Ste 350, Irvine, CA, 92612

Phone (949) 509-7726

Fax (949) 509-7834

Enumeration date Apr 19, 2007

Last updated in NPPES Sep 11, 2025

Taxonomy & classification

2084N0400X Neurology Physician Allopathic & Osteopathic Physicians · License G43052 (CA) Secondary

2084S0012X Sleep Medicine (Psychiatry & Neurology) Physician Allopathic & Osteopathic Physicians · License G43052 (CA) Primary

Authorized official

Name Harold Smith

Title President

Phone (949) 509-7726

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 a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

What type of organization is Harold R. Smith, M.D., Inc?

Harold R. Smith, M.D., Inc is registered in NPPES as a Sleep Medicine (Psychiatry & Neurology) Physician (its primary provider taxonomy).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-11.