Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Carl Isherwood

Registered Nurse in Colton, CA · enumerated 2008.

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

National Provider Identifier

1134390024

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Registry record

Entity type Individual (Type 1)

Name Carl Isherwood

Sex Male

Practice address 400 N Pepper Ave, Colton, CA, 92324

Phone (909) 580-1800

Enumeration date Mar 18, 2008

Last updated in NPPES Apr 27, 2026

Taxonomy & licenses

163W00000X Registered Nurse Nursing Service Providers · License 647959 (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 Carl Isherwood?

The National Provider Identifier (NPI) for Carl Isherwood is 1134390024, a Type 1 (individual) record in the CMS NPPES registry.

Where does Carl Isherwood practice?

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

Other providers at this practice address

Browse all →

Arrowhead Regional Medical Center General Acute Care Hospital · Colton, CA NPI 1790781169 Andrew Lowe Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist · Colton, CA NPI 1225036205 Robertus Kounang Physical Medicine & Rehabilitation Physician · Colton, CA NPI 1689674582 Thet Oo Geriatric Medicine (Internal Medicine) Physician · Colton, CA NPI 1538152095 Paul Lyons Family Medicine Physician · Colton, CA NPI 1588652515 Naghmana Farrukh Pediatrics Physician · Colton, CA NPI 1346230398 Danielle Jones Licensed Vocational Nurse · Colton, CA NPI 1669457768 Kathleen Beam Certified Registered Nurse Anesthetist · Colton, CA NPI 1760467666

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-04-27.