Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

David Johnstone

Registered Nurse in Boulder, CO · enumerated 2010.

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

National Provider Identifier

1194048801

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Registry record

Entity type Individual (Type 1)

Name David Johnstone

Sex Male

Practice address 1333 Iris Ave, Boulder, CO, 80304

Phone (303) 413-8500

Enumeration date Mar 9, 2010

Last updated in NPPES Mar 9, 2010

Taxonomy & licenses

163W00000X Registered Nurse Nursing Service Providers · License 190220 (CO) 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.

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Frequently asked questions

Where does David Johnstone practice?

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

What is the NPI number for David Johnstone?

The National Provider Identifier (NPI) for David Johnstone is 1194048801, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-03-09.