Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

John C Karvelas, RRT

Critical Care Registered Respiratory Therapist in Danvers, MA · enumerated 2021.

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

National Provider Identifier

1730754276

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Registry record

Entity type Individual (Type 1)

Name John C Karvelas

Credential RRT

Sex Male

Practice address 132 Collins St Unit 1, Danvers, MA, 01923

Phone (617) 771-9142

Enumeration date May 26, 2021

Last updated in NPPES Jul 26, 2026

Taxonomy & licenses

2279C0205X Critical Care Registered Respiratory Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 1423 (NH) 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 John Karvelas?

The National Provider Identifier (NPI) for John Karvelas is 1730754276, a Type 1 (individual) record in the CMS NPPES registry.

Where does John Karvelas practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-07-26.