Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Mr. David L Ryan, REGISTERED NURSE

Q: What is the NPI number for David Ryan?

The National Provider Identifier (NPI) for David Ryan is 1003580408, a Type 1 (individual) record in the CMS NPPES registry.

Registered Nurse in Bristol, CT · enumerated 2021.

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

National Provider Identifier

1003580408

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Registry record

Entity type Individual (Type 1)

Name Mr. David L Ryan

Credential REGISTERED NURSE

Sex Male

Practice address Bristol, CT, 06010

Phone (860) 793-3500

Enumeration date Aug 9, 2021

Last updated in NPPES Aug 9, 2021

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

163W00000X Registered Nurse Nursing Service Providers · License R53350 (CT) 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 David Ryan?

The National Provider Identifier (NPI) for David Ryan is 1003580408, a Type 1 (individual) record in the CMS NPPES registry.

Where does David Ryan practice?

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

Other providers at this practice address

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Doreen Buttner Clinical Social Worker · Bristol, CT NPI 1295710374 Delbert Hodder Pediatrics Physician · Bristol, CT NPI 1841276318 Ranjit Pandit Pediatrics Physician · Bristol, CT NPI 1215913793 Taraluta Parikh Pediatrics Physician · Bristol, CT NPI 1477539872 The Hope Clinic, LLC Hematology & Oncology Physician · Bristol, CT NPI 1255383907 The Hope Clinic, LLC Durable Medical Equipment & Medical Supplies · Bristol, CT NPI 1235214826 Pediatric Associates, LLC Primary Care Clinic/Center · Bristol, CT NPI 1295920015 Kashmeer Zablan Child & Adolescent Psychiatry Physician · Bristol, CT NPI 1114156486

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-08-09.