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

Dr. Colleen Ann Larkin, DNP, CPNP-PC

Nurse Practitioner in Oak Lawn, IL · enumerated 2019.

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

National Provider Identifier

1669937231

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Registry record

Entity type Individual (Type 1)

Name Dr. Colleen Ann Larkin

Credential DNP, CPNP-PC

Sex Female

Practice address Oak Lawn, IL, 60453

Phone (708) 684-2016

Fax (708) 684-4808

Enumeration date Feb 7, 2019

Last updated in NPPES Jan 27, 2025

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

Taxonomy & licenses

363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 209-018705 (IL) Primary

363LP0200X Pediatric Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 209018705 (IL) Secondary

DNP · Doctor of Nursing Practice: A clinical doctorate for advanced practice nurses. About the DNP credential

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

Where does Colleen Larkin practice?

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

What is the NPI number for Colleen Larkin?

The National Provider Identifier (NPI) for Colleen Larkin is 1669937231, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Karen Petracek Physician Assistant · Oak Lawn, IL NPI 1720161110 Manish Raiji Pediatric Surgery Physician · Oak Lawn, IL NPI 1437310455 Ellen Mcconnell Physician Assistant · Oak Lawn, IL NPI 1033583562 Johnny Contreras Physician Assistant · Oak Lawn, IL NPI 1982175691 Brittany Lawler Nurse Practitioner · Oak Lawn, IL NPI 1770131989 Sarah Cannon Pediatric Nurse Practitioner · Oak Lawn, IL NPI 1952952467 Tiffany Snow Physician Assistant · Oak Lawn, IL NPI 1104681808

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-01-27.