NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Kelly Jean Sieczkowski, IBCLC, LPC

Lactation Consultant (Non-RN) in Downers Grove, IL · enumerated 2021 · practices at Allison Niebes-Davis, Phd., Ltd..

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

National Provider Identifier

1386318012

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Mrs. Kelly Jean Sieczkowski
Credential IBCLC, LPC
Sex Female
Practice address 1327 Butterfield Rd Ste 604, Downers Grove, IL, 60515
Phone (630) 615-0533
Enumeration date Aug 5, 2021
Last updated in NPPES Aug 5, 2021

Taxonomy & licenses

174N00000X Lactation Consultant (Non-RN) Other Service Providers · License L-303480 (IL) Primary
LPC · Licensed Professional Counselor: A licensed mental-health counselor providing psychotherapy. About the LPC 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

What is the NPI number for Kelly Sieczkowski?
The National Provider Identifier (NPI) for Kelly Sieczkowski is 1386318012, a Type 1 (individual) record in the CMS NPPES registry.
Where does Kelly Sieczkowski practice?
The practice location on file with NPPES is in Downers Grove, IL. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-08-05.