Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Therese Marie Lucietto-Sieradzki, M.D.

Family Medicine Physician in Belvidere, IL · enumerated 2006 · practices at Your Family Doctor, LLC.

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

National Provider Identifier

1699708636

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Registry record

Entity type Individual (Type 1)

Name Dr. Therese Marie Lucietto-Sieradzki

Credential M.D.

Sex Female

Practice address 205 Cadillac Ct Ste 7, Belvidere, IL, 61008

Phone (815) 544-0087

Fax (815) 544-0088

Enumeration date Jul 9, 2006

Last updated in NPPES Jun 24, 2020

Taxonomy & licenses

207QA0401X Addiction Medicine (Family Medicine) Physician Allopathic & Osteopathic Physicians · License 036102862 (IL) Secondary

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 036102862 (IL) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
07132017	Other	IL	BLUE CROSS BLUE SHIELD ID
148976	Other	IL	MEDICARE-RIVERBEND ID
201772810001	Other	IL	MEDICAID RURAL HEALTH ID
036102862	Medicaid	IL	-

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 Therese Lucietto-Sieradzki?

The National Provider Identifier (NPI) for Therese Lucietto-Sieradzki is 1699708636, a Type 1 (individual) record in the CMS NPPES registry.

Where does Therese Lucietto-Sieradzki practice?

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

Other providers at this practice address

Browse all →

Your Family Doctor, LLC Family Medicine Physician · Belvidere, IL NPI 1942219514 Sarah Lyons Family Nurse Practitioner · Belvidere, IL NPI 1568981561

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-06-24.