Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Constance A Marks, M.D.
Specialist in Joliet, IL · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1831398445
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Registry record
Entity type Individual (Type 1)
Name Dr. Constance A Marks
Credential M.D.
Sex Female
Practice address 1541 Riverboat Center Dr, Joliet, IL, 60431
Phone (815) 741-3825
Fax (815) 741-3263
Enumeration date Jul 13, 2007
Last updated in NPPES Nov 30, 2023
Taxonomy & licenses
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 |
|---|---|---|---|
| 036079703 | Other | IL | STATE LICENSE # |
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.
Frequently asked questions
Is NPI 1831398445 active?
Yes, as of the latest NPPES snapshot, NPI 1831398445 is active (record last updated 2023-11-30).
How do I verify Constance Marks's NPI record?
Cross-check NPI 1831398445 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Other providers at this practice address
Browse all → Ryan Manecke Urology Physician · Joliet, IL NPI 1942289129 Gregory Andros Urology Physician · Joliet, IL NPI 1962481143 Thai Nguyen Urology Physician · Joliet, IL NPI 1386624286 Thomas Burns Urology Physician · Joliet, IL NPI 1003896903 Gregory Lewis Urology Physician · Joliet, IL NPI 1023098910 Paul Desrosiers Radiation Oncology Physician · Joliet, IL NPI 1952379042 Luke Cho Urology Physician · Joliet, IL NPI 1669400933 Uropartners LLC Urology Physician · Joliet, IL NPI 1396758553
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-11-30.