Clarissa Thannen, RD, LD

NPI 1558273631 · on the registry since 2026

Practice

Address: 751 N Rutledge St Ste 1700
Springfield, IL 62702
Phone: (217) 545-8000
Organisation at this address: Siu Physicians & Surgeons, Inc
Board Of Trustees Of Southern Illinois University
Inferred from a shared address, not stated in the registry.
Clinicians at this address: 294

Registry record

Primary taxonomy: 133V00000X
133V00000X
Licence states on file: IL
From the registry's licence fields, which are often incomplete.
Sex: Female
Record last updated: 2026-09-22

Source: CMS National Plan and Provider Enumeration System. Registration is not the same as practising, and the registry records no retirement — some people listed here no longer practise. More in Illinois