Newly Listed Provider — this NPI profile has been added to the NPI registry within the last 90 days.

CLARISSA THANNEN RD, LD
NPI 1558273631
Dietitian, Registered in Springfield, IL

Active since September 22, 2026
751 N RUTLEDGE ST STE 1700, SPRINGFIELD, IL 62702(217) 545-8000 Get Directions Write a Review

NPPES record added: September 22, 2026. Verified against the NPPES registry weekly; last sync: September 27, 2026.

About Clarissa Thannen Rd, Ld NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

CLARISSA THANNEN RD, LD (NPI 1558273631) is an individual dietitian, registered in Springfield, Illinois, licensed in Illinois (164025792) and active in the NPI registry since September 2026.

NPPES Registry Identity

NPI1558273631
Entity TypeIndividualFemale
Primary Taxonomy133V00000X
Provider Legal NameCLARISSA THANNENCredential: RD, LD
Location Address751 N RUTLEDGE ST STE 1700Springfield, IL 62702-4968
Mailing Address751 N Rutledge St Ste 1700Springfield, IL 62702-4968 · (217) 545-8000
Sole ProprietorNo
Enumeration DateSeptember 22, 2026
NPPES CertifiedSeptember 22, 2026
✔ NPI 1558273631 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDietitian, RegisteredDietary & Nutritional Service Providers
Taxonomy Code133V00000X
License✔ Licensed in IL · 164025792
Definition
A Registered Dietitian (RD)/Registered Dietitian Nutritionist (RDN) is an individual uniquely trained in the science of nutrition and practice of dietetics to design and provide medical nutrition therapy (MNT) and other evidence-based applications of the Nutrition Care Process (NCP) that exemplify the profession's systematic approach to providing high quality nutrition care. Registered dietitians provide MNT for the purpose of disease prevention or management, or to treat or rehabilitate an illness, injury, or condition, with the use of specific, indicated physical and cognitive nutrition care services comprised of one or more of the following aspects of the NCP: nutrition assessment/reassessment, nutrition diagnosis, nutrition intervention (e.g., nutrition counseling, therapeutic diet ordering, and nutrition education) and nutrition monitoring and evaluation.
751 N RUTLEDGE ST STE 1700, Springfield, IL 62702

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

Internal Medicine (Endocrinology, Diabetes & Metabolism)
751 N RUTLEDGE ST STE 1700
SPRINGFIELD, IL 62702
Internal Medicine (Pulmonary Disease)
751 N RUTLEDGE ST STE 1700
SPRINGFIELD, IL 62702
Internal Medicine (Endocrinology, Diabetes & Metabolism)
751 N RUTLEDGE ST STE 1700
SPRINGFIELD, IL 62702
Dietitian, Registered
751 N RUTLEDGE ST STE 1700
SPRINGFIELD, IL 62702
Psychiatry & Neurology (Psychiatry)
751 N RUTLEDGE ST STE 1700
SPRINGFIELD, IL 62702
Internal Medicine (Pulmonary Disease)
751 N RUTLEDGE ST STE 1700
SPRINGFIELD, IL 62702
Nurse Practitioner (Gerontology)
751 N RUTLEDGE ST STE 1700
SPRINGFIELD, IL 62702
Internal Medicine (Pulmonary Disease)
751 N RUTLEDGE ST STE 1700
SPRINGFIELD, IL 62702

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Clarissa Thannen's NPI number?

The NPI number for Clarissa Thannen is 1558273631. It was assigned to this individual provider in the NPPES registry on September 22, 2026.

Where is Clarissa Thannen located?

Clarissa Thannen practices at 751 N Rutledge St Ste 1700, Springfield, IL 62702. The listed phone number is (217) 545-8000.

What is Clarissa Thannen's specialty?

The primary specialty registered for this NPI is Dietitian, Registered with taxonomy code 133V00000X.

When was this NPI record last updated?

The NPPES record for Clarissa Thannen was last updated on September 22, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.