Illinois · private practice guide
Starting a dietitian private practice in Illinois
Illinois licenses dietitian nutritionists (LDN) under the Dietitian Nutritionist Practice Act, administered by IDFPR. Illinois's breach law covers medical and health-insurance information, and the flat 4.95% individual income tax keeps rate math simple.
Credential: Licensed Dietitian Nutritionist (LDN), via IDFPR
Official source: Illinois Department of Financial and Professional Regulation — Dietitian Nutritionist
Credential and scope
- Use “LDN” only with an active IDFPR license. IDFPR publishes the requirements, renewal and continuing-education rules, and a public license lookup.
- Show your LDN number with your NPI on superbills.
Privacy: PIPA and BIPA
- The Personal Information Protection Act (815 ILCS 530) treats medical information and health insurance information as personal information, so a breach involving them triggers Illinois notice duties.
- The Biometric Information Privacy Act (740 ILCS 14) excludes information captured from a patient in a health care setting or collected for treatment, payment or operations under HIPAA. If you use face, voice or fingerprint tools outside that context (for example, marketing or staff time clocks), review BIPA first.
Business and tax
- Illinois taxes individual income at a flat 4.95% (Illinois Department of Revenue), so add it to federal and self-employment tax in your rate calculation.
Every state
Federal rules apply in every state too: the No Surprises Act generally requires a Good Faith Estimate for uninsured or self-pay clients, and HIPAA applies if you transmit health information electronically in connection with standard transactions such as insurance billing. Also check whether your state has joined the Dietitian Licensure Compact before seeing clients across state lines.
Sources checked
- IDFPR — Dietitian Nutritionist
- 740 ILCS 14/10 (BIPA definitions)
- 815 ILCS 530/5 (PIPA definitions)
- Illinois Department of Revenue — income tax rates
Sources last checked October 2026. Laws change; confirm current requirements with the official source before relying on them. This is general information, not legal or tax advice.
IL launch checklist
- ☐ Active IDFPR LDN license
- ☐ Individual NPI
- ☐ Breach-notice plan
- ☐ BIPA review for any non-clinical biometric tool
- ☐ 4.95% state tax in rate math
Free superbill audit →
12-point check before clients file out-of-network claims.
Free rate calculator →
Use your Illinois tax situation to set a sustainable fee.
Questions
Do dietitians need a license in Illinois?
Illinois licenses dietitian nutritionists (LDN) through IDFPR under the Dietitian Nutritionist Practice Act.
Does BIPA apply to dietitians?
BIPA excludes information captured from patients in a health care setting or used for HIPAA treatment, payment or operations. It can still matter for non-clinical uses like biometric time clocks.
Need the paperwork? DietitianDesk has the client agreement, intake form, superbill guide and SOAP templates — from $19.
General information, not legal, tax or billing advice. Laws and board rules change — confirm with the official source above before acting. Last reviewed October 2026.
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