1. What every registered dietician invoice must include

A compliant registered dietician invoice has eight parts: your business name and contact info, a unique invoice number, issue date, payment due date, the customer's name and address, an itemized list of work, the total amount due, and accepted payment methods. If you're collecting sales tax, that line is required too.

2. Set your line items

Most registered dieticians structure invoices around these 4 categories:

Initial assessment — billed by flat at a ~$220 default.
Follow-up session — billed by session at a ~$95 default.
Meal-plan package — billed by flat.
Insurance billing — billed by flat.

3. Set payment terms

The standard for registered dieticians is Net 30 — payment due within 30 days of the invoice date.0 Spell out late-fee terms (most states cap monthly late fees around 1.5%) and accepted payment methods on the invoice itself.

4. Licensing & legal disclosures

RD/RDN credential plus state license required in most states. Medical-nutrition-therapy CPT codes for insurance claims.

5. Send and follow up

Send the invoice the same day work is completed (or upon milestone for larger projects). Use software that tracks opens and lets the customer pay by card or bank transfer in one click — the average registered dietician-class invoice gets paid 2× faster when the customer can pay online without leaving their inbox.

Average invoice

$245

Standard terms

Net 30

Typical deposit

BLS code

29-1031

State-by-state registered dietician invoicing guides

State rules differ on sales tax, statutory late fees, and contractor disclosure requirements. Pick your state for a guide tuned to local law.

How to Invoice as a Registered Dietician: Step-by-Step Guide