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InvoiceFlow for Nutritionists and Dietitians: The Complete Billing Guide

Billing for individual packages, corporate wellness, retainer clients, group programs, and superbills

Nutrition practitioners in private practice bill across multiple service models — per-session, package, retainer, corporate, group programs — and often need to produce superbills for HSA/FSA reimbursement. InvoiceFlow handles the complete billing stack for solo practitioners and small group practices.

Individual Session Invoices

For practitioners still billing per session:

Nutrition Counseling Session — [Client Name] — [Date]:

Payment terms for individual sessions: due at time of service (or within 24 hours). Collecting at the session eliminates chasing payments later.

Package Invoices with Installment Billing

Invoice Flow app invoice editor of a nutritionist — twelve weekly consults, a personalized meal plan, a digital recipe pack and a supplement with installment schedule documented
Twelve consults, the meal plan, even the supplement — the whole program on one clear document.

Package pricing is the recommended model for nutrition practices. It commits the client to the full protocol, improves outcomes, and creates predictable revenue.

Nutrition Counseling Package — [Client Name] — [Date]:

Installment schedule (if applicable):

InvoiceFlow generates and sends each installment invoice on the scheduled date. Set it at enrollment; it runs without manual action.

Package Tiers

Build a separate InvoiceFlow template for each tier with pricing and session counts pre-loaded.

Monthly Retainer Invoices

Long-term clients who want ongoing access without booking individual sessions.

Monthly Nutrition Retainer — [Client Name] — [Month Year]:

Set retainer auto-billing once per client. The invoice generates and is sent on the scheduled date every month without manual action.

Corporate Wellness Invoices

Corporate wellness contracts require EIN, W-9 on file, PO numbers, and net-30 terms. These are the invoice requirements of any mid-size or larger employer’s accounts payable process.

Corporate Wellness Services — [Company Name] — [Month Year]:

Billing Period: [Month Year]

Remit to: [Your name], [Credentials] | EIN: [XX-XXXXXXX] PO Number: [PO-####] Payment Terms: Net-30 W-9 on file | [Date submitted]

Critical: Always include your EIN on corporate invoices. Employers pay contractors on the 1099 system. Their AP department cannot create a vendor record or process payment without an EIN. No EIN = delayed or returned payment.

Corporate Wellness Scope Options

Group Program Invoices

Invoice Flow app recurring invoices of a nutritionist — an online UK client coached in GBP and a maintenance client in USD, both billing monthly
London client in pounds, local client in dollars — both bill themselves monthly.

Online cohort programs, workshops, and nutrition courses.

Group Nutrition Program — [Program Name] — [Start Date]:

Payment options:

For corporate group programs:

Superbills for HSA/FSA Reimbursement

Clients using health savings accounts or flexible spending accounts, or seeking out-of-network reimbursement, may request a superbill.

Superbill — [Client Name] — [Date of Service]:

Add note: “This superbill is provided for patient reimbursement documentation. It does not constitute a claim submission to any health insurer.”

Common ICD-10 and CPT codes for nutrition services:

Consult your state dietitian association or a healthcare billing specialist to confirm applicable codes for your credentials and services.

Using InvoiceFlow for Nutrition Practice Billing

Package templates with installments: Build a template for each package tier. Set the installment schedule at enrollment. InvoiceFlow generates and sends the invoices for months 2 and 3 (or 4–6 for longer packages) on the scheduled dates.

Corporate wellness invoicing: Pre-load your EIN and payment terms in your corporate template. Add PO field. Bill net-30. Send by the 1st of each month for services rendered.

Retainer auto-billing: Set each retainer client’s billing date. Invoice generates and sends automatically. No manual action each month.

Superbill generation: Use InvoiceFlow’s detailed invoice format to document ICD-10 and CPT codes, NPI, and session details. Save as PDF for client reimbursement.

Auto-billing: For package and retainer clients, set up recurring invoices. Installment and retainer invoices generate and send automatically; clients pay via the method shown on the invoice.

Download InvoiceFlow. Build package templates for each tier with installment schedules. Set retainers to auto-bill. Add EIN and PO field to your corporate template. The corporate wellness account that called last week — they’re waiting for an invoice their AP can process.

InvoiceFlow is a free Android invoicing app built for small business owners. Send professional nutrition invoices, manage package installments, auto-bill retainer clients, invoice corporate wellness accounts, and generate superbills — all from your phone.