How to Invoice EOPYY (the Greek National Health Fund)
An EOPYY invoice is a B2G invoice with a few extra fields: the AAHT code, the ADA for your provider category and the buyer reference. Here is the full process in 6 steps.
Invoicing EOPYY, the Greek National Health Fund, is no different from issuing any other B2G (public sector) invoice, apart from a few extra fields you need to fill in. Let us walk through the process in detail.
Step 1: Turn on the B2G switch
When you open the new invoice form, turn on the B2G switch to reveal the relevant fields.
Step 2: Select the customer
In the Customer field, select EOPYY from your existing list. If this is a new record, click Add New Customer and fill in the required details.
Step 3: Select the payment method
Choose the payment method (for example On Credit, Cash, etc.).
Step 4: Fill in the B2G fields
Complete the fields the B2G system requires as follows:
- Buyer Reference: EDAPY-Submission Number-Contract Number
- Contracting Authority Name: ΕΘΝΙΚΟΣ ΟΡΓΑΝΙΣΜΟΣ ΠΑΡΟΧΗΣ ΥΠΗΡΕΣΙΩΝ ΥΓΕΙΑΣ (National Organization for the Provision of Health Services)
- AAHT code: 1015.E00460.0001
- ADAM: 0 (zero)
- Budget Type: Other budget
- ADA: depending on your provider category:
- Other Providers and Private Pharmacies (2025): 6ΝΑΞΟΞ7Μ-Η5Ε
- European Citizens (EKAA, 2025): 9Φ4ΠΟΞ7Μ-9ΒΕ
- Chronic Haemodialysis Providers, Covid-19 Emergency Measures (2025): 9ΑΛΝΟΞ7Μ-8ΙΑ
- Payment Due Date: optional, it can stay empty
- Payment Information: mandatory. If you have no specific instruction, enter the payment method (for example On Credit) or a dash (-).
Step 5: Fill in the services
Fill in the required fields for the services you provided, just like on any invoice.
CPV code: the only extra field required by B2G. Fill it in with zero (0).
Step 6: Finish
Once you have made sure every field is filled in correctly, select Save Draft to run a final check, and then select Issue to issue the invoice.
Frequently asked questions
What AAHT code do I use on an invoice to EOPYY?
The EOPYY contracting authority code (AAHT) is 1015.E00460.0001, and the contracting authority name is ΕΘΝΙΚΟΣ ΟΡΓΑΝΙΣΜΟΣ ΠΑΡΟΧΗΣ ΥΠΗΡΕΣΙΩΝ ΥΓΕΙΑΣ, the National Organization for the Provision of Health Services.
What do I enter for ADAM and CPV code on an EOPYY invoice?
Both fields are filled in with zero (0). The CPV code is the only extra field in the services section required by the B2G protocol.
What goes in the Buyer Reference field?
The format EDAPY-Submission Number-Contract Number, meaning your EDAPY submission number followed by your EOPYY contract number.
Do I need a certified e-invoicing provider to invoice EOPYY?
Yes. As a Greek public sector body, EOPYY is invoiced through B2G e-invoicing via a licensed provider (YPAHES). Wrapp is an AADE-certified provider and transmits your invoice automatically to the public sector and to myDATA.
Need help?
If you have a question about this topic or want to make sure everything is set up correctly, contact us and we will look at it together.