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ONPSC 305 A

Cancer Care Ontario CEA Assay Requisition Form

Dynacare asks for this form with every CEA test it draws in Ontario, because the lab is only reimbursed when the test meets Cancer Care Ontario's monitoring criteria. The tick box you choose decides whether the test is funded or the patient receives an invoice.

At a glance

Checked October 2026

Form number
ONPSC 305 A
Issued by
Dynacare (Ontario Patient Services)
Where
Ontario
Completed by
Ordering clinician
Format
Fillable PDF
Language
English

What the ONPSC 305 A is for

The form records why you are ordering a CEA, so Dynacare can claim the test under Cancer Care Ontario’s policy. CEA is funded for monitoring established colorectal cancer and metastatic breast cancer, and not as a general screen. It travels with the usual lab requisition and does not replace it. LifeLabs uses its own CEA requisition for the same criteria.

Who completes it

The ordering clinician completes and signs the whole form. It has no patient section. The patient brings it to the collection centre with the requisition.

How to fill in the form

Patient details

Name, address, and health insurance number. These must match the lab requisition so the authorization attaches to the right specimen.

Reason for ordering

Tick one of four funded reasons: pre-operative for a clinical diagnosis of colorectal cancer, adjuvant therapy or follow-up for stage II or III colorectal cancer, treatment of metastatic colorectal disease, or treatment of metastatic breast cancer. The two metastatic options state that CEA is the most appropriate way to monitor response. If none applies, tick the last box, which tells the lab to proceed and invoice the patient.

Clinician signature

Sign, print your name, and add a telephone number and the date. An unsigned form leaves the test unfunded.

Common reasons it’s sent back

  • No form sent with the requisition, so the lab can’t claim the test.
  • A repeat test less than 28 days after the last one.
  • Metastatic colorectal monitoring repeated more often than every two treatment cycles.
  • No reason ticked, or a reason that doesn’t match the clinical picture.
  • Missing signature or printed name.

Submitting and who pays

The patient takes the form and the requisition to a Dynacare patient service centre. A test that meets a funded criterion costs the patient nothing. A test ordered outside the criteria is invoiced to the patient.

Get the official form

Download the current version from Dynacare (Ontario Patient Services) each time. Forms change without notice, and an old edition can be returned.

Official page ↗ PDF ↗

Medulla Forms

Fill ONPSC 305 A from the visit and the chart.

Upload the fillable PDF to your practice's forms once. Medulla fills it from the visit and the chart open in your EMR, leaves blank anything the record doesn't support, and opens the form for your review. When it's done, save it to the patient's chart in one click.

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Sources for this guide

Questions

Questions we hear a lot.

Is a CEA test covered by OHIP in Ontario?

Only when it meets the Cancer Care Ontario criteria printed on the form: pre-operative colorectal cancer, adjuvant therapy or follow-up for stage II or III colorectal cancer, treatment of metastatic colorectal disease, or treatment of metastatic breast cancer. Outside those, the patient pays.

How often can a funded CEA be repeated?

Not more often than every 28 days. For metastatic colorectal disease the form adds a second limit, not more often than every two cycles of treatment.

Can I order a CEA as a cancer screen?

You can, but it won't be funded. Tick the box that says the patient doesn't meet the criteria, and Dynacare runs the test and invoices the patient.

Do I need this form for every CEA?

Yes. The form says it must go to the laboratory each time a CEA assay is ordered, or the lab isn't reimbursed through the program.

Is patient information secure?

Yes. Medulla has a SOC 2 Type II report from an independent auditor, is HIPAA, PIPEDA, and PHIPA compliant, and is built and hosted in Canada, so patient data stays in the country and never gets pasted into consumer AI tools. Everything is encrypted in transit and at rest. See how we protect patient data.

More questions? Browse help.medulla.ca.