With few exceptions, if you buy back prior service, you will have to undergo a medical examination.
If you buy back service within one year from the date of issuance of your written Notification of Plan Membership (PWGSC-TPSGC 2018) under the pension plan (also known as a "normal" election) and you fall into one of the following categories, you will not need to undergo a medical examination:
For all other "normal" elections, a medical must be undergone to validate your election. Should you undergo but fail the examination, neither you nor your survivors would be entitled to pension benefits in respect of the service buyback unless you remain employed in the Federal Public Service for five years from the date of the failed examination. If you do not remain employed in the Federal Public Service for five years, then the payments for the elective service will be refunded. Interest is only payable on the contributions that have been in the fund for at least two years. However, if you undergo and pass a subsequent medical examination within this five-year period and are still employed, then the buyback will be validated.
The following are circumstances under which you must pass a medical examination:
If you do not pass the medical examination, the service cannot be counted.
You must undergo the examination not more than 90 days before or six months after the date of signing the election form. You should therefore contact your physician as soon as possible and advise the if you experience difficulty in obtaining an appointment within this timeframe. The medical examination is undergone at your own expense. Government of Canada Pension Centre
The following forms, which your physician must fill out, sign and forward, are required for your medical examination and will be provided by the Pension Centre: