The CDC updated the recommended guidelines for employers (7/20/2020) to follow for accepting an employee back at the worksite after an isolation period for COVID-19 (whether their case is confirmed or suspected).

They did not seem to cover all the situations we are seeing, so here's some ideas for you:

Situation 1: Person had symptoms and is getting better (whether tested positive, or never tested)

Must have these:  Symptoms (such as cough or shortness of breath must be improved & no fever last 24 hrs (without taking any fever reducing meds).
And need one of these:
a) 10+ days since symptoms first occurred
b) 2 negative COVID-19 tests taken over 24 hrs apart (Because of lines and delays in results, this may not be a feasible route these days).

Situation 2: Person was hospitalized for COVID-19

Should have a Doctor's note and 2 negative COVID-19 tests taken over 24 hrs apart

Situation 3: Person tested Positive for COVID-19 but never had symptoms

Need one of these:
a) 10+ days since the positive test (collection date)
b) 2 negative COVID-19 tests taken over 24 hrs apart (Because of lines and delays in results, this may not be a feasible route these days)

Situation 4: Person Self-Quarantined because a family member had COVID-19 (but the employee never had symptoms)

a) 14+ days after the last day the worker was exposed to COVID-19 (weeks after each person in the household stopped having symptoms)
b) 2 negative COVID-19 tests taken over 24 hrs apart

Companies should request a doctor memo stating something like the following: This person meets the CDC guidelines for ending isolation and should be able to perform regular job duties without endangering themselves or co-workers.

If your company is dealing with one of the situations above, the company should study the updated CDC guidelines at this link and draft and communicate company policy on return to work (after COVID-19 isolation) with affected employees:

https://www.cdc.gov/coronavirus/2019-ncov/hcp/disposition-in-home-patients.html