Date: 202101
Local time of day: 1801-2400
Location: ZZZ.ARTCC, US
Flight conditions: VMC
Aircraft: Commercial Fixed Wing
Operator: Air Carrier
Operating under: Part 121
Flight plan: IFR
Mission: Passenger
Flight phase: Cruise
Airspace: Class A ZZZ
ATC / advisory: Center ZZZ
Reporter organization: Air Carrier
Reporter function: Captain; Pilot Flying
Reporter qualification: Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument
Human factors: Situational Awareness; Workload; Communication Breakdown; Physiological - Other
Anomaly: Flight Deck / Cabin / Aircraft Event Illness / Injury
Detector: Person Flight Attendant; Person Flight Crew
When detected: In-flight
Result: General None Reported / Taken
Contributing factors: Human Factors; Environment - Non Weather Related
Primary problem: Environment - Non Weather Related

Narrative: I did not declare an emergency with ATC. We were already near Top of Descent with no traffic ahead. Getting medical attention was not time critical. The greatest risk was in the deplaning of our other passengers.While enroute to ZZZ; I was notified that 'A man in [seat] XX1 had declared that he had a high fever prior to boarding; and that he now felt very ill.' I queued an ACARS to Dispatch 'call me med' and waited for more information. Once I got this additional information and spelling of the man's name; I sent the message and spoke with Medical and Dispatch in attendance. In the meantime; I got another call indicating the man now said that he just had high blood pressure and would be okay. The load was light and we agreed to move the man to the back row and to move other passengers forward. The Flight Attendant's temperature strip was inconclusive. This information was passed to Medical. We issued the man an N-95 mask; and he wore it. The advice from Medical was to provide Tylenol and continue to ZZZ. Paramedics would meet us at the gate.IMPORTANT; it was then that FA called back to say there was an identity mistake. The actual seat assignment was XX6; not XX1. This meant that the passenger's name was incorrect during the Dispatch/Medical call. The incorrect passenger name is omitted to avoid confusion. I sent the correct name to Dispatch via ACARS.On approach to ZZZ; the man aspirated on the carpet and floor next to the last row and could not wear a mask. FA's notified me of this on taxi-in.Because of the concern for COVID-19; we made the decision that we would have passengers deplane quickly; then allow either the paramedics to the passenger; or allow the man to deplane. Inflight Supervisor and Customer Service Supervisor were at gate and aware of the de-boarding plan. The paramedic overruled the plan and rushed aboard. He proceeded to escort the man passed all the economy passengers and then blocked the jet-way several moments to get him into a wheelchair. I ordered the First Class cabin to deplane after the paramedic passed on his way to the back. I'm glad I did.The aircraft was towed away for disinfection. I checked in with Flight Ops enroute prior to landing and told a call would not be required. Checked in with Chief Pilot on the day after to determine COVID-19 result. There was no answer as of this writing.




Synopsis: Air Carrier Captain reported a passenger became ill during the flight and the crew was concerned it could be COVID-19.