Cessna T-240 pilot reported hypoxia symptoms and diverted to land.

Attributes
ACN	1632987
Time
Date	201904
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Cessna 400
Operating Under FAR Part	Part 91
Flight Phase	Descent
Route In Use	Visual Approach
Flight Plan	IFR
Person 1
Function	Pilot Flying Single Pilot
Qualification	Flight Crew Private
Experience	Flight Crew Last 90 Days 40 Flight Crew Total 3445 Flight Crew Type 300
Events
Anomaly	Aircraft Equipment Problem Critical Deviation - Procedural FAR Deviation - Procedural Published Material / Policy Flight Deck / Cabin / Aircraft Event Illness
Miss Distance	Horizontal 0 Vertical 0

Narrative:

During an IFR flight I experienced an in-flight emergency (suspected hypoxia) which required a pilot deviation to safely land the aircraft. Due to this in-flight emergency; my ability to communicate with ATC in any way was hindered and no communication was possible.

Original NASA ASRS Text

Title: Cessna T-240 pilot reported hypoxia symptoms and diverted to land.

Narrative: During an IFR flight I experienced an in-flight emergency (suspected hypoxia) which required a pilot deviation to safely land the aircraft. Due to this in-flight emergency; my ability to communicate with ATC in any way was hindered and no communication was possible.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.