Pilot reported a near midair collision with another aircraft while under ATC flight following.

Attributes
ACN	1752400
Time
Date	202007
Local Time Of Day	0001-0600
Place
Locale Reference	ZZZ.TRACON
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Skylane 182/RG Turbo Skylane/RG
Operating Under FAR Part	Part 91
Flight Phase	Descent
Route In Use	Visual Approach
Flight Plan	None
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	Cruise
Person 1
Function	Captain Pilot Flying Single Pilot
Qualification	Flight Crew Commercial Flight Crew Instrument Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 250 Flight Crew Total 1040 Flight Crew Type 200
Events
Anomaly	ATC Issue All Types Conflict NMAC Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy Deviation - Track / Heading All Types
Miss Distance	Horizontal 0 Vertical 100

Narrative:

After releasing skydivers over ZZZ1 airport I began a descending left turn. While passing through ~4;000 ft. MSL ZZZ ATC advised traffic less than 1 mile south; northbound altitude indicating 2;700 ft. And advised an immediate turn to the east 090. At the time I received the traffic advisory I was already on a heading of 090 and could not see the traffic. I stopped my descent and leveled off at 3;000 ft. MSL and saw the other aircraft pass directly below me at an estimated 100 feet. On the next flight I confirmed with the controller that I heard correctly to turn left; rather than west; and she confirmed the instruction of left to 090. I did not receive an instruction to stop my descent.

Original NASA ASRS Text

Title: Pilot reported a NMAC with another aircraft while under ATC flight following.

Narrative: After releasing skydivers over ZZZ1 airport I began a descending left turn. While passing through ~4;000 ft. MSL ZZZ ATC advised traffic less than 1 mile south; northbound altitude indicating 2;700 ft. and advised an immediate turn to the east 090. At the time I received the traffic advisory I was already on a heading of 090 and could not see the traffic. I stopped my descent and leveled off at 3;000 ft. MSL and saw the other aircraft pass directly below me at an estimated 100 feet. On the next flight I confirmed with the controller that I heard correctly to turn left; rather than west; and she confirmed the instruction of left to 090. I did not receive an instruction to stop my descent.

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.