B737 captain reported missing hazmat documents discrepancy during preflight.

Attributes
ACN	1553524
Time
Date	201806
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Aircraft 1
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Flight Plan	IFR
Person 1
Function	Pilot Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine Flight Crew Instrument
Events
Anomaly	Deviation - Procedural Hazardous Material Violation Deviation - Procedural Published Material / Policy

Narrative:

After takeoff I discovered a discrepancy on our load closeout data. There were no restricted articles listed in the aft cargo compartment on the closeout when in fact we had a notoc provided by ground crew in ZZZ of dry ice loaded. We overlooked this difference on taxi out. Factors that were a distraction are: maintenance write up at departure time; ramp closure due to lightning at boarding time; weather; ground crew abandonment without notice to cockpit after check in at departure time prior to push clearance; awaiting new ground crew after push clearance received; [and] MEL items and coordination with flight attendants. [Suggest] a more thorough closeout briefing during taxi out with line item verbal review.

Original NASA ASRS Text

Title: B737 Captain reported missing HAZMAT documents discrepancy during preflight.

Narrative: After takeoff I discovered a discrepancy on our load closeout data. There were no restricted articles listed in the AFT cargo compartment on the closeout when in fact we had a NOTOC provided by ground crew in ZZZ of dry ice loaded. We overlooked this difference on taxi out. Factors that were a distraction are: maintenance write up at departure time; ramp closure due to lightning at boarding time; weather; ground crew abandonment without notice to cockpit after check in at departure time prior to push clearance; awaiting new ground crew after push clearance received; [and] MEL items and coordination with flight attendants. [Suggest] a more thorough closeout briefing during taxi out with line item verbal review.

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.