Axel's mother, Linda Peanberg King, told St Pancras Coroner's Court that she and her husband Alistair made contact with the Harmoni centre in the Whittington Hospital in Archway, after their son fell ill on the night of October 30 last year.
Five days later - after consulting at least three doctors - he died from bronchopneumonia.
More top news
A bungling robber who left his phone at crime scene has been jailed for more than three years.
Four police officers set to face misconduct hearings after a Jury in the Henry Hicks inquest returned a narrative verdict.
A British passport spoof 'have to take safety precautions when leaving house' video has hit 650,000 views on Facebook.