It was likely a big “O” — not an “Oh, no!”  

Naysayers who blamed a “medical emergency” for a woman’s loud, spontaneous orgasm at the LA Philharmonic concert are singing the wrong tune, according to officials.

There were no health emergency calls about a woman in the area of the performance at Walt Disney Concert Hall after the show’s 8 p.m. starting time Friday, Los Angeles Fire Department spokesman Nicholas Prange told The Post Thursday.

The department handles all reports of medical emergencies in the city and would have been contacted if the lady in question was having one, he said.

The only possible health crisis nearby centered on a 24-year-old male suffering from abdominal pain in a parking lot across the from the concert venue at 9:22 p.m., according to Prange, who said there was no indication he attended the show.

Over the weekend, a female concert-goer apparently had a noisy “full body orgasm” during LA Phil’s performance of Tchaikovsky’s 5th Symphony — though the band continued play without missing a beat, witnesses told the LA Times.

But other people at the performance claimed her caught-on-tape outburst sounded less like a steamy climax than a cry for help.

“I was there …The poor woman had a breakdown of some sort,” tweeted composer Rodrigo Ruiz. “We were all worried it was a medical emergency.”

“The [LA] times got it wrong it seems,” another observer wrote, as speculation swirled online.

But if the mystery woman was in fact screaming in pain or had a mental health crisis, the city’s EMS services never heard a thing about it, Prange said.

Told about reports that she may have simply been crying out in ecstasy, Prange replied, “Good for her.”

The LA Phil and Ruiz didn’t return The Post’s request for comment Thursday.