quarter of 2022 also included $3.7 million, or ($0.02) per share, of lease abandonment costs related to the abandonment of certain excess leased office space.
Results for the third quarter of 2021 included stock-based compensation expense of $71.7 million, or ($0.45) per share, and amortization of acquired intangibles of $45.1 million, or ($0.28) per share.
Adjusted EBITDA* decreased 24% to $51.2 million, compared to $67.4 million for the third quarter of 2021.
GAAP gross margin, which includes depreciation and amortization, was 68.3 percent for the third quarter of 2022, compared to 67.1 percent for the third quarter of 2021.
Adjusted gross margin* was 69.6 percent for the third quarter of 2022, compared to 67.6 percent for the third quarter of 2021.
Average revenue per U.S. paid member increased to $2.61 in the third quarter of 2022, from $2.40 in the third quarter of 2021.
Nine Months Ended September 30, 2022
Revenue increased 20% to $1,769.1 million from $1,478.5 million in the first nine months of 2021. Access fees revenue grew 23% to $1,550.1 million, and visit fee revenue grew 8% to $200.2 million for the first nine months of 2022. U.S. Revenues grew 20% to $1,546.6 million, and International revenues grew 19% to $222.5 million for the first nine months of 2022.
Non-cash goodwill impairment charges of $9.6 billion were recorded in the first nine months of 2022. The non-cash charges had no impact on the provision for income taxes.
Net loss totaled $9,849.5 million, or ($61.09) per share, for the first nine months of 2022, compared to $417.8 million, or ($2.68) per share, for the first nine months of 2021. Results for the first nine months of 2022 primarily included non-cash goodwill impairment charges of $9,630.0 million, or ($59.73) per share, as well as stock-based compensation expense of $167.1 million, or ($1.04) per share, and amortization of acquired intangibles of $147.3 million, or ($0.91) per share. Net loss for the first nine months of 2022 also included $3.7 million, or ($0.02) per share, of lease abandonment costs related to the abandonment of certain excess leased office space.
Results for the first nine months of 2021 included stock-based compensation expense of $241.0 million, or ($1.55) per share, amortization of acquired intangibles of $133.8 million, or ($0.86) per share, loss on extinguishment of debt of $43.7 million, or ($0.28) per share, and non-cash income taxes charges of $93.9 million, or ($0.60) per share.
Adjusted EBITDA* decreased 20% to $152.4 million compared to $190.8 million for the first nine months of 2021.
GAAP gross margin, which includes depreciation and amortization, was 67.5 percent for the first nine months of 2022, compared to 67.3 percent for the first nine months of 2021.
Adjusted gross margin* was 68.6 percent for the first nine months of 2022 compared to 67.9 percent for the first nine months of 2021.
Average revenue per U.S. paid member increased to $2.58 in the first nine months of 2022, from $2.27 in the first nine months of 2021.