As a result, the rating agency maintains its stable outlook on the sector.
Among the diverse group of pharmaceutical companies rated by Moody's, those focusing on cancer and other complex diseases will see higher earnings growth.
Meanwhile, earnings growth will be more limited for companies with greater exposure to the strong US dollar and those with upcoming patent expirations of blockbuster drugs.
"Absent a systemic change such as legislation to lower drug prices, we do not expect the US pricing environment to substantially erode," Moody's Senior Vice President Michael Levesque said.
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"Some categories including respiratory and diabetes face pricing pressure, but most other categories, including those involving specialty diseases, will sustain US price increases," Levesque added.
Biosimilars will become a growing threat to branded pharmaceutical companies, but the revenue cliff for biotech products is relatively low.
Moody's believes that industry consolidation will continue as large branded pharmaceutical companies acquire companies with attractive pipeline products or newly launched drugs, and as generic companies seek greater scale.