# Why are there are both 9 and 10 month questionnaires for ASQ-3?

Mark E. Ting  
Dec 10, 2025

The 9 month questionnaire interval was added to the third edition of ASQ to assist with pediatricians' use of screening tools at the 9, 18, and 30 month visits per the [AAP policy statement on screening](https://publications.aap.org/pediatrics/article/118/1/405/69580/Identifying-Infants-and-Young-Children-With?autologincheck=redirected). There is an overlap between the age administration windows for the 9 and 10 month questionnaires, and your program may decide which questionnaire to use.

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[ASQ-3(195)](https://support.agesandstages.com/kb/tag/138) [age interval(12)](https://support.agesandstages.com/kb/tag/154) [9 month(4)](https://support.agesandstages.com/kb/tag/217) [10 month(2)](https://support.agesandstages.com/kb/tag/218) [pediatrician(3)](https://support.agesandstages.com/kb/tag/219)