U.S. Citizenship and Immigration Services (USCIS) recently announced that beginning April 28, 2017, civil surgeons must use the 02/07/17 edition of Form I-693 (which shows an expiration date of 02/28/2019 at the top right corner of page 1). USCIS will not accept any previous editions (with an expiration date of 03/31/2017 or earlier) that a civil surgeon signed and dated on or after April 28, 2017.
The updated form and instructions are at https://www.uscis.gov/i-693. A page listing updates to forms chronologically, along with a brief explanation of the update, is at https://www.uscis.gov/forms-updates.