USCIS Policy Memo: Extension of Validity of Medical Certifications on Form I-693

"This Policy Memorandum (PM) temporarily extends the validity of civil surgeon endorsements on Form I-693 for adjustment of status and temporary residence applicants.  This PM updates the Adjudicator’s Field Manual (AFM) by revising Chapter 40.1(c), (AFM Update AD13-01)." - USCIS, Dec. 20, 2012.