Convert to ICD-10-CM: 
639.9 converts approximately to:
- 2015/16 ICD-10-CM O08.9 Unspecified complication following an ectopic and molar pregnancy
 ICD-9-CM Volume 2 Index entries containing back-references to 
639.9:
- Complications ectopic or molar pregnancy NEC 639.9 ectopic or molar pregnancy NEC 639.9