SA Modifier: A supervising physician should use this modifier when billing on behalf of a PA, ANP, of CRNFA for non-surgical services. (Modifier SA is used when the PA, ANP, or CRNFA is assisting with any other procedure that DOES NOT include surgery.) Yes, you need to add the modifier SA to all NP services only (excludes PA services) which are submitted under the physician provider number. - See more at:
https://www.supercoder.com/my-ask-a...for-incident-to-services#sthash.CrxV7XTy.dpuf
Supervision of Physician Assistant, Advanced Nurse Practitioner or
Certified Registered Nurse First Assistant
The following modifiers should be used by the supervising physician when he/she is
billing for services rendered by a Physician Assistant, (PA), Advanced Nurse Practitioner
(APN) or Certified Registered Nurse First Assistant (CRNFA):
AS Modifier: A physician should use this modifier when billing on behalf of a PA, ANP
or CRNFA for services provided when the aforementioned providers are acting as an
assistant during surgery. (Modifier AS to be used ONLY if they assist at surgery)
SA Modifier: A supervising physician should use this modifier when billing on behalf of
a PA, ANP, of CRNFA for non-surgical services. (Modifier SA is used when the PA,
ANP, or CRNFA is assisting with any other procedure that DOES NOT include surgery.)
Hope this helps