Hi Guest!

D7921 – collection and application of autologous blood concentrate product
can be crosscoded to:
0232T - Injection(s), platelet rich plasma, any site, including image guidance, harvesting and preparation when performed
P9020 - Platelet rich plasma, each unit

D7560 - maxillary sinusotomy for removal of tooth fragment or foreign body
can be crosscoded to:
31020 - Sinusotomy, maxillary (antrotomy); intranasal
31030 - Sinusotomy, maxillary (antrotomy); radical (Caldwell-Luc) without removal of antrochoanal polyps


D7261 - primary closure of a sinus perforation
Can be crosscoded to:
30580 - repair fistula; oromaxillary
or
31299 - sinus surgery procedure, unlisted


D7530 - removal of foreign body from mucosa, skin, or subcutaneous alveolar tissue
can be crosscoded to one of the following:
41805 - removal of embedded foreign body, soft tissues
30300 - Removal foreign body, intranasal; office type procedure
30310 - Removal foreign body, intranasal; requiring general anesthesia


D9613 - infiltration of sustained release therapeutic drug, per quadrant
depending on the drug, can be crosscoded to:
C9290 - Injection, bupivacaine liposome, 1 mg


As for the diagnosis code for foreign body in sinus, here are some coding options for you:

T17.0XXA - Foreign body in nasal sinus, initial encounter
T17.0XXD - Foreign body in nasal sinus, subsequent encounter
T17.0XXS - Foreign body in nasal sinus, sequela


Hope this helps!