15.3 Respiratory System Surgery
Key Takeaways
- Diagnostic endoscopy is a CPT separate procedure and is bundled into surgical endoscopy of the same region in the same session (31231 into FESS; 31622 into surgical bronchoscopy; diagnostic laryngoscopy into a more extensive laryngeal endoscopy).
- Nasal/sinus surgical endoscopy (31253–31288 families, plus balloon 31295–31298) is selected by sinus, laterality, and whether tissue is removed; combination codes already include listed sinuses on that side.
- Bronchoscopy with biopsy, brushing, lavage, or transbronchial sampling uses 31623–31628 and related families; do not add diagnostic 31622 when those surgical or sampling codes are reported.
- Thoracentesis is 32554 without imaging and 32555 with imaging; chest-tube and indwelling pleural-drainage families (32551, 32556, 32557) require documented catheter or tube work, not a simple needle tap.
- NCCI bundles approach from the same naris, airway, or incision; paired sinuses need laterality, but a combination FESS code is not unbundled into every historic component.
15.3 Respiratory System Surgery
Quick Answer: For outpatient respiratory surgery, code the most extensive endoscopy actually performed in that region and session. Diagnostic nasal endoscopy (31231), diagnostic laryngoscopy, and diagnostic bronchoscopy (31622) are CPT separate procedures. When the same session includes surgical sinus work (functional endoscopic sinus surgery, FESS), operative laryngoscopy, or bronchoscopy with biopsy or other intervention, the diagnostic look is bundled. Thoracentesis is 32554 (no imaging) or 32555 (with imaging). A chest tube or indwelling pleural catheter is a different family (32551, 32556, 32557, tunneled 32550)—not a thoracentesis with a longer needle.
This independent OpenExamPrep section helps learners study respiratory facility coding for the AAPC COC exam. It is not an AAPC or CMS product and does not claim partnership or official review by those organizations.
Why respiratory items cluster on endoscopy bundling
ASC and HOPD respiratory volume is sinus endoscopy, laryngoscopy, bronchoscopy, and pleural drainage—not pneumonectomy. The COC surgery domain still expects you to read an SDS op note and decide whether the surgeon performed a diagnostic endoscopy that stands alone or a surgical endoscopy that swallows the diagnostic code. That is the same NCCI idea as diagnostic arthroscopy in section 15.2, applied to the airway and sinuses. Approach through the same naris, the same tracheobronchial tree, or the same chest incision is included in the more extensive procedure. Modifier 59 or XS is for a distinct structure or session (for example, a truly separate laterality or a discontinued diagnostic look on a different day), not for "we always bill 31231 with FESS."
Some airway reconstructions remain IPO (status indicator C). MM14361 even removed certain pulmonary codes from a disposable-endoscope pairing because those procedures stay inpatient-only. Do not analogize from the MSK IPO removals and assume every thoracic code is now an ASC case.
Nasal endoscopy and FESS
31231 is diagnostic nasal endoscopy, a separate procedure. It is the correct code when the surgeon inspects the nasal cavity and meatuses with an endoscope and does not proceed to surgical sinus work. It is not reported with surgical endoscopic sinus codes in the same session on the same side. Surgical families include:
- 31237 and related codes for endoscopic biopsy, polypectomy, or debridement when that is the surgical act
- 31240 concha bullosa resection
- 31253–31259 combination endoscopic sinus codes that already package listed combinations (for example, ethmoid work plus frontal or sphenoid on that side)
- 31254–31255 anterior versus total ethmoidectomy when a combination code is not the better fit
- 31256–31267 maxillary antrostomy, with or without tissue removal from the maxillary sinus
- 31276 frontal sinus exploration
- 31287–31288 sphenoidotomy, with or without tissue removal
- 31295–31298 balloon dilation families when balloon ostial dilation is what was performed
Read the op note for which sinuses, left versus right, and whether tissue was removed. A combination code that already includes total ethmoidectomy plus sphenoid work on the right is not unbundled into historic component codes plus 31231. Bilateral FESS needs laterality: many payers want RT and LT on separate lines rather than a single 50, especially when the sinus mix differs by side. Do not report a left-only maxillary antrostomy as bilateral because the surgeon "looked" at the right side diagnostically—the diagnostic look on the contralateral side still follows separate-procedure logic and NCCI, and a documented diagnostic endoscopy of the opposite naris is a distinct structure discussion, not automatic 31231 plus surgical codes on the operated side without a book and edit check.
Turbinate procedures and septoplasty live in nearby CPT ranges. If they are performed through the same session, apply NCCI: some turbinate work is separately reportable; some approach work is not. The exam item will give you the documented procedures—code what was done, then ask whether any listed code is a separate procedure used only as the approach.
Laryngoscopy
Laryngoscopy families distinguish indirect (31505 and related) from direct, and they distinguish diagnostic inspection from operative work with biopsy, excision, or use of an operating microscope or telescope (31525, 31535, 31536, 31540–31546, flexible 31575–31579). If the diagnostic laryngoscopy is the approach to a biopsy or tumor excision in the same session, report the surgical laryngoscopy family, not diagnostic plus surgical. Facility coding still needs the approach (flexible versus rigid, with versus without operating microscope) because those are different codes—not because the facility reports a professional global period.
Bronchoscopy with and without biopsy
31622 is diagnostic bronchoscopy, including fluoroscopic guidance when performed, and it is a separate procedure. Surgical or sampling bronchoscopies in the 31623–31628 range (brushing, bronchoalveolar lavage, endobronchial biopsy, transbronchial lung biopsy) include the diagnostic inspection. Report 31622 only when no more extensive bronchoscopy is done. Transbronchial biopsy is further split by lobe rules and add-on codes in the current book; endobronchial ultrasound (EBUS) families 31652–31654 are additional when EBUS sampling is documented. Do not add 31622 to 31625 because the note says "the tracheobronchial tree was examined, then biopsies were taken." That examination is the approach.
If the case uses a disposable bronchoscope, any separately reportable device HCPCS follows OPPS device edits for that year; MM14361 reminds hospitals that some IPO pulmonary procedures are not paired with single-use endoscope C-codes because they remain inpatient-only. The procedure code still has to be a payable outpatient code before device pairing matters.
Thoracentesis versus chest tube
Pleural fluid removal without leaving a drain is thoracentesis: 32554 without imaging guidance, 32555 with imaging guidance (ultrasound or fluoroscopy). Do not add a separate radiology ultrasound code for the same guidance when 32555 is used. If the surgeon places a percutaneous pleural drain with imaging, use 32556 (without indwelling catheter) or 32557 (with indwelling catheter), not 32555 plus a supply line that pretends to be a tube. 32551 is tube thoracostomy (open or cut-down chest tube). Tunneled indwelling pleural catheters use 32550. Removal of a tunneled catheter is a different code (32552). The mini-op-note words that change the family are needle versus catheter versus tube, indwelling or not, and imaging used or not.
| Documented pleural work | Family | Do not also report |
|---|---|---|
| Needle thoracentesis, no imaging | 32554 | 32555 |
| Thoracentesis with ultrasound | 32555 | 32554 plus a separate US guidance code for the same guidance |
| Percutaneous drain, imaging, not indwelling | 32556 | Thoracentesis 32555 for the same insertion |
| Percutaneous drain, imaging, indwelling catheter | 32557 | 32551 unless a true tube thoracostomy was also a distinct procedure |
| Surgical tube thoracostomy | 32551 | A thoracentesis code for the same tube |
NCCI: separate procedure and same approach
For respiratory endoscopy, memorize one sentence: diagnostic endoscopy is included in surgical endoscopy of the same anatomic region in the same session. The diagnostic code's "separate procedure" status is a warning label, not a second bill. The same-incision (or same-airway) rule bundles the approach, dilation needed to pass the scope when integral, and routine fluoroscopy when the bronchoscopy code already includes it. Distinct laterality, a different organ system, or a different session is the only clean path to two endoscopy codes.
Mini-op-note (hospital SDS / ASC)
Pre-op: chronic rhinosinusitis, left. Procedure: left nasal endoscopy; uncinectomy; left maxillary antrostomy with removal of polypoid tissue from the maxillary sinus; left total ethmoidectomy; sphenoid and frontal sinuses not entered; no septoplasty. Started with a diagnostic look, then proceeded to surgical dissection. Facility coding: surgical endoscopic families for left total ethmoidectomy plus left maxillary antrostomy with tissue removal (31255-type and 31267-type families, or a combination code if the current book lists one that exactly matches). Do not add 31231. Append LT. Do not add right-sided FESS codes for a contralateral glance that was not surgical.
A second SDS example: outpatient bronchoscopy for a right-upper-lobe lesion. The tracheobronchial tree is inspected; endobronchial biopsies are taken; no EBUS. Report the bronchoscopy-with-biopsy family (31625), not 31622 plus 31625. If ultrasound-guided thoracentesis of a left effusion is performed in the same encounter through a separate chest-wall stick, that is a distinct anatomic site (pleura versus airway) and may be separately reportable after an NCCI check—32555, not 32554 plus a radiology ultrasound line.
Same-session left FESS includes a diagnostic nasal endoscopy, then left total ethmoidectomy and left maxillary antrostomy with tissue removal. Which reporting is correct?
An HOPD note documents needle thoracentesis of a right pleural effusion using ultrasound guidance. No catheter is left in place. Which coding path is correct?
When is diagnostic nasal endoscopy 31231 reportable on a facility outpatient claim?