ICD-10-CM Code for Suspected Intermittent Hernia
For a patient reporting an intermittent abdominal hernia that is not visualized on physical examination, use ICD-10-CM code R19.00 (Intra-abdominal and pelvic swelling, mass and lump, unspecified site) or the more specific code for suspected hernia based on location if known (e.g., K40.90 for unilateral inguinal hernia, unspecified, without obstruction or gangrene).
Clinical Context and Coding Strategy
When a patient reports seeing or feeling a hernia intermittently but it cannot be confirmed on examination, you face a common diagnostic challenge. The hernia may be reducible or only present with increased intra-abdominal pressure (Valsalva, standing, coughing), making it invisible during a standard supine examination 1.
Recommended Coding Approach:
Primary option: Use the symptom-based code R19.00 (Intra-abdominal and pelvic swelling, mass and lump, unspecified site) when the hernia cannot be confirmed on exam. This accurately reflects the clinical scenario—the patient reports a mass/bulge, but you cannot document it.
Alternative option: If you have strong clinical suspicion based on history and want to code for the suspected hernia location, use the appropriate hernia code without complication (e.g., K40.90 for inguinal, K42.9 for umbilical, K43.9 for ventral/incisional). Insurance may accept this for imaging authorization given the clinical history.
Justification for Imaging
The evidence supports that intermittent hernias can be missed on physical examination 1. Ultrasound is appropriate for initial evaluation, though CT scan has higher sensitivity for detecting hernias that are not clinically apparent. Document in your order:
- Patient reports intermittent visible bulge
- Not visualized on current examination
- Concern for reducible/intermittent hernia
- Need imaging to confirm or exclude hernia
Important Caveats
Insurance authorization: Some payers may require a confirmed hernia diagnosis code rather than a symptom code. If R19.00 is rejected for authorization, resubmit with the anatomically appropriate hernia code based on where the patient reports seeing the bulge.
Documentation is critical: Clearly document the patient's description of the intermittent bulge, activities that provoke it, and your negative examination findings. This supports medical necessity regardless of which code you use.
Consider dynamic ultrasound: Request ultrasound with Valsalva maneuver or standing views, as standard supine imaging may also miss an intermittent hernia just as your examination did.
The discordance between patient-reported symptoms and physical examination findings is well-recognized in hernia evaluation 2, making imaging medically necessary even without a palpable defect on your current exam.