S31.156A: Open bite of abdominal wall, right flank without penetration into peritoneal cavity, initial encounter

New code · FY2026

Billable: use this code on claims.

• New code, effective October 1, 2025 (FY2026).

Code breakdown

Coding notes

Inclusion terms (from S31.15)

• Bite of abdominal wall NOS

Excludes1 (from S31.15)

• superficial bite of abdominal wall (S30.871)

Inclusion terms (from S31.1)

• Open wound of abdominal wall NOS

Excludes2 (from S31.1)

• open wound of abdominal wall with penetration into peritoneal cavity (S31.6-)

Excludes1 (from S31)

• traumatic amputation of part of abdomen, lower back and pelvis (S38.2-, S38.3)

Excludes2 (from S31)

• open wound of hip (S71.00-S71.02)
• open fracture of pelvis (S32.1--S32.9 with 7th character B)

Code also (from S31)

• any associated:
• spinal cord injury (S24.0, S24.1-, S34.0-, S34.1-)
• wound infection

7th character (from S31)

• The appropriate 7th character is to be added to each code from category S31

7th characters (category S31)

• A initial encounter
• D subsequent encounter
• S sequela

Medicare coverage

S31.156A is listed as a covered diagnosis in 13 Medicare billing and coding articles:

• A52438 Billing and Coding: Tetanus Immunization
• A53057 Billing and Coding: Home Health Occupational Therapy
• A53058 Billing and Coding: Home Health Physical Therapy
• A53064 Billing and Coding: Outpatient Occupational Therapy
• A53065 Billing and Coding: Outpatient Physical Therapy
• A54767 Billing and Coding: Medicare Preventive Coverage for Certain Vaccines
• A55909 Billing and Coding: Wound Care
• A56421 Billing and Coding: CT of the Abdomen and Pelvis
• A56459 Billing and Coding: Debridement Services
• A56900 Billing and Coding: Immunizations

…and 3 more. Check the coverage tool for your CPT code.

Check this code

• Code search: full entry and nearby codes
• Excludes checker: can it be billed with another code?
• Coverage checker: is it covered for your CPT code?

All FY2026 ICD-10-CM changes

ICD-10-CM codes and descriptions are from the CMS and NCHS code files. Coverage is from the CMS Medicare Coverage Database billing and coding articles.