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ICD-10-CM 2027

ICD-10 code for flank puncture

S31.13A

Puncture wound of abdominal wall without foreign body, unspecified flank without penetration into peritoneal cavity

Header — needs a more specific code

From the official ICD-10-CM alphabetic index entry “Puncture › flank”. Page updated September 29, 2026.

About coding flank puncture

The ICD-10-CM code for flank puncture is S31.13A (Puncture wound of abdominal wall without foreign body, unspecified flank without penetration into peritoneal cavity). The official index lists 11 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on S31.13A.

Within S31.13, choose S31.13A (unspecified flank without penetration into peritoneal cavity) only when documentation doesn't support a more specific option: right upper quadrant without penetration into peritoneal cavity (S31.130), left upper quadrant without penetration into peritoneal cavity (S31.131), epigastric region without penetration into peritoneal cavity (S31.132), right lower quadrant without penetration into peritoneal cavity (S31.133), left lower quadrant without penetration into peritoneal cavity (S31.134), periumbilic region without penetration into peritoneal cavity (S31.135), right flank without penetration into peritoneal cavity (S31.136), left flank without penetration into peritoneal cavity (S31.137) and 1 more.

Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.

It was added in FY2026, effective October 1, 2025.

More specific flank puncture codes (official index)

  • with
  • foreign body S31.14A — Puncture wound of abdominal wall with foreign body, unspecified flank without penetration into peritoneal cavity
  • penetration into peritoneal cavity S31.63A — Puncture wound of abdominal wall without foreign body, unspecified flank with penetration into peritoneal cavity
  • with foreign body S31.64A — Puncture wound of abdominal wall with foreign body, unspecified flank with penetration into peritoneal cavity
  • left S31.137 — Puncture wound of abdominal wall without foreign body, left flank without penetration into peritoneal cavity
  • with
  • foreign body S31.147 — Puncture wound of abdominal wall with foreign body, left flank without penetration into peritoneal cavity
  • penetration into peritoneal cavity S31.637 — Puncture wound of abdominal wall without foreign body, left flank with penetration into peritoneal cavity
  • with foreign body S31.647 — Puncture wound of abdominal wall with foreign body, left flank with penetration into peritoneal cavity
  • right S31.136 — Puncture wound of abdominal wall without foreign body, right flank without penetration into peritoneal cavity
  • with
  • foreign body S31.146 — Puncture wound of abdominal wall with foreign body, right flank without penetration into peritoneal cavity
  • penetration into peritoneal cavity S31.636 — Puncture wound of abdominal wall without foreign body, right flank with penetration into peritoneal cavity
  • with foreign body S31.646 — Puncture wound of abdominal wall with foreign body, right flank with penetration into peritoneal cavity

Common questions about flank puncture ICD-10 codes

What is the ICD-10 code for flank puncture?

S31.13A — Puncture wound of abdominal wall without foreign body, unspecified flank without penetration into peritoneal cavity (a header code; report a more specific subcode). More specific codes apply when the documentation supports them: S31.14A, S31.63A, S31.64A, S31.137 and others below.

What is the ICD-10 code for left flank puncture?

S31.137 — Puncture wound of abdominal wall without foreign body, left flank without penetration into peritoneal cavity (header code; choose a more specific subcode).

What is the ICD-10 code for right flank puncture?

S31.136 — Puncture wound of abdominal wall without foreign body, right flank without penetration into peritoneal cavity (header code; choose a more specific subcode).

Is S31.13A billable?

No. S31.13A is a header code. Report one of its more specific subcodes instead.