S11.13XA vs S11.13XS

S11.13XA (Puncture wound without foreign body of thyroid gland, initial encounter) compared with S11.13XS (Puncture wound without foreign body of thyroid gland, sequela), from the official CMS tabular data. S11.13XA and S11.13XS code the same injury at a different phase of treatment. MedCoder-derived

Can these codes be reported together?

Review

Encounter relationship

S11.13XA

Initial encounter

Puncture wound without foreign body of thyroid gland, initial encounter

↔

S11.13XS

Sequela

Puncture wound without foreign body of thyroid gland, sequela

What we found

Same injury, other encounter phase.S11.13XA and S11.13XS code the same injury at a different phase of treatment, set by the 7th character.

The 7th character records the type of care given at the encounter being coded (ICD-10-CM Official Guidelines, Section I.C.19.a), so one encounter takes one of these, not both.

What to review

Use the 7th character that matches the encounter being coded (initial, subsequent or sequela); one encounter takes one of them.

Guide: 7th characters: initial, subsequent, sequela Check these on a claim

Why it matters

The 7th character records the phase of care for the encounter being coded, so a single encounter takes one of these characters, not several. Review whether both phases belong on the same episode of care.

Source / rule

ICD-10-CM Official Guidelines, Section I.C.19.a

Side by side

	S11.13XAPuncture wound without foreign body of thyroid gland, initial encounter	S11.13XSPuncture wound without foreign body of thyroid gland, sequela
Billing status	Billable	Billable
Classification	S00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88)	S00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88)
Definition	Puncture wound without foreign body of thyroid gland, initial encounter is a billable ICD-10-CM diagnosis code (S11.13XA).	Puncture wound without foreign body of thyroid gland, sequela is a billable ICD-10-CM diagnosis code (S11.13XS).
7th character	The appropriate 7th character is to be added to each code from category S11	The appropriate 7th character is to be added to each code from category S11
Includes	injuries of nape injuries of supraclavicular region injuries of throat	injuries of nape injuries of supraclavicular region injuries of throat
Excludes2	open fracture of vertebra (S12.- with 7th character B) burns and corrosions (T20-T32) effects of foreign body in esophagus (T18.1) effects of foreign body in larynx (T17.3) effects of foreign body in pharynx (T17.2) effects of foreign body in trachea (T17.4) frostbite (T33-T34) insect bite or sting, venomous (T63.4)	open fracture of vertebra (S12.- with 7th character B) burns and corrosions (T20-T32) effects of foreign body in esophagus (T18.1) effects of foreign body in larynx (T17.3) effects of foreign body in pharynx (T17.2) effects of foreign body in trachea (T17.4) frostbite (T33-T34) insect bite or sting, venomous (T63.4)
Code also	any associated: spinal cord injury (S14.0, S14.1-) wound infection	any associated: spinal cord injury (S14.0, S14.1-) wound infection

Notes are the code’s own tabular entry, quoted as published. A note that names the other code is the one the verdict above rests on.

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Derived from the official CMS ICD-10-CM tabular data (FY2026). A coding-rule comparison, not billing advice: payer-specific edits and medical-necessity policy are outside its scope. All data sources