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S01.21XA ICD-10-CM Code: Laceration without foreign body of nose, initial encounter

Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.

Inpatient Payment Groups (MS-DRG)

MS-DRGs this diagnosis helps define, as principal or secondary, per the CMS ICD-10-CM/PCS MS-DRG Definitions Manual v43.0, Appendix B.

  • MS-DRG 011 — TRACHEOSTOMY FOR FACE, MOUTH AND NECK DIAGNOSES OR LARYNGECTOMY WITH MCC (MDC PRE)
  • MS-DRG 012 — TRACHEOSTOMY FOR FACE, MOUTH AND NECK DIAGNOSES OR LARYNGECTOMY WITH CC (MDC PRE)
  • MS-DRG 013 — TRACHEOSTOMY FOR FACE, MOUTH AND NECK DIAGNOSES OR LARYNGECTOMY WITHOUT CC/MCC (MDC PRE)
  • MS-DRG 154 — OTHER EAR, NOSE, MOUTH AND THROAT DIAGNOSES WITH MCC (MDC 03)
  • MS-DRG 155 — OTHER EAR, NOSE, MOUTH AND THROAT DIAGNOSES WITH CC (MDC 03)
  • MS-DRG 156 — OTHER EAR, NOSE, MOUTH AND THROAT DIAGNOSES WITHOUT CC/MCC (MDC 03)
  • MS-DRG 963 — OTHER MULTIPLE SIGNIFICANT TRAUMA WITH MCC (MDC 24)
  • MS-DRG 964 — OTHER MULTIPLE SIGNIFICANT TRAUMA WITH CC (MDC 24)
  • MS-DRG 965 — OTHER MULTIPLE SIGNIFICANT TRAUMA WITHOUT CC/MCC (MDC 24)

A diagnosis appearing in a group's logic does not by itself determine the DRG assigned to a stay; the grouper uses the full claim.

Official Registry Overview & Definition

Laceration without foreign body of nose, initial encounter is a billable ICD-10-CM diagnosis code (S01.21A).

Official Tabular Instructional Notes

Sequencing, inclusion, and exclusion notes published for S01.21XA in the official ICD-10-CM tabular list.

Includes

Conditions the official ICD-10-CM tabular list includes under this code.

  • injuries of ear
  • injuries of eye
  • injuries of face [any part]
  • injuries of gum
  • injuries of jaw
  • injuries of oral cavity
  • injuries of palate
  • injuries of periocular area
  • injuries of scalp
  • injuries of temporomandibular joint area
  • injuries of tongue
  • injuries of tooth

Excludes1 — Not Coded Here

Conditions generally not reported together with this code (Excludes1) -- an error unless the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).

Excludes2 — Not Included Here

Conditions not covered by this code, but which may be reported alongside it when both are present.

Code Also

Additional codes that may be required to fully describe the encounter.

  • any associated:
  • injury of cranial nerve (S04.-)
  • injury of muscle and tendon of head (S09.1-)
  • intracranial injury (S06.-)
  • wound infection
  • for any associated infection

Frequently Compared Codes

The official Excludes notes on S01.21XA name these codes. Each comparison page covers when the two can — or must not — be reported together.

Change history

No changes recorded for this code — unchanged since the FY2016 baseline of the change ledger.

Verify Before Coding

  • No Medicare Code Editor or MS-DRG Definitions Manual restrictions apply to this code.

From the code registry, the Medicare Code Editor, and the MS-DRG Definitions Manual. Check it against a full claim.

Contextual Map

Every relationship of S01.21XA in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.

Hierarchy

  • S00-T88 — Chapter 19: Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88) (S00-T88) [Hierarchy]
  • S00-S09 — Injuries to the head [Hierarchy]

Referenced by Excludes1 notes

  • S00 — Superficial injury of head [Excludes1](via S01.-): “open wound of head (S01.-)” · check together

Referenced by Code Also instructions

  • S04 — Injury of cranial nerve [Code Also](via S01.-): “open wound of head (S01.-)” · check together
  • S06 — Intracranial injury [Code Also](via S01.-): “open wound of head (S01.-)” · check together
  • S09.1 — Injury of muscle and tendon of head [Code Also](via S01.-): “any associated open wound (S01.-)” · check together

Clinical classification (CCSR)

  • INJ011 — Open wounds of head and neck, initial encounter [CCSR]

Potential MS-DRG (9)

  • DRG 011 — TRACHEOSTOMY FOR FACE, MOUTH AND NECK DIAGNOSES OR LARYNGECTOMY WITH MCC [MS-DRG]: “TRACHEOSTOMY FOR FACE, MOUTH AND NECK DIAGNOSES OR LARYNGECTOMY WITH MCC (MDC PRE)”
  • DRG 012 — TRACHEOSTOMY FOR FACE, MOUTH AND NECK DIAGNOSES OR LARYNGECTOMY WITH CC [MS-DRG]: “TRACHEOSTOMY FOR FACE, MOUTH AND NECK DIAGNOSES OR LARYNGECTOMY WITH CC (MDC PRE)”
  • DRG 013 — TRACHEOSTOMY FOR FACE, MOUTH AND NECK DIAGNOSES OR LARYNGECTOMY WITHOUT CC/MCC [MS-DRG]: “TRACHEOSTOMY FOR FACE, MOUTH AND NECK DIAGNOSES OR LARYNGECTOMY WITHOUT CC/MCC (MDC PRE)”
  • DRG 154 — OTHER EAR, NOSE, MOUTH AND THROAT DIAGNOSES WITH MCC [MS-DRG]: “OTHER EAR, NOSE, MOUTH AND THROAT DIAGNOSES WITH MCC (MDC 03)”
  • DRG 155 — OTHER EAR, NOSE, MOUTH AND THROAT DIAGNOSES WITH CC [MS-DRG]: “OTHER EAR, NOSE, MOUTH AND THROAT DIAGNOSES WITH CC (MDC 03)”
  • DRG 156 — OTHER EAR, NOSE, MOUTH AND THROAT DIAGNOSES WITHOUT CC/MCC [MS-DRG]: “OTHER EAR, NOSE, MOUTH AND THROAT DIAGNOSES WITHOUT CC/MCC (MDC 03)”
  • DRG 963 — OTHER MULTIPLE SIGNIFICANT TRAUMA WITH MCC [MS-DRG]: “OTHER MULTIPLE SIGNIFICANT TRAUMA WITH MCC (MDC 24)”
  • DRG 964 — OTHER MULTIPLE SIGNIFICANT TRAUMA WITH CC [MS-DRG]: “OTHER MULTIPLE SIGNIFICANT TRAUMA WITH CC (MDC 24)”
  • and 1 more

MDC crossing · procedures (28257)

  • Pre-MDC[MDC crossing]: “Pre-MDC — the grouper's crossing between diagnoses and procedures: a principal diagnosis sets the MDC, and same-MDC procedures move the stay to its surgical DRGs.”
  • MDC 03 — Diseases and Disorders of the Ear, Nose, Mouth and Throat [MDC crossing]: “Diseases and Disorders of the Ear, Nose, Mouth and Throat — the grouper's crossing between diagnoses and procedures: a principal diagnosis sets the MDC, and same-MDC procedures move the stay to its surgical DRGs.”
  • 02HA0QZ — Insertion of Implantable Heart Assist System into Heart, Open Approach [Same-MDC procedure]: “Insertion of Implantable Heart Assist System into Heart, Open Approach — grouped in MDC PRE, the procedure side of this code's crossing.” · check together
  • 02HA0RZ — Insertion of Short-term External Heart Assist System into Heart, Open Approach [Same-MDC procedure]: “Insertion of Short-term External Heart Assist System into Heart, Open Approach — grouped in MDC PRE, the procedure side of this code's crossing.” · check together
  • 02HA3QZ — Insertion of Implantable Heart Assist System into Heart, Percutaneous Approach [Same-MDC procedure]: “Insertion of Implantable Heart Assist System into Heart, Percutaneous Approach — grouped in MDC PRE, the procedure side of this code's crossing.” · check together
  • 02HA4QZ — Insertion of Implantable Heart Assist System into Heart, Percutaneous Endoscopic Approach [Same-MDC procedure]: “Insertion of Implantable Heart Assist System into Heart, Percutaneous Endoscopic Approach — grouped in MDC PRE, the procedure side of this code's crossing.” · check together
  • 02RA0LZ — Replacement of Heart with Biologic and Synthetic Substitute, Autoregulated Electrohydraulic, Open Approach [Same-MDC procedure]: “Replacement of Heart with Biologic and Synthetic Substitute, Autoregulated Electrohydraulic, Open Approach — grouped in MDC PRE, the procedure side of this code's crossing.” · check together
  • and 28252 more

Nearest codes (40)

  • S01 — Open wound of head [Sibling]
  • S01.149S — Puncture wound with foreign body of unspecified eyelid and periocular area, sequela [Sibling]
  • S01.15 — Open bite of eyelid and periocular area [Sibling]
  • S01.151 — Open bite of right eyelid and periocular area [Sibling]
  • S01.151A — Open bite of right eyelid and periocular area, initial encounter [Sibling]
  • S01.151D — Open bite of right eyelid and periocular area, subsequent encounter [Sibling]
  • S01.151S — Open bite of right eyelid and periocular area, sequela [Sibling]
  • S01.152 — Open bite of left eyelid and periocular area [Sibling]
  • and 32 more

Referenced by Other Codes

Clinical classification (AHRQ CCSR):INJ011 — Open wounds of head and neck, initial encounter (default).

Clinical Classifications Software Refined (CCSR) for ICD-10-CM Diagnoses. Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality.

Potential MS-DRG Relationships (FY2026)

Not on the CMS CC/MCC list — as a secondary diagnosis this code does not change MS-DRG severity.

Named in the grouper logic of 9 MS-DRGs: DRG 011 (MDC PRE), DRG 012 (MDC PRE), DRG 013 (MDC PRE), DRG 154 (MDC 03), DRG 155 (MDC 03), DRG 156 (MDC 03), DRG 963 (MDC 24), DRG 964 (MDC 24), DRG 965 (MDC 24).

From the CMS MS-DRG Definitions Manual (Appendices B and C). Actual DRG assignment depends on the complete claim.

Official ICD-10-CM tabular notes on other codes that name S01.21XA or its code family.

1 Excludes1 notes: S00 (via S01.-).

3 Code Also instructions: S04 (via S01.-), S06 (via S01.-), S09.1 (via S01.-).

Frequently Asked Questions (FAQ) & Clinical Guidance

Does S01.21XA require a 7th character?

Yes. The appropriate 7th character is to be added to each code from category S01.

Nearest Codes in This Family

Official ICD-10-CM classifications closest to S01.21XA in its code family, with their registry titles.

  • S01.20 — Unspecified open wound of nose
  • S01.20XA — Unspecified open wound of nose, initial encounter
  • S01.20XD — Unspecified open wound of nose, subsequent encounter
  • S01.20XS — Unspecified open wound of nose, sequela
  • S01.21 — Laceration without foreign body of nose
  • S01.21XD — Laceration without foreign body of nose, subsequent encounter
  • S01.21XS — Laceration without foreign body of nose, sequela
  • S01.22 — Laceration with foreign body of nose
  • S01.22XA — Laceration with foreign body of nose, initial encounter
  • S01.22XD — Laceration with foreign body of nose, subsequent encounter

View all codes in the S01 family