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S11.85XA ICD-10-CM Code: Open bite of other specified part of neck, 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 604 — TRAUMA TO THE SKIN, SUBCUTANEOUS TISSUE AND BREAST WITH MCC (MDC 09)
  • MS-DRG 605 — TRAUMA TO THE SKIN, SUBCUTANEOUS TISSUE AND BREAST WITHOUT MCC (MDC 09)
  • 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

Open bite of other specified part of neck, initial encounter is a billable ICD-10-CM diagnosis code (S11.85A).

Official Tabular Instructional Notes

Sequencing, inclusion, and exclusion notes published for S11.85XA in the official ICD-10-CM tabular list.

Includes

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

  • injuries of nape
  • injuries of supraclavicular region
  • injuries of throat

Inclusion Terms

Alternative terms the tabular list files under this code.

  • Bite of other specified part of neck NOS

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:
  • spinal cord injury (S14.0, S14.1-)
  • wound infection

Frequently Compared Codes

The official Excludes notes on S11.85XA 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 S11.85XA 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]
  • S10-S19 — Injuries to the neck [Hierarchy]

Referenced by Use Additional Code instructions

  • S17 — Crushing injury of neck [Use Additional Code](via S11.-): “open wound of neck (S11.-)” · check together
  • T71.16 — Asphyxiation due to hanging [Use Additional Code](via S11.-): “open wound of neck (S11.-)” · check together

Referenced by Code Also instructions

  • S13.1 — Subluxation and dislocation of cervical vertebrae [Code Also](via S11.-): “open wound of neck (S11.-)” · check together
  • S14 — Injury of nerves and spinal cord at neck level [Code Also](via S11.-): “open wound of neck (S11.-)” · check together
  • S15 — Injury of blood vessels at neck level [Code Also](via S11.-): “any associated open wound (S11.-)” · check together
  • S16 — Injury of muscle, fascia and tendon at neck level [Code Also](via S11.-): “any associated open wound (S11.-)” · check together

Clinical classification (CCSR)

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

Potential MS-DRG

  • 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 604 — TRAUMA TO THE SKIN, SUBCUTANEOUS TISSUE AND BREAST WITH MCC [MS-DRG]: “TRAUMA TO THE SKIN, SUBCUTANEOUS TISSUE AND BREAST WITH MCC (MDC 09)”
  • DRG 605 — TRAUMA TO THE SKIN, SUBCUTANEOUS TISSUE AND BREAST WITHOUT MCC [MS-DRG]: “TRAUMA TO THE SKIN, SUBCUTANEOUS TISSUE AND BREAST WITHOUT MCC (MDC 09)”
  • 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)”
  • DRG 965 — OTHER MULTIPLE SIGNIFICANT TRAUMA WITHOUT CC/MCC [MS-DRG]: “OTHER MULTIPLE SIGNIFICANT TRAUMA WITHOUT CC/MCC (MDC 24)”

MDC crossing · procedures (30486)

  • 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 09 — Diseases and Disorders of the Skin, Subcutaneous Tissue and Breast [MDC crossing]: “Diseases and Disorders of the Skin, Subcutaneous Tissue and Breast — 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 30481 more

Nearest codes (40)

  • S11 — Open wound of neck [Sibling]
  • S11.80XA — Unspecified open wound of other specified part of neck, initial encounter [Sibling]
  • S11.80XD — Unspecified open wound of other specified part of neck, subsequent encounter [Sibling]
  • S11.80XS — Unspecified open wound of other specified part of neck, sequela [Sibling]
  • S11.81 — Laceration without foreign body of other specified part of neck [Sibling]
  • S11.81XA — Laceration without foreign body of other specified part of neck, initial encounter [Sibling]
  • S11.81XD — Laceration without foreign body of other specified part of neck, subsequent encounter [Sibling]
  • S11.81XS — Laceration without foreign body of other specified part of neck, sequela [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 8 MS-DRGs: DRG 011 (MDC PRE), DRG 012 (MDC PRE), DRG 013 (MDC PRE), DRG 604 (MDC 09), DRG 605 (MDC 09), 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 S11.85XA or its code family.

2 Use Additional Code instructions: S17 (via S11.-), T71.16 (via S11.-).

4 Code Also instructions: S13.1 (via S11.-), S14 (via S11.-), S15 (via S11.-), S16 (via S11.-).

Frequently Asked Questions (FAQ) & Clinical Guidance

Does S11.85XA require a 7th character?

Yes. The appropriate 7th character is to be added to each code from category S11.

Nearest Codes in This Family

Official ICD-10-CM classifications closest to S11.85XA in its code family, with their registry titles.

  • S11.84 — Puncture wound with foreign body of other specified part of neck
  • S11.84XA — Puncture wound with foreign body of other specified part of neck, initial encounter
  • S11.84XD — Puncture wound with foreign body of other specified part of neck, subsequent encounter
  • S11.84XS — Puncture wound with foreign body of other specified part of neck, sequela
  • S11.85 — Open bite of other specified part of neck
  • S11.85XD — Open bite of other specified part of neck, subsequent encounter
  • S11.85XS — Open bite of other specified part of neck, sequela
  • S11.89 — Other open wound of other specified part of neck
  • S11.89XA — Other open wound of other specified part of neck, initial encounter
  • S11.89XD — Other open wound of other specified part of neck, subsequent encounter

View all codes in the S11 family