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S04.70XD ICD-10-CM Code: Injury of accessory nerve, unspecified side, subsequent 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.

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

Injury of accessory nerve, unspecified side, subsequent encounter is a billable ICD-10-CM diagnosis code (S04.70D).

Official Tabular Instructional Notes

Sequencing, inclusion, and exclusion notes published for S04.70XD 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

Excludes2 — Not Included Here

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

Code First

Underlying conditions that must be sequenced before this code.

  • any associated intracranial injury (S06.-)

Code Also

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

  • any associated:
  • open wound of head (S01.-)
  • skull fracture (S02.-)
  • for any associated infection

Frequently Compared Codes

The official Excludes notes on S04.70XD 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 S04.70XD 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 Code Also instructions

  • S01 — Open wound of head [Code Also](via S04.-): “injury of cranial nerve (S04.-)” · check together

Clinical classification (CCSR)

  • INJ062 — Injury to nerves, muscles and tendons, subsequent encounter [CCSR]

Potential MS-DRG

  • DRG 949 — AFTERCARE WITH CC/MCC [MS-DRG]: “AFTERCARE WITH CC/MCC (MDC 23)”
  • DRG 950 — AFTERCARE WITHOUT CC/MCC [MS-DRG]: “AFTERCARE WITHOUT CC/MCC (MDC 23)”

MDC crossing · procedures (1235)

  • MDC 23 — Factors Influencing Health Status and Other Contacts with Health Services [MDC crossing]: “Factors Influencing Health Status and Other Contacts with Health Services — 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.”
  • F003GKZ — Communicative/Cognitive Integration Skills Assessment of Neurological System - Whole Body using Audiovisual Equipment [Same-MDC procedure]: “Communicative/Cognitive Integration Skills Assessment of Neurological System - Whole Body using Audiovisual Equipment — grouped in MDC 23, the procedure side of this code's crossing.” · check together
  • F003GMZ — Communicative/Cognitive Integration Skills Assessment of Neurological System - Whole Body using Augmentative / Alternative Communication Equipment [Same-MDC procedure]: “Communicative/Cognitive Integration Skills Assessment of Neurological System - Whole Body using Augmentative / Alternative Communication Equipment — grouped in MDC 23, the procedure side of this code's crossing.” · check together
  • F003GPZ — Communicative/Cognitive Integration Skills Assessment of Neurological System - Whole Body using Computer [Same-MDC procedure]: “Communicative/Cognitive Integration Skills Assessment of Neurological System - Whole Body using Computer — grouped in MDC 23, the procedure side of this code's crossing.” · check together
  • F003GYZ — Communicative/Cognitive Integration Skills Assessment of Neurological System - Whole Body using Other Equipment [Same-MDC procedure]: “Communicative/Cognitive Integration Skills Assessment of Neurological System - Whole Body using Other Equipment — grouped in MDC 23, the procedure side of this code's crossing.” · check together
  • F003GZZ — Communicative/Cognitive Integration Skills Assessment of Neurological System - Whole Body [Same-MDC procedure]: “Communicative/Cognitive Integration Skills Assessment of Neurological System - Whole Body — grouped in MDC 23, the procedure side of this code's crossing.” · check together
  • and 1230 more

Nearest codes (40)

  • S04 — Injury of cranial nerve [Sibling]
  • S04.52 — Injury of facial nerve, left side [Sibling]
  • S04.52XA — Injury of facial nerve, left side, initial encounter [Sibling]
  • S04.52XD — Injury of facial nerve, left side, subsequent encounter [Sibling]
  • S04.52XS — Injury of facial nerve, left side, sequela [Sibling]
  • S04.6 — Injury of acoustic nerve [Sibling]
  • S04.60 — Injury of acoustic nerve, unspecified side [Sibling]
  • S04.60XA — Injury of acoustic nerve, unspecified side, initial encounter [Sibling]
  • and 32 more

Referenced by Other Codes

Clinical classification (AHRQ CCSR):INJ062 — Injury to nerves, muscles and tendons, subsequent 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 2 MS-DRGs: DRG 949 (MDC 23), DRG 950 (MDC 23).

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 S04.70XD or its code family.

1 Code Also instructions: S01 (via S04.-).

Frequently Asked Questions (FAQ) & Clinical Guidance

Does S04.70XD require a 7th character?

Yes. The appropriate 7th character is to be added to each code from category S04.

Nearest Codes in This Family

Official ICD-10-CM classifications closest to S04.70XD in its code family, with their registry titles.

  • S04.62XD — Injury of acoustic nerve, left side, subsequent encounter
  • S04.62XS — Injury of acoustic nerve, left side, sequela
  • S04.7 — Injury of accessory nerve
  • S04.70 — Injury of accessory nerve, unspecified side
  • S04.70XA — Injury of accessory nerve, unspecified side, initial encounter
  • S04.70XS — Injury of accessory nerve, unspecified side, sequela
  • S04.71 — Injury of accessory nerve, right side
  • S04.71XA — Injury of accessory nerve, right side, initial encounter
  • S04.71XD — Injury of accessory nerve, right side, subsequent encounter
  • S04.71XS — Injury of accessory nerve, right side, sequela

View all codes in the S04 family