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S90.30XA ICD-10-CM Code: Contusion of unspecified foot, initial encounter

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

Coding at a Glance

7th character
Required — see the character table on this page
Tabular directives
1 inclusion term · 5 Excludes2

Inpatient Payment Groups (MS-DRG)

Potential MS-DRG participation — not a DRG assignment.

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 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.

Code Overview

Contusion of unspecified foot, initial encounter is a billable ICD-10-CM diagnosis code (S90.30XA).

MedCoder summary Summary composed by MedCoder from this code's official ICD-10-CM record. The tabular instructional notes themselves appear verbatim below.

Official Tabular Instructional Notes

Sequencing, inclusion, and exclusion notes published for S90.30XA in the official ICD-10-CM tabular list.

Notes without a marker are published on S90.30XA itself; “inherited from” names the category or block whose note applies here.

Inclusion Terms

Alternative terms the tabular list files under this code.

  • Contusion of foot NOS

Source: inherited from S90.30

Excludes2 — Not Included Here

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

7th Character Guide

"The appropriate 7th character is to be added to each code from category S90"

  • A — initial encounter (this page’s code)
  • D — subsequent encounter
  • S — sequela

How the encounter character is assigned. “Initial encounter” means the patient is receiving active treatment for the condition — it is not limited to the first visit, and a different or new provider giving active treatment still assigns it. “Subsequent encounter” covers care during the healing or recovery phase after active treatment. “Sequela” is for complications or conditions that arise as a direct result of the original condition.

ICD-10-CM Official Guidelines for Coding and Reporting, Section I.C.19.a (paraphrased by MedCoder).

Variant codes in this family

S90.30XA, S90.30XD, S90.30XS

Character meanings are CMS's official 7th-character extensions for this family, as carried in each variant code's official description; variant codes are registry rows. The explanation of how the encounter character is assigned is MedCoder editorial, distinct from the official content above it.

Change history

  • FY2016 — October 1, 2015
    In the code set at ICD-10-CM adoption
    Contusion of unspecified foot, initial encounter

No changes since FY2016 — additions, deletions, description changes and billable-status changes are tracked through FY2027 (effective October 1, 2026), and none are recorded for this code. Note changes are tracked from FY2027 only.

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 in Claim Check.

Relationships & Classification

Other codes that name S90.30XA or its code family, from the CMS ICD-10-CM tabular instructional notes. Tabular-note edges are stored at the code family level that carries each note.

Referenced by 11 Excludes2 notes: S80 — Superficial injury of knee and lower leg (via S90.-), S80-S89 — Injuries to the knee and lower leg (S80-S89) (via S90.-), S81 — Open wound of knee and lower leg (via S90.-), S82 — Fracture of lower leg, including ankle (via S90.-), S83 — Dislocation and sprain of joints and ligaments of knee (via S90.-), S84 — Injury of nerves at lower leg level (via S90.-), S85 — Injury of blood vessels at lower leg level (via S90.-), S86 — Injury of muscle, fascia and tendon at lower leg level (via S90.-), S87 — Crushing injury of lower leg (via S90.-), S88 — Traumatic amputation of lower leg (via S90.-), S89 — Other and unspecified injuries of lower leg (via S90.-).

These codes’ tabular lists name this diagnosis as distinct — both may be reported when both are documented.

MS-DRG Grouper Relationships (FY2026)

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

Potential MS-DRG participation — not a DRG assignment.

Named in the grouper logic of 5 MS-DRGs: 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.

Clinical classification (AHRQ CCSR):INJ017 — Superficial injury; contusion, 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.

Related Codes

Same condition, opposite side

Same category and title, differing only in which side of the body is affected.

S90.31XA — Contusion of right foot, initial encounter (right)Compare S90.30XA vs S90.31XA →, S90.32XA — Contusion of left foot, initial encounter (left)Compare S90.30XA vs S90.32XA →

Same injury, other encounter phase

Same injury, coded at a different phase of treatment via the 7th character.

S90.30XD — Contusion of unspecified foot, subsequent encounterCompare S90.30XA vs S90.30XD →, S90.30XS — Contusion of unspecified foot, sequelaCompare S90.30XA vs S90.30XS →

Same clinical category (CCSR)

AHRQ's Clinical Classifications Software groups these diagnoses under the same clinical category (Superficial injury; contusion, initial encounter).

+763 more

Same Index main term, other category

The ICD-10-CM Index to Diseases and Injuries files this code under the main terms “Contusion”, “Black”; these codes share that main term but sit in a different category of the Tabular List.

S50.1 — Contusion of forearm (forearm), S60.00 — Contusion of unspecified finger without damage to nail (finger), S60.01 — Contusion of thumb without damage to nail (thumb), S60.02 — Contusion of index finger without damage to nail (finger, index), S60.03 — Contusion of middle finger without damage to nail (finger, middle), S60.04 — Contusion of ring finger without damage to nail (finger, ring), S60.05 — Contusion of little finger without damage to nail (finger, little), S60.10 — Contusion of unspecified finger with damage to nail (finger, with damage to nail), S60.11 — Contusion of thumb with damage to nail (thumb, with damage to nail), S60.12 — Contusion of index finger with damage to nail (finger, index, with damage to nail), S60.13 — Contusion of middle finger with damage to nail (finger, middle, with damage to nail), S60.14 — Contusion of ring finger with damage to nail (finger, ring, with damage to nail), S60.15 — Contusion of little finger with damage to nail (finger, little, with damage to nail), S60.21 — Contusion of wrist (wrist), S60.22 — Contusion of hand (palm), S70.0 — Contusion of hip (hip), S70.1 — Contusion of thigh (thigh), S80.0 — Contusion of knee (knee), S80.1 — Contusion of lower leg (leg), T14.8 — Other injury of unspecified body region, +84 more

Lab tests where this diagnosis supports Medicare coverage (NCD)

Medicare's National Coverage Determination (NCD) program lists this diagnosis as medical justification for these lab tests.

Partial Thromboplastin Time (PTT) Test, Prothrombin Time Test and INR (PT/INR)

Contextual Map

Every relationship of S90.30XA 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

Referenced by Excludes2 notes (11)

Clinical classification (CCSR)

MS-DRG Grouper

MDC crossing

  • 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. 7,376 same-MDC procedures group here; browse them on the MDC page.”
  • MDC 24 — Multiple Significant Trauma[MDC crossing]: “Multiple Significant Trauma — 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. 22,957 same-MDC procedures group here; browse them on the MDC page.”

Nearest codes (40)

Change history

  • FY2016 — In the code set at ICD-10-CM adoption [Change history]

Frequently Asked Questions (FAQ) & Clinical Guidance

Does S90.30XA require a 7th character?

Yes. The appropriate 7th character is to be added to each code from category S90.

Nearest Codes in This Family

Official ICD-10-CM classifications closest to S90.30XA in its code family, with their registry titles.

View all codes in the S90 family