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T21.57XD ICD-10-CM Code: Corrosion of first degree of female genital region, 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

Corrosion of first degree of female genital region, subsequent encounter is a billable ICD-10-CM diagnosis code (T21.57D).

Official Tabular Instructional Notes

Sequencing, inclusion, and exclusion notes published for T21.57XD in the official ICD-10-CM tabular list.

Includes

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

  • burns and corrosion of hip region
  • burns and corrosions of first degree [erythema]
  • burns and corrosions of second degree [blisters][epidermal loss]
  • burns and corrosions of third degree [deep necrosis of underlying tissue] [full- thickness skin loss]

Inclusion Terms

Alternative terms the tabular list files under this code.

  • Corrosion of first degree of labium (majus) (minus)
  • Corrosion of first degree of perineum
  • Corrosion of first degree of vulva

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.

  • (T51-T65) to identify chemical and intent

Use Additional Code

Supplementary codes the tabular list directs you to add.

  • external cause code to identify place (Y92)
  • Use additional code from category T31 or T32 to identify extent of body surface involved

Frequently Compared Codes

The official Excludes notes on T21.57XD 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 T21.57XD 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]
  • T20-T25 — Burns and corrosions of external body surface, specified by site [Hierarchy]

Referenced by Excludes2 notes

  • T22 — Burn and corrosion of shoulder and upper limb, except wrist and hand [Excludes2](via T21.-): “burn and corrosion of interscapular region (T21.-)” · check together
  • T24 — Burn and corrosion of lower limb, except ankle and foot [Excludes2](via T21.-): “burn and corrosion of hip region (T21.-)” · check together

Clinical classification (CCSR)

  • INJ056 — Burns and corrosion, 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)

  • T21 — Burn and corrosion of trunk [Sibling]
  • T21.52XD — Corrosion of first degree of abdominal wall, subsequent encounter [Sibling]
  • T21.52XS — Corrosion of first degree of abdominal wall, sequela [Sibling]
  • T21.53 — Corrosion of first degree of upper back [Sibling]
  • T21.53XA — Corrosion of first degree of upper back, initial encounter [Sibling]
  • T21.53XD — Corrosion of first degree of upper back, subsequent encounter [Sibling]
  • T21.53XS — Corrosion of first degree of upper back, sequela [Sibling]
  • T21.54 — Corrosion of first degree of lower back [Sibling]
  • and 32 more

Referenced by Other Codes

Clinical classification (AHRQ CCSR):INJ056 — Burns and corrosion, 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 T21.57XD or its code family.

2 Excludes2 notes: T22 (via T21.-), T24 (via T21.-).

Frequently Asked Questions (FAQ) & Clinical Guidance

Does T21.57XD require a 7th character?

Yes. The appropriate 7th character is to be added to each code from category T21.

Nearest Codes in This Family

Official ICD-10-CM classifications closest to T21.57XD in its code family, with their registry titles.

  • T21.56XA — Corrosion of first degree of male genital region, initial encounter
  • T21.56XD — Corrosion of first degree of male genital region, subsequent encounter
  • T21.56XS — Corrosion of first degree of male genital region, sequela
  • T21.57 — Corrosion of first degree of female genital region
  • T21.57XA — Corrosion of first degree of female genital region, initial encounter
  • T21.57XS — Corrosion of first degree of female genital region, sequela
  • T21.59 — Corrosion of first degree of other site of trunk
  • T21.59XA — Corrosion of first degree of other site of trunk, initial encounter
  • T21.59XD — Corrosion of first degree of other site of trunk, subsequent encounter
  • T21.59XS — Corrosion of first degree of other site of trunk, sequela

View all codes in the T21 family