2026 ICD-10-CM Diagnosis Code S78.021APartial traumatic amputation at right hip joint, initial encounter

ICD-10-CM Codes›S00–T88›S70-S79›S78

ICD-10-CM S78.021A
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

S78.021A is a billable ICD-10-CM diagnosis code for partial traumatic amputation at right hip joint, initial encounter. The 7th character A marks it as an initial encounter code, used while the patient is receiving active treatment. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 913 through 914, 963 through 965. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Amputation of a limb, initial encounter.

Code Identity

ICD-10-CM Code
S78.021A
Billable Status
Yes — Valid for Submission
Code Describes
Partial traumatic amputation at right hip joint, initial encounter
Short Description
Partial traumatic amputation at right hip joint, init encntr
Parent Code
S78.021
Partial traumatic amputation at right hip joint

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionS70-S79Injuries to the hip and thigh
CategoryS78Traumatic amputation of hip and thigh
This CodeS78.021APartial traumatic amputation at right hip joint, initial encounter

Coding GuidelinesGuidance

The appropriate 7th character is to be added to each code from block Traumatic amputation of hip and thigh (S78). Use the following options for the applicable episode of care:

  • A - initial encounter
  • D - subsequent encounter
  • S - sequela

Source: ICD-10-CM Official Guidelines for Coding and Reporting, FY 2026, published by CMS and the National Center for Health Statistics.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR INJ014
Amputation of a limb, initial encounter
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Limb Loss

People can lose all or part of an arm or leg for many reasons. Common ones include:

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert S78.021A to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
897.2 Amput above knee, unilat
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About S78.021AOverview

Is S78.021A (Partial traumatic amputation at right hip joint) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report partial traumatic amputation at right hip joint, initial encounter on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What does the 7th character A in S78.021A mean?

The final character A marks the initial encounter: use it while the patient is receiving active treatment for partial traumatic amputation at right hip joint, such as an emergency visit or first evaluation.

What MS-DRG does S78.021A group to?

When partial traumatic amputation at right hip joint, initial encounter is the principal diagnosis on an inpatient stay, it groups to MS-DRG 913, 914, 963, 964, 965, with relative weights from 0.8855 to 2.7338 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of S78.021A?

Under the General Equivalence Mappings, partial traumatic amputation at right hip joint, initial encounter converts to ICD-9-CM 897.2 (amput above knee, unilat). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.