2026 ICD-10-CM Diagnosis Code S19.84XSOther specified injuries of thyroid gland, sequela
S19.84XS is a billable ICD-10-CM diagnosis code for other specified injuries of thyroid gland, sequela. The 7th character S marks it as a sequela code, which reports a problem that remains after the original condition has resolved. 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. The code is exempt from POA reporting. Coders also document this condition as contusion of neck. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Injury, sequela.
Code Identity
Code Classification
Present on Admission (POA)Billing
S19.84XS is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Contusion of neck
- Contusion of thyroid gland
- Fragmentation of thyroid gland
- Injury of thyroid gland
Coding GuidelinesGuidance
The appropriate 7th character is to be added to each code from block Other specified and unspecified injuries of neck (S19). 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.
Patient EducationClinical
Thyroid Diseases
Your thyroid is a small, butterfly-shaped gland in the front of your neck. It makes hormones that control the way the body uses energy. These hormones affect nearly every organ in your body and control many of your body's most important functions. For example, they affect your breathing, heart rate, weight, digestion, and moods.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert S19.84XS to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About S19.84XSOverview
Is S19.84XS (Other specified injuries of thyroid gland) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report other specified injuries of thyroid gland, sequela on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What does the 7th character S in S19.84XS mean?
The final character S makes this a sequela code: it reports a lingering problem that remains after the other specified injuries of thyroid gland itself has resolved, not the original event.
What MS-DRG does S19.84XS group to?
When other specified injuries of thyroid gland, sequela is the principal diagnosis on an inpatient stay, it groups to MS-DRG 913, 914, with relative weights from 0.8855 to 1.6346 depending on complications. Higher weights mean higher Medicare reimbursement.
Is S19.84XS exempt from POA reporting?
Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for other specified injuries of thyroid gland, sequela on inpatient claims.
What is the ICD-9 equivalent of S19.84XS?
Under the General Equivalence Mappings, other specified injuries of thyroid gland, sequela converts to ICD-9-CM 908.9 (late effect injury NOS). The mapping is approximate, so confirm the match fits the documentation.
Footnotes
[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.
