2027 ICD-10-CM Diagnosis Code G83.81Brown-Sequard syndrome
ICD-10-CM Codes›G00–G99›G80-G83›G83
- Billable — Valid for Submission
- Risk Adjusts — HCC 254
- Chronic Condition
G83.81 is a billable ICD-10-CM diagnosis code for Brown-Sequard syndrome. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 91 through 93. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Paralysis (other than cerebral palsy).
For Medicare Advantage risk adjustment, G83.81 maps to CMS-HCC Category 254 (Monoplegia, Other Paralytic Syndromes) under the V28 model, adding a risk factor of about 0.321 for a community, non-dual, aged beneficiary in payment year 2027.
Code Identity
Code Classification
Medicare Risk Adjustment (HCC)Billing
G83.81 maps to a payment category in the CMS-HCC model used to risk-adjust Medicare Advantage payments. Weights are the published community factors for payment year 2027.
Source: CMS Payment Year 2027 risk adjustment mappings and model software. Weights are relative factors, not dollar amounts; a beneficiary's total RAF also includes demographics and interactions. Browse all CMS-HCC categories.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Brown-Séquard syndrome
- Brown-Séquard syndrome caused by ionizing radiation
- Brown-Séquard syndrome due to cervical spondylosis
- Brown-Séquard syndrome due to decompression sickness
- Brown-Séquard syndrome due to fracture of vertebra
- Brown-Séquard syndrome due to gunshot wound
- Brown-Séquard syndrome due to ischemia
- Brown-Séquard syndrome due to multiple sclerosis
- Brown-Séquard syndrome due to neoplastic disease
- Brown-Séquard syndrome due to prolapse of intervertebral disc
- Brown-Séquard syndrome due to trauma
- Myelopathy due to intervertebral disc disease
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to G83.81: its own notes plus those printed at G83.8, G83, and Chapter 6. A note printed at a category, block or chapter applies to every code under it.
Includes
Further defines, or gives examples of, the content of the category.
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Notes
General instructions on how these codes are used.
- This category is to be used only when the listed conditions are reported without further specification, or are stated to be old or longstanding but of unspecified cause. The category is also for use in multiple coding to identify these conditions resulting from any cause.
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Syndrome See Also: Disease;
Brown-Sequard G83.81
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Brown-Sequard Syndrome
a syndrome associated with injury to the lateral half of the spinal cord. the condition is characterized by the following clinical features (which are found below the level of the lesion): contralateral hemisensory anesthesia to pain and temperature, ipsilateral loss of propioception, and ipsilateral motor paralysis. tactile sensation is generally spared. (from adams et al., principles of neurology, 6th ed, p162).
Patient EducationClinical
Spinal Cord Injuries
Your spinal cord is a bundle of nerves that runs down the middle of your back. It carries signals back and forth between your body and your brain. A spinal cord injury disrupts the signals. Spinal cord injuries usually begin with a blow that fractures (breaks) or dislocates your vertebrae, the bone disks that make up your spine.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert G83.81 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About G83.81Overview
What is the ICD-10 code for Brown-Sequard syndrome?
The ICD-10-CM code for Brown-Sequard syndrome is G83.81 (sometimes written as G8381). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is G83.81 (Other specified paralytic syndromes) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report Brown-Sequard syndrome on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does G83.81 group to?
When Brown-Sequard syndrome is the principal diagnosis on an inpatient stay, it groups to MS-DRG 91, 92, 93, with relative weights from 0.7783 to 1.7050 depending on complications. Higher weights mean higher Medicare reimbursement.
Can G83.81 be reported with S14?
Not as a rule. The Excludes1 note at G83.8, which applies to G83.81, lists "paralytic syndromes due to current spinal cord injury-code to spinal cord injury (S14, S24, S34)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).
What is the ICD-9 equivalent of G83.81?
Under the General Equivalence Mappings, Brown-Sequard syndrome converts to ICD-9-CM 344.89 (oth spcf paralytic synd). The mapping is approximate, so confirm the match fits the documentation.
What HCC is G83.81?
G83.81 (Brown-Sequard syndrome) maps to CMS-HCC Category 254 (Monoplegia, Other Paralytic Syndromes), commonly written as HCC 254, in the CMS-HCC V28 model used for Medicare Advantage risk adjustment in payment year 2027. It mapped to HCC 104 under the retired V24 model. It also maps in the PACE (CMS-HCC V22), ESRD (V21), and ESRD (V24) models. It does not map to any RxHCC in the Part D prescription drug model.
Does G83.81 risk-adjust for Medicare Advantage payment?
Yes. When documented and reported on a Medicare Advantage encounter, G83.81 adds a risk adjustment factor of about 0.321 to the beneficiary's RAF score for a community, non-dual, aged enrollee (published V28 weights range from 0.000 to 0.365 depending on the payment segment). A more severe related category (HCC 180, HCC 181, HCC 191, HCC 192, and HCC 253) supersedes it when both are reported. See the full factor table on the HCC 254 category page.
