2027 ICD-10-CM Diagnosis Code G65.0Sequelae of Guillain-Barre syndrome
ICD-10-CM Codes›G00–G99›G60-G65›G65
- Billable — Valid for Submission
- Not Chronic
G65.0 is a billable ICD-10-CM diagnosis code for sequelae of Guillain-Barre syndrome. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 73 through 74. Coders also document this condition as ophthalmoplegia due to and following Guillain-Barré syndrome. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Sequela of specified nervous system conditions.
G65.0 no longer risk-adjusts for Medicare Advantage: it mapped to HCC 75 under the retired CMS-HCC V24 model through payment year 2025 but maps to no category in the live V28 model. It still risk-adjusts in the PACE (CMS-HCC V22) category 75, ESRD (V21) category 75, ESRD (V24) category 75, and RxHCC Part D (V08) category 158 for payment year 2027.
Code Identity
Code Classification
Medicare Risk Adjustment (HCC)Billing
G65.0 no longer risk-adjusts for Medicare Advantage: it maps to no payment category in the live CMS-HCC V28 model, although it still risk-adjusts in the other CMS models shown below.
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.
- Ophthalmoplegia due to and following Guillain-Barré syndrome
- Ophthalmoplegia due to neuropathy
- Sequela of Guillain Barre syndrome
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to G65.0: its own notes plus those printed at G65, block G60-G65, and Chapter 6. A note printed at a category, block or chapter applies to every code under it.
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)
Code First
The underlying condition named in the note is sequenced before this code.
- condition resulting from (sequela) of inflammatory and toxic polyneuropathies
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.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Guillain-Barre Syndrome
Guillain-Barre syndrome is a rare disorder that causes your immune system to attack your peripheral nervous system (PNS). The PNS nerves connect your brain and spinal cord with the rest of your body. Damage to these nerves makes it hard for them to transmit signals. As a result, your muscles have trouble responding to your brain.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert G65.0 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About G65.0Overview
What is the ICD-10 code for sequelae of Guillain-Barre syndrome?
The ICD-10-CM code for sequelae of Guillain-Barre syndrome is G65.0 (sometimes written as G650). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is G65.0 (Sequelae of inflammatory and toxic polyneuropathies) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report sequelae of Guillain-Barre syndrome on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does G65.0 group to?
When sequelae of Guillain-Barre syndrome is the principal diagnosis on an inpatient stay, it groups to MS-DRG 74, 73, with relative weights from 1.0172 to 1.5773 depending on complications. Higher weights mean higher Medicare reimbursement.
Can G65.0 be reported with M79.2?
Not as a rule. The Excludes1 note at block G60-G65, which applies to G65.0, lists "neuralgia NOS (M79.2)". 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 coded first with G65.0?
The Code First note at G65, which applies to G65.0, reads: condition resulting from (sequela) of inflammatory and toxic polyneuropathies. When one of these applies, it is sequenced before G65.0.
Does G65.0 risk-adjust for Medicare Advantage payment?
Not for Medicare Advantage. G65.0 mapped to HCC 75 in the retired CMS-HCC V24 model, which last determined payment in 2025, but it maps to no category in the live V28 model; see all codes that no longer risk-adjust. It still risk-adjusts in the PACE (CMS-HCC V22) category 75 (Myasthenia Gravis/Myoneural Disorders and Guillain-Barre Syndrome/Inflammatory and Toxic Neuropathy), ESRD (V21) category 75 (Polyneuropathy), ESRD (V24) category 75 (Myasthenia Gravis/Myoneural Disorders and Guillain-Barre Syndrome/Inflammatory and Toxic Neuropathy), and RxHCC Part D (V08) category 158 (Inflammatory and Toxic Neuropathy).
