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G83.9 ICD-10-CM Code: Paralytic syndrome, unspecified

Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.

Coding at a Glance

Tabular directives
1 inclusion term
Risk adjustment
CMS-HCC V28: 1 category · CMS-HCC V22 category 104

Inpatient Payment Groups (MS-DRG)

Potential MS-DRG participation — not a DRG assignment.

MS-DRGs this diagnosis helps define, as principal or secondary, per the CMS ICD-10-CM/PCS MS-DRG Definitions Manual v43, Appendix B.

  • MS-DRG 091 — OTHER DISORDERS OF NERVOUS SYSTEM WITH MCC (MDC 01)
  • MS-DRG 092 — OTHER DISORDERS OF NERVOUS SYSTEM WITH CC (MDC 01)
  • MS-DRG 093 — OTHER DISORDERS OF NERVOUS SYSTEM WITHOUT CC/MCC (MDC 01)

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.

Risk Adjustment (CMS-HCC)

Payment categories this diagnosis maps to under CMS-HCC V28, payment year 2026.

  • HCC 254 — Monoplegia, Other Paralytic Syndromes

Other models: CMS-HCC V22 HCC 104

Risk scores depend on the enrollee's full accepted diagnosis set and segment; a category mapping alone does not determine payment.

Coding instructions

Official Tabular Instructional Notes: the inclusion, exclusion and sequencing notes published for G83.9 in the official ICD-10-CM tabular list, quoted as published.

Source: CMS/CDC — ICD-10-CM Tabular ListRelease: FY2026Effective: October 1, 2025

Notes without a marker are published on G83.9 itself; “inherited from” names the category or block whose note applies here.

Includes

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

  • paralysis (complete) (incomplete), except as in G80-G82

Source: inherited from G83

Coder workflow for G83.9

MedCoder structured workflow — derived from this code’s own official record

Before you code G83.9

  1. Unspecified does not mean incorrect. When the record gives no greater specificity, G83.9 may be the appropriate code. Check the record for detail that supports a more specific sibling. An unspecified code is for records that do not provide the detail a more specific code needs; a query, not an assumption, is the route to specificity (Guidelines I.A.9.b, I.B.18).

    ReviewG83.0, G83.1, G83.2, G83.4, G83.5, G83.8

    See the relationships section · Guide: Other vs unspecified (NEC vs NOS) →

Choose the right path

  1. Does the record document the detail a more specific sibling code needs?
    Yes → Review the specific siblings in this subcategory.
    No → Continue — G83.9 is appropriate when the documentation goes no further.

    ReviewG83.0, G83.1, G83.2, G83.4, G83.5, G83.8

Consider G83.9. Then confirm the code is valid for the date of service in the Verify section.

Documentation check

The provider’s diagnostic statement
Codes are assigned from the provider’s documented diagnosis, not from clinical criteria, test values or a medication list (Guidelines I.A.19).
Any detail beyond this code’s title
What the record states that a more specific sibling code would capture — or its absence, which itself supports the unspecified code.

Coding decision scenarios

Pattern scenarios for this code’s structure — decision rules, not clinical cases

Documentation: The provider documents the condition in the terms of this code’s title and records no further detail.

Coding question: Is a more specific sibling code supportable?

Path: Review the specific siblings in this subcategory and what each requires the record to state.

Reason: A more specific code needs documentation of the distinguishing element; without it the unspecified code is appropriate, and a provider query is the route to specificity (Guidelines I.A.9.b, I.B.18).

ReviewG83.0, G83.1, G83.2, G83.4, G83.5, G83.8

Every row is derived from this code’s own record — its title, tabular notes, 7th-character family and same-category siblings — with fixed MedCoder wording; nothing is inferred about a patient. The official notes and guideline text are in the sections each row links to, and they control.

Code Overview

Paralytic syndrome, unspecified is a billable ICD-10-CM diagnosis code (G83.9).

MedCoder summary Summary composed by MedCoder from this code's official ICD-10-CM record. The tabular instructional notes themselves appear verbatim below.

Indexed Clinical Terms (11)

Official source data — entries quoted as published, in the Index’s own lookup phrasing

Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code. These are alphabetic-index entries shown as the Index writes them — lookup phrasing, not necessarily the wording of a final diagnosis.

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 in Claim Check.

Relationships & Classification

MedCoder structured relationships — computed from published CMS and AHRQ datasets

MS-DRG Grouper Relationships (FY2026)

Potential MS-DRG participation — not a DRG assignment.

FY2026 MS-DRG: not on the CMS CC/MCC list — as a secondary diagnosis this code does not change MS-DRG severity for that release.

Named in the grouper logic of 3 MS-DRGs: DRG 091 (MDC 01), DRG 092 (MDC 01), DRG 093 (MDC 01).

From the CMS MS-DRG Definitions Manual (Appendices B and C). Actual DRG assignment depends on the complete claim.

Clinical classification (AHRQ CCSR):NVS008 — Paralysis (other than cerebral palsy) (default).

Clinical Classifications Software Refined (CCSR) for ICD-10-CM Diagnoses. Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality.

Related Codes

Same CMS-HCC risk category (V28)

CMS maps these diagnoses to the same Hierarchical Condition Category (Monoplegia, Other Paralytic Syndromes) for risk-adjusted payment.

G83.31 — Monoplegia, unspecified affecting right dominant side, G83.32 — Monoplegia, unspecified affecting left dominant side, G83.33 — Monoplegia, unspecified affecting right nondominant side, G83.34 — Monoplegia, unspecified affecting left nondominant side, G83.5 — Locked-in state, G83.81 — Brown-Séquard syndrome, G83.82 — Anterior cord syndrome, G83.83 — Posterior cord syndrome, G83.84 — Todd's paralysis (postepileptic), G83.89 — Other specified paralytic syndromes, I69.031 — Monoplegia of upper limb following nontraumatic subarachnoid hemorrhage affecting right dominant side, I69.032 — Monoplegia of upper limb following nontraumatic subarachnoid hemorrhage affecting left dominant side, I69.033 — Monoplegia of upper limb following nontraumatic subarachnoid hemorrhage affecting right non-dominant side, I69.034 — Monoplegia of upper limb following nontraumatic subarachnoid hemorrhage affecting left non-dominant side, I69.039 — Monoplegia of upper limb following nontraumatic subarachnoid hemorrhage affecting unspecified side, I69.041 — Monoplegia of lower limb following nontraumatic subarachnoid hemorrhage affecting right dominant side, I69.042 — Monoplegia of lower limb following nontraumatic subarachnoid hemorrhage affecting left dominant side, I69.043 — Monoplegia of lower limb following nontraumatic subarachnoid hemorrhage affecting right non-dominant side, I69.044 — Monoplegia of lower limb following nontraumatic subarachnoid hemorrhage affecting left non-dominant side, I69.049 — Monoplegia of lower limb following nontraumatic subarachnoid hemorrhage affecting unspecified side, +98 more

Related risk categories

These categories interact through CMS's HCC hierarchy — one can suppress the other's risk-adjustment weight when both are present on a claim.

Quadriplegia, Paraplegia, Hemiplegia/Hemiparesis

Same clinical category (CCSR)

AHRQ's Clinical Classifications Software groups these diagnoses under the same clinical category (Paralysis (other than cerebral palsy)).

G83.12 — Monoplegia of lower limb affecting left dominant side, G83.13 — Monoplegia of lower limb affecting right nondominant side, G83.14 — Monoplegia of lower limb affecting left nondominant side, G83.20 — Monoplegia of upper limb affecting unspecified side, G83.21 — Monoplegia of upper limb affecting right dominant side, G83.22 — Monoplegia of upper limb affecting left dominant side, G83.23 — Monoplegia of upper limb affecting right nondominant side, G83.24 — Monoplegia of upper limb affecting left nondominant side, G83.30 — Monoplegia, unspecified affecting unspecified side, G83.31 — Monoplegia, unspecified affecting right dominant side, G83.32 — Monoplegia, unspecified affecting left dominant side, G83.33 — Monoplegia, unspecified affecting right nondominant side, G83.34 — Monoplegia, unspecified affecting left nondominant side, G83.4 — Cauda equina syndrome, G83.5 — Locked-in state, G83.81 — Brown-Séquard syndrome, G83.82 — Anterior cord syndrome, G83.83 — Posterior cord syndrome, G83.84 — Todd's paralysis (postepileptic), G83.89 — Other specified paralytic syndromes, +27 more

Same Index main term, other category

The ICD-10-CM Index to Diseases and Injuries files this code under the main terms “Paralysis, paralytic”, “Paresis”, “Palsy”; these codes share that main term but sit in a different category of the Tabular List.

G71.09 — Other specified muscular dystrophies (pseudohypertrophic), G72.3 — Periodic paralysis (periodic), G72.89 — Other specified myopathies (muscle, muscular NEC), G80.0 — Spastic quadriplegic cerebral palsy (cerebral, tetraplegic, spastic), G80.1 — Spastic diplegic cerebral palsy (spastic), G80.2 — Spastic hemiplegic cerebral palsy (cerebral, spastic, hemiplegic), G80.3 — Athetoid cerebral palsy (cerebral, athetoid), G80.4 — Ataxic cerebral palsy (cerebral, ataxic), G80.8 — Other cerebral palsy (cerebral, mixed), G80.9 — Cerebral palsy, unspecified (cerebral), G90.09 — Other idiopathic peripheral autonomic neuropathy (cervical, sympathetic), G90.89 — Other disorders of autonomic nervous system (sympathetic), G93.89 — Other specified disorders of brain (respiratory, center NEC), G95.89 — Other specified diseases of spinal cord (spinal, hereditary), H21.9 — Unspecified disorder of iris and ciliary body (muscle, muscular NEC, iris sphincter), H49.9 — Unspecified paralytic strabismus (ocular), H51.0 — Palsy (spasm) of conjugate gaze (gaze, conjugate), H51.8 — Other specified disorders of binocular movement (divergence), H52.52 — Paresis of accommodation (of accommodation), H57.09 — Other anomalies of pupillary function (iris), +96 more

Contextual Map

Every relationship of G83.9 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

Clinical classification (CCSR)

Risk adjustment (CMS-HCC)

  • HCC 254 — Monoplegia, Other Paralytic Syndromes [CMS-HCC]— CMS-HCC V28 · 2026

MS-DRG Grouper

MDC crossing

  • MDC 01 — Diseases and Disorders of the Nervous System[MDC crossing]: “Diseases and Disorders of the Nervous System — 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. 8,892 same-MDC procedures group here; browse them on the MDC page.”— CMS MS-DRG Definitions Manual · FY2026

Index entries (11)

  • Palsy[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • Paralysis, paralytic (complete) (incomplete)[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • Paralysis, paralytic (complete) (incomplete), brain[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • Paralysis, paralytic (complete) (incomplete), inferior nuclear[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • Paralysis, paralytic (complete) (incomplete), motor[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • Paralysis, paralytic (complete) (incomplete), senile[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • Paralysis, paralytic (complete) (incomplete), spastic[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • Paralysis, paralytic (complete) (incomplete), spinal (cord)[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • and 3 more

Nearest codes (28)

Change history

  • FY2016 — In the code set at ICD-10-CM adoption [Change history]— CMS release files (code change ledger) · icd10cm-fy2016

Sources for this page

Codes, titles, notes, index terms and mappings on this page are transcribed from the datasets below. Relationships MedCoder computed and text MedCoder wrote are labelled where they appear.

Code, title, tabular notes and index terms Official source data
CMS/CDC ICD-10-CM FY2026 tabular list, index and tables, effective October 1, 2025 Release, file and checksum · Publisher’s page
Claim edits Official source data
CMS Definitions of Medicare Code Edits — v43.1 (April 2026) Release, file and checksum · Publisher’s page
Inpatient payment groups Official source data
CMS MS-DRG Definitions Manual (incl. Appendix B diagnosis index, Appendix C CC/MCC list, Appendix E procedure index) and IPPS Final Rule tables — v43 Release, file and checksum · Publisher’s page
Risk adjustment Official source data
2026 Mid-Year Final ICD-10 Mappings + Model Software (cms.gov/files/zip/2026-midyear-final-icd-10-mappings.zip, 2026-midyear-final-model-software.zip) — CMS-HCC V28, PY2026 mid-year final release Release, file and checksum · Publisher’s page
Change history and date-of-service validity Official source data
CMS ICD-10-CM release addenda, ingested release by release into the change ledger Release, file and checksum · Publisher’s page
Comparisons, relationships and the contextual map MedCoder structured relationship
Computed by MedCoder from the tabular notes and tables above; every derived relationship is marked as derived where it appears
Summary and FAQ answers MedCoder explanation
Written by MedCoder to explain the sources above: drafted with AI assistance, checked by a person against the release files, and labelled as MedCoder text where it appears. Not official text.

Labels on this page: Official source data · MedCoder structured relationship · MedCoder explanation. How to read the labels · All data sources and release dates

Cite this page

Reference this page in a research guide, syllabus or article. The release is included because code content changes each year.

MedCoder.ai. "G83.9 — Paralytic syndrome, unspecified." ICD-10-CM FY2026. https://medcoder.ai/icd10/code/g83.9-paralytic-syndrome-unspecified

Change history

  • FY2016 — October 1, 2015
    In the code set at ICD-10-CM adoption
    Paralytic syndrome, unspecified

No changes since FY2016 — additions, deletions, description changes and billable-status changes are tracked through FY2027 (effective October 1, 2026), and none are recorded for this code. Note changes are tracked from FY2027 only.

Nearest Codes in This Family

Official ICD-10-CM classifications closest to G83.9 in its code family, with their registry titles.

View all codes in the G83 family