2027 ICD-10-CM Diagnosis Code I62.03Nontraumatic chronic subdural hemorrhage

ICD-10-CM Codes›I00–I99›I60-I69›I62

ICD-10-CM I62.03
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

I62.03 is a billable ICD-10-CM diagnosis code for nontraumatic chronic subdural hemorrhage. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 20 through 22, 64 through 66, 791, 793. As a secondary diagnosis, it counts as a major complication or comorbidity (MCC) and places an inpatient stay in the highest severity level of its MS-DRG family. It does not count, however, when the principal diagnosis is one of 306 closely related codes. Coders also document this condition as chronic intracranial subdural hematoma. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Acute hemorrhagic cerebrovascular disease.

For Medicare Advantage risk adjustment, I62.03 maps to CMS-HCC Category 248 (Intracranial Hemorrhage) under the V28 model, adding a risk factor of about 0.239 for a community, non-dual, aged beneficiary in payment year 2027.

Code Identity

ICD-10-CM Code
I62.03
Billable Status
Yes — Valid for Submission
Code Describes
Nontraumatic chronic subdural hemorrhage
Short Description
Nontraumatic chronic subdural hemorrhage
Same as the full description in the CMS dataset.
Parent Code
I62.0
Nontraumatic subdural hemorrhage

Code Classification

ChapterI00–I99Diseases of the circulatory system
SectionI60-I69Cerebrovascular diseases
CategoryI62Other and unspecified nontraumatic intracranial hemorrhage
This CodeI62.03Nontraumatic chronic subdural hemorrhage

Medicare Risk Adjustment (HCC)Billing

I62.03 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.

CMS-HCC V28 Category (Payment Model)
HCC 248— Intracranial Hemorrhage
Payment HCC · PY 2027 one of 53 ICD-10-CM codes in this category
Risk Adjustment Factor (RAF) Weight
+0.239
community, non-dual, aged · ranges 0.081–0.377 across segments
Hierarchy
Supersedes HCC 249
less severe related categories are not paid alongside HCC 248
Prior Model (CMS-HCC V24)
HCC 99
V24 retired V28 pays 100% of MA risk scores since PY 2026
Other CMS Models
PACE (CMS-HCC V22): HCC 99 · ESRD (V21): HCC 99 · ESRD (V24): HCC 99
ESRD V21 weights: 0.078 dialysis, 0.105–0.252 functioning graft · ESRD V24 weights: 0.062 dialysis, 0.082–0.438 functioning graft
Part D (RxHCC)
Not mapped
I62.03 does not risk-adjust in the RxHCC prescription drug model

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.

  • Chronic intracranial subdural hematoma
  • Chronic nontraumatic intracranial subdural hematoma
  • Chronic nontraumatic intracranial subdural hemorrhage
  • Dementia due to chronic intracranial subdural hematoma
  • Non-traumatic hematoma of subdural space of neuraxis
  • Nontraumatic intracranial subdural hematoma
  • Nontraumatic intracranial subdural hemorrhage

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to I62.03: its own notes plus those printed at I62, block I60-I69, and Chapter 9. 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.

From Block I60-I69 Cerebrovascular diseases applies to 410 codes
  • traumatic intracranial hemorrhage (S06.-)

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.

From I62 Other and unspecified nontraumatic intracranial hemorrhage applies to 6 codes
  • sequelae of intracranial hemorrhage (I69.2)
From Chapter 9 (I00-I99) Diseases of the circulatory system applies to 1,433 codes
  • 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)
  • systemic connective tissue disorders (M30-M36)
  • transient cerebral ischemic attacks and related syndromes (G45.-)

Use Additional Code

Add a second code, after this one, to fully describe the condition.

From I62 Other and unspecified nontraumatic intracranial hemorrhage applies to 6 codes
  • code, if known, to indicate National Institutes of Health Stroke Scale (NIHSS) score (R29.7-)
From Block I60-I69 Cerebrovascular diseases applies to 410 codes
  • code to identify presence of:
  • alcohol abuse and dependence (F10.-)
  • exposure to environmental tobacco smoke (Z77.22)
  • history of tobacco dependence (Z87.891)
  • hypertension (I10-I1A)
  • occupational exposure to environmental tobacco smoke (Z57.31)
  • tobacco dependence (F17.-)
  • tobacco use (Z72.0)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name I62.03, its category, or a range that includes it.

Code First 1

These codes say to code first a condition named in the note, and I62.03 is one of the conditions named.

  • R29.7 National Institutes of Health Stroke Scale (NIHSS) score
    the type of cerebral infarction (I60.-, I61.-, I62.-, I63.-) names I62.-, which includes this code

Code Also 2

These codes say I62.03 may also be needed to fully describe the condition. The note gives no sequencing direction.

  • G96.81 Intracranial hypotension
    Nontraumatic subdural hemorrhage (I62.0-) names I62.0-, which includes this code
  • I16.1 Hypertensive emergency
    cerebral hemorrhage (I60.-. I61.-, I62.-) names I62.-, which includes this code

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.

CCSR CIR021
Acute hemorrhagic cerebrovascular disease
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Hemorrhagic Stroke

A stroke happens when there is a loss of blood flow to part of the brain. Your brain cells cannot get the oxygen and nutrients they need from blood, and they start to die within a few minutes. This can cause lasting brain damage, long-term disability, or even death.

The full article covers:

  • What is a hemorrhagic stroke?
  • What are the types of hemorrhagic stroke?
  • What causes hemorrhagic stroke?
  • What are the symptoms of a hemorrhagic stroke?
  • How is a hemorrhagic stroke diagnosed?
  • How is hemorrhagic stroke treated?
  • Can a hemorrhagic stroke be prevented?

Read the full article at MedlinePlus

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

Convert I62.03 to ICD-9-CMHistory

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

ICD-9-CM
432.1 Subdural hemorrhage
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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About I62.03Overview

What is the ICD-10 code for nontraumatic chronic subdural hemorrhage?

The ICD-10-CM code for nontraumatic chronic subdural hemorrhage is I62.03 (sometimes written as I6203). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is I62.03 (Nontraumatic subdural hemorrhage) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report nontraumatic chronic subdural hemorrhage on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does I62.03 group to?

When nontraumatic chronic subdural hemorrhage is the principal diagnosis on an inpatient stay, it groups to MS-DRG 793, 791, 64, 22, 65, 21, 20, 66, with relative weights from 0.6770 to 7.9594 depending on complications. Higher weights mean higher Medicare reimbursement.

Is I62.03 a CC or MCC?

CMS lists I62.03 as an MCC (major complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it places the inpatient stay in the highest-weighted DRG of its severity family. It does not count when the principal diagnosis is one of the 306 closely related codes in its exclusion list.

Can I62.03 be reported with a code from S06?

Not as a rule. The Excludes1 note at block I60-I69, which applies to I62.03, lists "traumatic intracranial hemorrhage (S06.-)". 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 HCC is I62.03?

I62.03 (nontraumatic chronic subdural hemorrhage) maps to CMS-HCC Category 248 (Intracranial Hemorrhage), commonly written as HCC 248, in the CMS-HCC V28 model used for Medicare Advantage risk adjustment in payment year 2027. It mapped to HCC 99 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 I62.03 risk-adjust for Medicare Advantage payment?

Yes. When documented and reported on a Medicare Advantage encounter, I62.03 adds a risk adjustment factor of about 0.239 to the beneficiary's RAF score for a community, non-dual, aged enrollee (published V28 weights range from 0.081 to 0.377 depending on the payment segment). HCC 248 sits at the top of its hierarchy, so no other condition category supersedes it. See the full factor table on the HCC 248 category page.