I60.9 — Nontraumatic subarachnoid hemorrhage, unspecified
I60.9 is a billable, specific ICD-10-CM code for nontraumatic subarachnoid hemorrhage, unspecified. It is valid for submission on a claim.
Excludes1 inherited from the categories above I60.9
These are not written on I60.9, but they bind it: a note on a category applies to every code beneath it. Billing I60.9 with anything listed here is a denial.
Excludes2 inherited from the categories above I60.9
Also inherited, and the opposite of Excludes1: these conditions are not part of I60.9, but a patient can have both, so you may code both.
Risk adjustment
I60.9 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:
- HCC 248 Intracranial Hemorrhage0.239 RAF
Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score.
Medicare coverage
I60.9 is named in 13 Medicare coverage policies — 13 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A52868Billing and Coding: Transesophageal Echocardiography (TEE)
- A56612Billing and Coding: CT of the Head
- A56631Billing and Coding: Thoracic Aortography and Carotid, Vertebral, and Subclavian Angiography
- A56722Billing and Coding: Intraoperative Neurophysiological Testing
How I60.9 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to I60.9.
- Hemorrhage, hemorrhagic›intracranial›subarachnoid(nontraumatic) (from)
Code history
I60.9 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.
Related codes at this level
Codes that share I60. If I60.9 is not quite right, the correct code is usually one of these.
- I60.0Nontraumatic subarachnoid hemorrhage from carotid siphon and bifurcation
- I60.1Nontraumatic subarachnoid hemorrhage from middle cerebral artery
- I60.2Nontraumatic subarachnoid hemorrhage from anterior communicating artery
- I60.3Nontraumatic subarachnoid hemorrhage from posterior communicating artery
- I60.4Nontraumatic subarachnoid hemorrhage from basilar artery
- I60.5Nontraumatic subarachnoid hemorrhage from vertebral artery
- I60.6Nontraumatic subarachnoid hemorrhage from other intracranial arteries
- I60.7Nontraumatic subarachnoid hemorrhage from unspecified intracranial artery
- I60.8Other nontraumatic subarachnoid hemorrhage
Questions about I60.9
- Is I60.9 a billable ICD-10-CM code?
- Yes. I60.9 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does I60.9 sit in the tabular list?
- Diseases of the circulatory system (I00-I99), in the block Cerebrovascular diseases (I60-I69).
- What cannot be coded together with I60.9?
- I60.9 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above I60.9 (I60) and apply to it just the same.