Hypotension is classified under ICD-10-CM code I95, which requires specifying the cause or type. Common billable codes include I95.1 (orthostatic), I95.2 (due to drugs), I95.81 (postprocedural), and I95.9 (unspecified).
Primary codes
Billable
Billable
Extension
—
7th character
—
POA exempt
No
Coding risks
- Assigning when documentation supports a more specific code
Hierarchy
Code comparison
Compare key differences between related codes to select the most specific option.
| Code | Description | Scenario |
|---|---|---|
| I95.9 | Hypotension, unspecified | Hypotension documented without a specified cause, positional trigger, drug link, or procedural context. |
| I95.1 | Orthostatic hypotension | Hypotension documented on standing or positional change, without a drug or procedural cause noted. |
| I95.2 | Hypotension due to drugs | Hypotension attributed to a medication, with the causative drug identified in documentation. |
| I95.81 | Postprocedural hypotension | Hypotension occurring after a surgical or invasive procedure, causally linked to the procedure itself. |
Select the most specific code supported by the encounter documentation. More specific codes improve reimbursement accuracy and reduce audit risk.
Code ranges
Hypotension
Category covering idiopathic, orthostatic, drug-induced, and other specified forms of chronically or acutely low blood pressure.
Other and unspecified disorders of the circulatory system
Residual sub-chapter for circulatory conditions not classified within ischemic, hypertensive, cerebrovascular, or other specific circulatory blocks.
Hypertensive diseases
Sub-chapter for elevated blood pressure conditions including essential hypertension and hypertensive heart, kidney, and combined disease.
Abnormal blood-pressure reading, without diagnosis
Symptom codes for isolated non-specific low or high blood pressure readings without an established underlying diagnosis of hypotension or hypertension.
Shock due to anesthesia
Injury-chapter code for shock occurring as a complication of anesthesia administration, classified separately from circulatory-chapter hypotension.
Coding risks
Avoid these common coding issues when reporting Hypotension.
Impact
Assigning I95.9 without explicit subtype may miscode orthostatic or drug-induced cases as unspecified hypotension.
Mitigation
Consider querying the provider when subtype is absent rather than inferring from medication lists or positional symptoms.
Related codes
Ancillary and co-coding
Codes commonly reported with the primary diagnosis on the same claim.
In pregnancy
Pregnancy-specific O-code adaptations used in place of the primary when the condition occurs during or complicates pregnancy.
Differential codes
Alternative or commonly confused codes to consider when documentation suggests a different condition than the primary diagnosis.
Frequently asked questions
Use I95.9 only when documentation lacks a specified type. If orthostatic, drug-induced, or postprocedural hypotension is documented, assign the specific I95 subcode.
References
Compiled from the following authoritative coding references. Last updated 2026-08-04.