ICD-10 Code for Noncompliance
The ICD-10-CM code for noncompliance is Z91.199 — Patient's noncompliance with other medical treatment and regimen due to unspecified reason. This is the code the Alphabetic Index gives for noncompliance with no further qualifier, valid for FY2027 (October 1, 2026 – September 30, 2027).
BillableUnspecified
Z91.199 is billable but unspecified. If the documentation names a type, site or cause, one of the more specific codes below is likely expected.
Which noncompliance code should you use?
The Alphabetic Index lists 25 codes under Noncompliance. Which one applies depends on the qualifier documented in the record — the type, site, cause, or associated condition. Find the qualifier below, then verify the code in the Tabular List before using it.
Noncompliance with
| dietary regimen | Z91.119 | Patient's noncompliance with dietary regimen due to unspecified reason | |
| dialysis | Z91.158 | Patient's noncompliance with renal dialysis for other reason | |
| medical treatment, specified NEC | Z91.199 | Patient's noncompliance with other medical treatment and regimen due to unspecified reason | |
| medication regimen NEC | Z91.148 | Patient's other noncompliance with medication regimen for other reason | |
| renal dialysis | Z91.158 | Patient's noncompliance with renal dialysis for other reason | |
| dialysis › due to financial hardship | Z91.151 | Patient's noncompliance with renal dialysis due to financial hardship | |
| medication regimen NEC › due to financial hardship | Z91.141 | Patient's other noncompliance with medication regimen due to financial hardship | |
| medication regimen NEC › underdosing | Z91.148 | Patient's other noncompliance with medication regimen for other reason | |
| renal dialysis › due to financial hardship | Z91.151 | Patient's noncompliance with renal dialysis due to financial hardship | |
| dietary regimen › due to › financial hardship | Z91.110 | Patient's noncompliance with dietary regimen due to financial hardship | |
| dietary regimen › due to › specified reason NEC | Z91.118 | Patient's noncompliance with dietary regimen for other reason | |
| medical treatment, specified NEC › due to › financial hardship | Z91.190 | Patient's noncompliance with other medical treatment and regimen due to financial hardship | |
| medical treatment, specified NEC › due to › specified reason NEC | Z91.198 | Patient's noncompliance with other medical treatment and regimen for other reason | |
| medication regimen NEC › underdosing › intentional NEC | Z91.128 | Patient's intentional underdosing of medication regimen for other reason | |
| medication regimen NEC › underdosing › unintentional NEC | Z91.138 | Patient's unintentional underdosing of medication regimen for other reason | |
| medication regimen NEC › underdosing › intentional NEC › due to financial hardship of patient | Z91.120 | Patient's intentional underdosing of medication regimen due to financial hardship | |
| medication regimen NEC › underdosing › unintentional NEC › by caregiver | Z91.A3 | Caregiver's unintentional underdosing of patient's medication regimen | |
| medication regimen NEC › underdosing › unintentional NEC › due to patient's age related debility | Z91.130 | Patient's unintentional underdosing of medication regimen due to age-related debility | |
| medication regimen NEC › underdosing › intentional NEC › by caregiver › due to › financial hardship | Z91.A20 | Caregiver's intentional underdosing of patient's medication regimen due to financial hardship | |
| medication regimen NEC › underdosing › intentional NEC › by caregiver › due to › specified reason NEC | Z91.A28 | Caregiver's intentional underdosing of medication regimen for other reason |
Noncompliance caregiver
| with patient's › medical treatment and regimen › due to financial hardship | Z91.A91 | Caregiver's noncompliance with patient's other medical treatment and regimen due to financial hardship | |
| with patient's › medical treatment and regimen › specified reason NEC | Z91.A98 | Caregiver's noncompliance with patient's other medical treatment and regimen for other reason | |
| with patient's › medication regimen › due to financial hardship | Z91.A41 | Caregiver's other noncompliance with patient's medication regimen due to financial hardship | |
| with patient's › medication regimen › specified reason NEC | Z91.A48 | Caregiver's other noncompliance with patient's medication regimen for other reason | |
| with patient's › renal dialysis › due to financial hardship | Z91.A51 | Caregiver's noncompliance with patient's renal dialysis due to financial hardship | |
| with patient's › renal dialysis › specified reason NEC | Z91.A58 | Caregiver's noncompliance with patient's renal dialysis for other reason | |
| with patient's › dietary regimen › due to › financial hardship | Z91.A10 | Caregiver's noncompliance with patient's dietary regimen due to financial hardship | |
| with patient's › dietary regimen › due to › specified reason NEC | Z91.A18 | Caregiver's noncompliance with patient's dietary regimen for other reason |
Index terms and codes are reproduced from the official ICD-10-CM FY2027 release. The Alphabetic Index is a finding aid — a code must always be verified in the Tabular List before it is reported. Data sources