Z91.19

Patient's noncompliance with other medical treatment and regimen

Z91.19 is a clinical coding descriptor for patients who do not adhere to prescribed medical interventions, excluding medication therapy. This specific code encompasses failure to follow non-pharmacological instructions such as dietary restrictions, physical therapy, recommended exercise programs, wound care protocols, and lifestyle modifications (e.g., smoking cessation or alcohol reduction). It also covers missed follow-up appointments and the refusal of diagnostic or surgical procedures. Documenting this noncompliance is critical for risk adjustment and clinical decision-making, as it identifies behavioral or social barriers that may explain poor treatment outcomes or disease progression despite a sound medical plan.

Clinical Symptoms

Worsening of chronic disease markers (e.g., uncontrolled hypertension or rising HbA1c)
Frequent and preventable hospital readmissions
Missed clinic or outpatient rehabilitation appointments
Inability to achieve established therapeutic goals
Failure to follow post-operative instructions
Slow wound healing or recurrent localized infections
Patient self-report of non-adherence to dietary or lifestyle modifications
Physical signs of non-use of medical devices (e.g., unused CPAP filters, pristine compression stockings)
Lack of progress in physical or occupational therapy due to missed sessions

Common Causes

Health literacy deficits (misunderstanding the complexity or necessity of the regimen)
Cognitive impairment, including dementia or executive dysfunction
Psychological factors, such as depression, anxiety, or denial of illness
Socioeconomic barriers, including lack of affordable transportation or financial constraints
Cultural or religious beliefs that conflict with the medical recommendations
Lack of a social support system or caregiver assistance
Physical limitations that prevent adherence to exercise or therapy regimens
Patient-provider relationship issues, including perceived lack of empathy or poor communication
Logistical challenges, such as conflicting work schedules or child care responsibilities

Documentation & Coding Tips

Distinguish between medication noncompliance and other medical treatment noncompliance to ensure specific coding.

Example: The patient with stage 4 chronic kidney disease (N18.4) has failed to attend three consecutive dialysis sessions due to transportation issues (Z59.48). This noncompliance with the prescribed dialysis regimen is documented to support the medical necessity of social work intervention and risk adjustment for complications associated with missed treatments.

Billing Focus: Documentation should explicitly state the specific medical treatment being neglected, such as dialysis, physical therapy, or wound care, to support higher-level E/M complexity.

Document the underlying reason for noncompliance, including social determinants of health or physiological side effects.

Example: A patient with essential hypertension (I10) reports discontinuing their prescribed salt-restricted diet and exercise program. The patient states they cannot afford fresh produce (Z59.6) and experience significant knee pain (M17.11) when walking. This explains the noncompliance with the therapeutic regimen Z91.19.

Billing Focus: Identifying the reason for noncompliance allows for the use of secondary Z-codes (SDOH), which provide a more comprehensive picture of the patient's medical complexity.

Specify whether the noncompliance is intentional or unintentional to guide clinical management and coding accuracy.

Example: Patient with type 2 diabetes mellitus (E11.9) demonstrates unintentional noncompliance with their glucose monitoring schedule due to early-stage vascular dementia (F01.50). The patient frequently forgets to check levels and record results, requiring caregiver intervention.

Billing Focus: Specifying the intentionality helps justify time spent on counseling (99214) or the need for behavioral health referrals.

Detail the clinical consequences or complications resulting from the noncompliance.

Example: Patient with history of pulmonary embolism (I26.99) stopped using compression stockings as prescribed for post-thrombotic syndrome. Consequently, the patient presents with increased lower extremity edema and a new venous stasis ulcer of the right calf (L97.219). Noncompliance with medical regimen Z91.19 is noted as a primary factor in disease progression.

Billing Focus: Documenting the resulting complication (ulcer) justifies the medical decision-making complexity for the encounter.

Record the counseling or education provided to the patient to mitigate noncompliance.

Example: Spent 35 minutes (99214) counseling a patient with persistent asthma (J45.40) who is noncompliant with their environmental trigger avoidance plan. Discussed the clinical necessity of using HEPA filters and avoiding tobacco smoke. Patient expressed understanding but cited financial constraints for home modifications.

Billing Focus: Time-based billing requires a specific statement of the total time spent and a summary of the counseling provided.

Relevant CPT Codes

99213 - Office or other outpatient visit for the evaluation and management of an established patient, which requires a Low level of medical decision making. When using time for code selection, 20-29 minutes of total time is spent on the date of the encounter.
Used for routine monitoring of chronic conditions where noncompliance is a minor element of the low-complexity decision-making.
99214 - Office or other outpatient visit for the evaluation and management of an established patient, which requires a Moderate level of medical decision making. When using time for code selection, 30-39 minutes of total time is spent on the date of the encounter.
Appropriate when the provider must adjust treatment plans or perform extensive counseling due to the patient's noncompliance.
99490 - Chronic care management services, at least 20 minutes of clinical staff time directed by a physician or other qualified health care professional, per calendar month.
Clinical staff often spend time addressing barriers to adherence and tracking compliance as part of CCM.
96156 - Health behavior assessment, or re-assessment (e.g., health-focused clinical interview, behavioral observations, clinical decision making).
Used to identify the psychological or behavioral reasons why a patient is not following a medical regimen.
98960 - Education and training for patient self-management by a qualified, nonphysician health care professional using a standardized curriculum, face-to-face with the patient; 1 patient.
Standardized education is often used to remedy noncompliance by improving patient understanding of their regimen.
99401 - Preventive medicine counseling and/or risk factor reduction intervention(s) provided to an individual (separate procedure); approximately 15 minutes.
Direct intervention focused on changing behaviors that lead to medical noncompliance.
99487 - Complex chronic care management services, with the following required elements: 60 minutes of clinical staff time directed by a physician or other qualified health care professional, per calendar month.
Noncompliance in complex patients often necessitates the high-intensity coordination provided in this code.
90837 - Psychotherapy, 60 minutes with patient and/or family member.
Deep-seated behavioral issues causing medical noncompliance may require formal psychotherapy.
99421 - Online digital evaluation and management service, for an established patient, for up to 7 days, cumulative time during the 7 days; 5-10 minutes.
Providers use portal messages to monitor compliance with treatment plans between visits.
99091 - Collection and interpretation of physiologic data (e.g., ECG, blood pressure, glucose monitoring) digitally stored and/or transmitted by the patient and/or caregiver to the physician.
Used to identify noncompliance through data (e.g., realizing a patient isn't checking their blood sugar).