| Z91 | Personal risk factors, not elsewhere classified | NON-BILLABLE CODE |
| Z91.0 | Allergy status, other than to drugs and biological substances | NON-BILLABLE CODE |
| Z91.01 | Food allergy status | NON-BILLABLE CODE |
| Z91.010 | Allergy to peanuts | BILLABLE CODE |
| Z91.011 | Allergy to milk products | BILLABLE CODE |
| Z91.012 | Allergy to eggs | BILLABLE CODE |
| Z91.013 | Allergy to seafood | BILLABLE CODE |
| Z91.014 | Allergy to mammalian meats | BILLABLE CODE |
| Z91.018 | Allergy to other foods | BILLABLE CODE |
| Z91.02 | Food additives allergy status | BILLABLE CODE |
| Z91.03 | Insect allergy status | NON-BILLABLE CODE |
| Z91.030 | Bee allergy status | BILLABLE CODE |
| Z91.038 | Other insect allergy status | BILLABLE CODE |
| Z91.04 | Nonmedicinal substance allergy status | NON-BILLABLE CODE |
| Z91.040 | Latex allergy status | BILLABLE CODE |
| Z91.041 | Radiographic dye allergy status | BILLABLE CODE |
| Z91.048 | Other nonmedicinal substance allergy status | BILLABLE CODE |
| Z91.1 | Patient's noncompliance with medical treatment and regimen | NON-BILLABLE CODE |
| Z91.11 | Patient's noncompliance with dietary regimen | BILLABLE CODE |
| Z91.12 | Patient's intentional underdosing of medication regimen | NON-BILLABLE CODE |
| Z91.120 | Patient's intentional underdosing of medication regimen due to financial hardship | BILLABLE CODE |
| Z91.128 | Patient's intentional underdosing of medication regimen for other reason | BILLABLE CODE |
| Z91.13 | Patient's unintentional underdosing of medication regimen | NON-BILLABLE CODE |
| Z91.130 | Patient's unintentional underdosing of medication regimen due to age-related debility | BILLABLE CODE |
| Z91.138 | Patient's unintentional underdosing of medication regimen for other reason | BILLABLE CODE |
| Z91.14 | Patient's other noncompliance with medication regimen | BILLABLE CODE |
| Z91.15 | Patient's noncompliance with renal dialysis | BILLABLE CODE |
| Z91.19 | Patient's noncompliance with other medical treatment and regimen | BILLABLE CODE |
| Z91.4 | Personal history of psychological trauma, not elsewhere classified | NON-BILLABLE CODE |
| Z91.41 | Personal history of adult abuse | NON-BILLABLE CODE |
| Z91.410 | Personal history of adult physical and sexual abuse | BILLABLE CODE |
| Z91.411 | Personal history of adult psychological abuse | BILLABLE CODE |
| Z91.412 | Personal history of adult neglect | BILLABLE CODE |
| Z91.419 | Personal history of unspecified adult abuse | BILLABLE CODE |
| Z91.42 | Personal history of forced labor or sexual exploitation | BILLABLE CODE |
| Z91.49 | Other personal history of psychological trauma, not elsewhere classified | BILLABLE CODE |
| Z91.5 | Personal history of self-harm | NON-BILLABLE CODE |
| Z91.51 | Personal history of suicidal behavior | BILLABLE CODE |
| Z91.52 | Personal history of nonsuicidal self-harm | BILLABLE CODE |
| Z91.8 | Other specified personal risk factors, not elsewhere classified | NON-BILLABLE CODE |
| Z91.81 | History of falling | BILLABLE CODE |
| Z91.82 | Personal history of military deployment | BILLABLE CODE |
| Z91.83 | Wandering in diseases classified elsewhere | BILLABLE CODE |
| Z91.84 | Oral health risk factors | NON-BILLABLE CODE |
| Z91.841 | Risk for dental caries, low | BILLABLE CODE |
| Z91.842 | Risk for dental caries, moderate | BILLABLE CODE |
| Z91.843 | Risk for dental caries, high | BILLABLE CODE |
| Z91.849 | Unspecified risk for dental caries | BILLABLE CODE |
| Z91.89 | Other specified personal risk factors, not elsewhere classified | BILLABLE CODE |
