Open Nursing Core FHIR Implementation Guide (ONC-IG)
0.1.0 - draft

Open Nursing Core FHIR Implementation Guide (ONC-IG) - Local Development build (v0.1.0) built by the FHIR (HL7® FHIR® Standard) Build Tools. See the Directory of published versions

CodeSystem: ONC Observation Codes

Official URL: https://clinyqai.github.io/open-nursing-core-ig/CodeSystem/onc-observation-codes Version: 0.1.0
Draft as of 2026-01-01 Computable Name: ONCObservationCodes

Custom observation codes for Open Nursing Core

This Code system is referenced in the content logical definition of the following value sets:

This code system https://clinyqai.github.io/open-nursing-core-ig/CodeSystem/onc-observation-codes defines the following codes:

CodeDisplayDefinition
mst-score Monk Skin Tone Score Assessment of skin tone using the Monk Skin Tone Scale
waterlow-score Waterlow Score Total score for Waterlow pressure ulcer risk assessment
must-score MUST Score Malnutrition Universal Screening Tool total score
must-bmi-score MUST BMI Score Malnutrition Universal Screening Tool BMI score
must-weight-loss-score MUST Weight Loss Score Malnutrition Universal Screening Tool weight loss score
must-acute-disease-score MUST Acute Disease Score Malnutrition Universal Screening Tool acute disease effect score
braden-total-score Braden Total Score Braden scale total score
braden-sensory Braden Sensory Perception Sensory perception Braden scale
braden-moisture Braden Moisture Moisture Braden scale
braden-activity Braden Activity Activity Braden scale
braden-mobility Braden Mobility Mobility Braden scale
braden-nutrition Braden Nutrition Nutrition Braden scale
braden-friction Braden Friction/Shear Friction and shear Braden scale
barthel-score Barthel Index Score Total score for Barthel Index assessment
news2-score NEWS2 Score National Early Warning Score 2 Total Score
news2-subscore NEWS2 Sub-score Sub-score for NEWS2 parameter
wound-stage Wound Stage Stage of the wound
stage-1 Stage 1 Stage 1 pressure ulcer
stage-2 Stage 2 Stage 2 pressure ulcer
stage-3 Stage 3 Stage 3 pressure ulcer
stage-4 Stage 4 Stage 4 pressure ulcer
unstageable Unstageable Unstageable pressure ulcer
deep-tissue Deep Tissue Injury Deep tissue injury
risk-falls Risk of Falls Risk of falls diagnosis
fitzpatrick-1 Type I Pale white; always burns, never tans
fitzpatrick-2 Type II White; usually burns, tans with difficulty
fitzpatrick-3 Type III Cream white; sometimes mild burn, gradually tans
fitzpatrick-4 Type IV Moderate brown; rarely burns, tans with ease
fitzpatrick-5 Type V Dark brown; very rarely burns, tans very easily
fitzpatrick-6 Type VI Deeply pigmented dark brown to black; never burns, tans very easily
what-matters What Matters to Me Patient-identified priorities and non-clinical goals
patient-story Patient Story Narrative summary of patient background, preferences, and autobiography
relational-engagement Relational Engagement Score Assessment of the quality of nurse-patient engagement (1-5)
cfs-score Clinical Frailty Scale Score Total score for Rockwood Clinical Frailty Scale
cfs-1 Very Fit Robus, active, energetic and motivated
cfs-2 Well No active disease symptoms but less fit than category 1
cfs-3 Managing Well Medical problems are well controlled, but not regularly active
cfs-4 Vulnerable Not dependent for daily help, but symptoms limit activities
cfs-5 Mildly Frail Need help with high order IADLs (finances, transportation, heavy housework)
cfs-6 Moderately Frail Need help with all outside activities and some housekeeping
cfs-7 Severely Frail Completely dependent for personal care
cfs-8 Very Severely Frail Completely dependent, approaching end of life
cfs-9 Terminally Ill Approaching the end of life (life expectancy <6 months)
4at-score 4AT Delirium Score Total score for 4AT assessment
4at-alertness Alertness 4AT Item 1: Alertness
4at-amt4 AMT4 Score 4AT Item 2: Abbreviated Mental Test 4
4at-attention Attention 4AT Item 3: Attention (Months Backwards)
4at-acute-change Acute Change 4AT Item 4: Acute Change or Fluctuating Course
reasonable-adjustment Reasonable Adjustment Requirement for adjustment to care delivery (Equality Act)
mca-assessment Mental Capacity Assessment Assessment of capacity to make a specific decision
capacity-present Capacity Present Patient has capacity for this decision
capacity-absent Capacity Absent Patient lacks capacity for this decision
best-interest Best Interest Decision Decision made in patient's best interest
bristol-score Bristol Stool Score Bristol Stool Form Scale Score (1-7)
bristol-1 Type 1 Separate hard lumps, like nuts (hard to pass)
bristol-2 Type 2 Sausage-shaped but lumpy
bristol-3 Type 3 Like a sausage but with cracks on its surface
bristol-4 Type 4 Like a sausage or snake, smooth and soft
bristol-5 Type 5 Soft blobs with clear-cut edges (passed easily)
bristol-6 Type 6 Fluffy pieces with ragged edges, a mushy stool
bristol-7 Type 7 Watery, no solid pieces. Entirely liquid
abbey-score Abbey Pain Scale Score Total Abbey Pain Scale Score (0-100+ but usually 0-18+)
abbey-vocalization Vocalization Whimpering, groaning, crying
abbey-facial-expression Facial Expression Looking tense, frowning, grimacing, looking frightened
abbey-body-language Body Language Fidgeting, rocking, guarding part of body, withdrawn
abbey-behavioral-change Behavioral Change Increased confusion, refusing to eat, alteration in usual pattern
abbey-psychological-change Psychological Change Temperature, pulse, blood pressure changes, perspiration, pallor
abbey-physical-changes Physical Changes Skin tears, pressure areas, arthritis, contractures, previous injuries
fluid-input-total Total Fluid Input Total fluid input over specified period (e.g. 24h)
fluid-output-total Total Fluid Output Total fluid output over specified period (e.g. 24h)
fluid-balance Fluid Balance Total Input minus Total Output
urine-output Urine Output Volume of urine passed
abc-chart ABC Chart Antecedent-Behaviour-Consequence Chart for PBS
abc-antecedent Antecedent What happened immediately before the behaviour (triggers)
abc-behaviour Behaviour Description of the behaviour itself (observable actions)
abc-consequence Consequence What happened immediately after (response/outcome)
abc-function Function of Behaviour Hypothesized function (e.g. Sensory, Escape, Attention, Tangible)
abc-duration Duration Duration of the episode
abc-intensity Intensity Intensity of the behaviour (1-10)
oral-health-score Oral Health Score Total Oral Health Assessment Score
oral-lips Lips Condition of lips (Pink/Moist vs Dry/Cracked)
oral-tongue Tongue Condition of tongue (Pink/Moist vs Coated/Red)
oral-gums Gums Condition of gums (Pink/Firm vs Bleeding/Receding)
oral-teeth Teeth/Dentures Condition of teeth or dentures (Clean/Intact vs Decayed/Broken/Loose)
oral-saliva Saliva Saliva quality (Moist/Watery vs Thick/Sticky/Absent)
seizure-record Seizure Record Record of a seizure event
seizure-type Seizure Type Type of seizure (Tonic-Clonic, Absence, Focal, etc)
seizure-duration Seizure Duration Duration of the active seizure phase
seizure-recovery Recovery Phase Duration/Description of post-ictal recovery
seizure-trigger Trigger Suspected trigger for the seizure
sleep-record Sleep Record Record of a sleep period
sleep-quality Sleep Quality Subjective or observed quality of sleep
sleep-hours Hours Slept Total hours of sleep achieved
sleep-disturbances Disturbances Number or description of distinct awakenings
urinalysis-panel Urinalysis Panel Urine Dipstick Test Panel
ua-leukocytes Leukocytes Leukocytes (WBCs) in urine
ua-nitrites Nitrites Nitrites in urine
ua-protein Protein Protein in urine
ua-blood Blood Blood (Hemoglobin) in urine
ua-glucose Glucose Glucose in urine
ua-ketones Ketones Ketones in urine
ua-ph pH Urine pH Level
ua-sg Specific Gravity Urine Specific Gravity
mca-present Capacity Present Patient has capacity for this decision
4at-change-no No Acute Change No indication of acute change or fluctuating course
4at-amt4-1error 1 Error 1 error in AMT4 test
4at-attention-gt7 Months Backwards < 7 months Less than 7 months correctly recited backwards
4at-alert-normal Normal Alertness Patient is fully alert