scharge OASIS
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🏥 Hospital (<24hrs)→
Resume OASIS (ROC)→
🏠 Discharge OASIS
↑ This whole cycle is within 60 days of SOC
⚠️ OT (Occupational Therapist) cannot fill the OASIS. Only SN, ST/SLP, and PT can fill OASIS.
🔤 ICD-10-CM A to Z — Complete Chapter Guide
Every ICD-10-CM code starts with a letter that tells you the category. Memorise this A-Z map — it is the foundation of coding speed.
A–B
Infection codes
Cellulitis, UTI, sepsis, HIV (B20), wound infections
C
Malignant neoplasm — cancer
Primary cancer, secondary cancer, metastasis
D
Benign neoplasm + blood conditions
D63 anaemia with malignancy, D64 drug-induced anaemia
E
Endocrine conditions
Diabetes (E08–E13), thyroid, adrenal, vitamin deficiency, hyperlipidaemia
F
Psychological / mental health
Dementia (F01–F03), depression, anxiety, substance use
G
Nervous system + pain management
Neuropathy, Parkinson's, MS, pain — G89
H
Eye and ear diseases
Post-cataract, glaucoma, hearing loss, vertigo
I
Circulatory system
HTN (I10), CHF, CAD, CVA/stroke, MI — very common in HH
J
Respiratory system
COPD (J44), pneumonia (J18), asthma, respiratory failure
K
Gastrointestinal system
GERD, colostomy care, Crohn's, bowel obstruction
L
Skin and tissue
Pressure ulcers (L89), cellulitis, non-pressure ulcers (L97)
M
Musculoskeletal
Arthritis, fracture aftercare, back pain, osteoporosis — very common HH
N
Genitourinary
UTI, CKD (N18), urinary incontinence, nephropathy
O
Pregnancy codes
Complications, childbirth, puerperal — OB codes
P
Newborn conditions
Neonatal sepsis (P36), prematurity, newborn conditions
Q
Congenital malformations
Genetic problems, birth defects
R
Signs and symptoms
Use when no definitive diagnosis — R52 pain, SOB, weakness
S
Traumatic fractures + injuries
Require 7th character: A=initial, D=subsequent, S=sequela
T
Poisoning, adverse effect, underdose
Drug-induced conditions, overdose, underdose, adverse effect
U
COVID-19
U07.1 COVID confirmed, U07.2 COVID unconfirmed
V–Y
External cause codes
Cause of injury — falls, accidents, place of occurrence, abuse
Z
Encounter, history, status codes
Aftercare (Z48), long-term meds (Z79), history codes, artificial joints (Z96)
💡 Home Health most common chapters: I (circulatory), M (musculoskeletal), E (endocrine/DM), G (nervous), L (skin/wounds), Z (aftercare/status)
📖 ICD-10-CM Conventions — Rules Every Coder Must Know
Abbreviations
**NEC — No