BCHHC Advanced — Complex Coding Scenarios

HTN Combination Codes

Never code I10 (HTN alone) when combination codes exist:

Combination	Code

|------------|------|

HTN + HF only	I11.0
HTN + CKD stages 1–4	I12.9
HTN + CKD stage 5/ESRD	I12.0
HTN + HF + CKD stages 1–4	I13.0
HTN + HF + ESRD	I13.11

Full Complex Scenario

Patient with CHF monitoring + T2DM on insulin + CKD stage 3 + anemia of CKD:

I13.0   Hypertensive heart and CKD with HF, CKD stages 1–4
I50.22  Chronic systolic heart failure
E11.22  T2DM with diabetic CKD
N18.3   CKD stage 3
D63.1   Anemia in CKD
Z79.4   Long-term insulin use

CVA / Stroke in Home Health

Rule: Acute CVA (I60–I63) is NEVER coded in home health. Always code sequela:

Residual	Code

|---------|------|

Hemiplegia, right non-dominant	I69.351
Hemiplegia, left non-dominant	I69.354
Aphasia following cerebral infarction	I69.320
Dysphagia following cerebral infarction	I69.391

Default to non-dominant if dominance not documented.

Wound Coding — 7th Character Rules

7th Character	When to Use	Example

|-------------|------------|---------|

A (Initial)	Active treatment: wound VAC, antibiotics active	Wound VAC in place
D (Subsequent)	Routine healing, dressing changes only	No active treatment
S (Sequela)	Late effect after acute phase resolves	Contracture from old burn

Key rule: Wound VAC presence = active treatment = A, even if wound is healing.

Pressure Ulcer vs Non-Pressure Chronic Ulcer

Code	Type	Trigger

|------|------|---------|

L89.x	Pressure ulcer	Bony prominence, sustained pressure
L97.x	Non-pressure chronic ulcer (lower limb)	Diabetic foot, venous stasis, arterial
T81.x	Post-procedural wound	Surgical wound complications

Diabetes — Specificity Requirements

Always code to highest specificity — DO NOT use E11.9 (unspecified) when complications documented:

Condition	Code

|----------|------|

T2DM with CKD	E11.22
T2DM with foot ulcer	E11.621
T2DM with retinopathy, unspecified	E11.319
T2DM with neuropathy, unspecified	E11.40
T2DM with hyperglycemia	E11.65
Insulin use (T2DM)	Z79.4

A and B Codes in Infection Coding

•A codes: bacterial and parasitic infections (Chapter 1)

•B codes: viral and other organism infections

•When organism identified: code primary infection + B code for organism

•Example: B96.89 (other specified bacterial agents) as additional code for organism identification

BCHHC Certification Prep — Advanced