Summary & Overview
HCPCS J0636: Calcitriol Injection, 0.1 mcg
HCPCS Level II code J0636 denotes a 0.1 mcg injection of calcitriol, an active vitamin D analog used in managing hypocalcemia and disorders of mineral metabolism. Nationally, injectable calcitriol is clinically important for patients with chronic kidney disease, certain hypoparathyroidism cases, and other conditions requiring active vitamin D supplementation when oral therapy is inadequate or not tolerated. Accurate coding of parenteral calcitriol affects clinical billing, inventory management, and specialty pharmacy workflows.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. The publication provides a consolidated view of coverage and billing considerations across these major payers.
Readers will find concise benchmarks and contextual information on typical sites of service, common clinical indications tied to parenteral calcitriol use, and the administrative elements that influence claim processing. The content also summarizes how this code is used in outpatient infusion settings and physician offices, and outlines where supplemental documentation or policy review may be relevant. Data not available in the input is noted where applicable.
Billing Code Overview
HCPCS Level II code J0636 describes an injection of calcitriol, 0.1 mcg. This code represents a single-dose parenteral administration of calcitriol, the active form of vitamin D, typically used in clinical settings to manage hypocalcemia and certain disorders of mineral metabolism.
Service Type: Injection / Parenteral Drug Administration
Typical Site of Service: Hospital outpatient departments, physician offices, and infusion centers
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Clinical & Coding Specifications
Clinical Context
A typical patient is an adult with chronic kidney disease or hypocalcemia requiring parenteral active vitamin D replacement. The patient presents to an outpatient infusion clinic or physician office for administration of J0636 (injection, calcitriol, 0.1 mcg). The clinical workflow includes pre-visit medication reconciliation and assessment of serum calcium, phosphorus, and parathyroid hormone levels; confirmation of indication and dose; verification of allergy status; informed consent for injection; preparation of the medication by licensed staff; administration via intramuscular or subcutaneous injection per local protocol; post‑injection observation for immediate adverse reactions; documentation of lot number, dose, route, site, and provider; and coding/billing using J0636 with applicable modifiers and the patient’s primary ICD-10 diagnosis. Typical sites of service are an outpatient infusion center, hospital outpatient clinic, or physician office. Common clinical scenarios include management of renal osteodystrophy in end-stage renal disease, persistent symptomatic hypocalcemia when oral calcitriol is not feasible, or perioperative calcium management in select endocrine cases.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
11 | Normal, expected service | When the injection is provided as planned without unusual circumstances |