Critical Care Billing Services

Critical care billing is built on time and medical necessity. A physician must document how many minutes were spent on direct care of a patient with a life-threatening condition, and the note has to show why that care was needed. When time is missing, or the patient did not meet the critical illness standard, payers often downgrade the claim to a regular visit.

Intensivist groups also deal with shared coverage, teaching rules, and procedures that may or may not be billed on top of critical care. Westmont Revenue Partners connects ICU practices with vetted critical care billing experts who understand these rules and can keep claims clean from the first submission.

Who this is for

• Intensivists and pulmonary/critical care physicians
• Hospital-based ICU groups and tele-ICU programs
• Nurse practitioners and physician assistants working in intensive care units
• Small and mid-size physician groups that staff medical, surgical, or cardiac ICUs
• Practices that cover multiple hospitals with different documentation systems

What gets billed

• Initial and ongoing critical care by time
• Initial hospital care for patients admitted to the ICU
• Subsequent hospital care when a visit does not meet critical care rules
• Neonatal and pediatric critical care for eligible patients
• Ventilator management and airway support
• Central line placement and other bedside procedures
• Arterial line placement and monitoring
• Cardiopulmonary resuscitation and related emergency services
• Family meetings tied to treatment decisions
• Consultations requested by other physicians

Commonly billed codes

Code	Type	What it covers
99291	CPT	First block of critical care time, usually the first 30 to 74 minutes in a day
99292	CPT	Each added block of critical care time after the first
99223	CPT	Initial hospital admission visit with high-complexity decision making
99232	CPT	Follow-up hospital visit with moderate-complexity decision making
99233	CPT	Follow-up hospital visit with high-complexity decision making
99468	CPT	First-day critical care for a newborn 28 days old or younger
J96.01	ICD-10-CM	Acute respiratory failure with low oxygen
R65.21	ICD-10-CM	Severe sepsis with septic shock
A41.9	ICD-10-CM	Sepsis with no organism specified

Note

Codes are examples for orientation, not a complete list, and do not guarantee coverage or payment. Always check current code sets and payer policy.

Billing challenges in critical care

Time documentation. Critical care is paid by time, and the time must be clearly stated in the note. A biller experienced in ICU work looks for total minutes, what was excluded, and a statement that the patient was critically ill.

Proving critical illness. Payers want to see a high chance of life-threatening decline and care that directly treats it. Experienced billers review notes against this standard before a claim goes out.

Procedures bundled with critical care. Some bedside procedures are bundled into critical care payment and others can be billed separately. Staff who know the bundling rules avoid both underbilling and overbilling.

Shared and split care. When a physician and a nurse practitioner see the same patient, or two physicians from different specialties both provide care, billing rules vary by payer. A knowledgeable biller tracks who did what and applies the right rules.

Same-day visits. A patient may receive a regular visit and then decline and need critical care later that day. Billers check payer policy on same-day services and add modifiers where allowed.

Teaching physician rules. Residents often provide care in the ICU. Claims only count the teaching physician's own time and presence, and billers confirm the attestation language is correct.

Diagnosis support. Severity diagnoses such as sepsis or respiratory failure have strict documentation standards. Coders query providers when the note and the diagnosis do not match.

How Westmont can help

• We match your ICU group with vetted billing experts who have experience in critical care and hospital-based specialties.
• Matched experts can support the full revenue cycle, from charge capture to payment posting.
• Denial management support helps address downgrades and time-related rejections.
• Credentialing and payer enrollment help is available for new providers joining your group.
• Reporting support can help you see where claims stall.

Frequently asked questions

How do you bill critical care time?

Critical care is reported by total time spent on direct care of a critically ill patient on a given date. The note should state the minutes and what was excluded, such as separately billed procedures. Many payers use set time thresholds for the first and added blocks. Confirm current rules with each payer and Medicare contractor.

Can you bill critical care and a regular visit on the same day?

Sometimes. If a patient first had a visit that was not critical care and later needed critical care, many payers allow both when the notes show distinct, separate care. Policies differ and modifiers may be needed. A critical care billing company checks each payer's rule before submitting the claim.

Which procedures are bundled into critical care?

Payers have lists of services that are included in critical care payment, such as certain data interpretation and basic monitoring tasks. Other procedures, like central lines, may be billed separately under the right conditions. Check current payer and Medicare guidance, as these lists can change.

Why are critical care claims denied?

Common reasons are missing time, notes that do not show critical illness, and duplicate billing by several physicians. Payers may also deny when another specialty billed overlapping critical care. A strong denial process looks at the note, the payer policy, and the appeal deadline.

Can nurse practitioners bill critical care?

Nurse practitioners and physician assistants can often bill critical care if they meet payer and state rules. Shared visits with a physician have special requirements for who performed the substantive portion. Rules differ, so a biller should confirm current Medicare and commercial policies.

Related billing services

• Pulmonology
• Hospitalist Medicine
• Emergency Medicine
• Neonatology / NICU
• Anesthesiology