Critical care addl 30 min
CPT 99292 is used when a doctor provides additional critical care beyond the first hour to a critically ill or injured patient. Each unit represents an additional 30 minutes of intense, bedside care.
RVU breakdown
Conversion factor: 32.3465 · Source: CMS MPFS RVU25A · Confidence: High
Billing tips
Document exact start and stop times for all critical care activities, including bedside care, chart review, family discussions, and care coordination time spent on the unit/floor
Impact: Time discrepancies cause 60-70% of critical care denials. Precise documentation supports $115.48 per 30-minute unit.
Only bill 99292 after first 74 minutes of critical care time. First 30-74 minutes are included in 99291; bill first 99292 at 75 minutes, then every additional 30 minutes
Impact: Billing 99292 before reaching 75 total minutes results in automatic denial. Correct sequencing protects $115.48 per unit.
Exclude separately billable procedures from critical care time (central lines, intubation, etc.). Only count time for critical care evaluation and management
Impact: Including procedure time inflates critical care duration and triggers audits; can result in overpayment recovery of $115-$230+ per encounter
Do not round up to the nearest 30-minute increment. Use CPT time table: 105-134 min = 1 unit 99292, 135-164 min = 2 units, 165-194 min = 3 units
Impact: Improper rounding adds units not supported by documentation, risking $115.48 overpayment per incorrect unit
Only one physician may bill critical care time for the same patient during the same time period. Coordinate with consultants to avoid duplicate billing
Impact: Duplicate billing by multiple providers triggers automatic edits and requires refund of all units billed, plus potential False Claims Act exposure
Ensure medical necessity documentation clearly describes critical illness/injury requiring immediate physician attention and high-complexity medical decision-making
Impact: Lack of medical necessity documentation results in downcoding to lower-level E/M codes, losing $80-$100+ per encounter versus standard inpatient visit
Common denials
Insufficient total time documented - billing 99292 when total critical care time does not exceed 74 minutes
How to appeal: Submit detailed time log showing exact start/stop times for all critical care activities totaling at least 75 minutes. Include bedside notes, time-stamped chart entries, and attestation. Reference CPT guidelines requiring 30-74 minutes for 99291 alone.
Medical necessity not established - payer determines patient condition did not meet critical care criteria
How to appeal: Provide comprehensive clinical documentation demonstrating high probability of life-threatening deterioration, vital sign instability, organ system failure, or other critical illness markers. Include ICU flow sheets, medication drips (vasopressors, inotropes), ventilator settings, and physician narrative describing immediate threat to life.
Time overlap with procedures - payer believes separately billed procedures are included in critical care time
How to appeal: Submit minute-by-minute timeline clearly separating procedure time from critical care E/M time. Show that critical care time documented reflects only evaluation, management, and care coordination, not hands-on procedural time. Reference CMS guidelines allowing both when distinctly documented.
Duplicate billing - another provider billed critical care for same patient during overlapping time period
How to appeal: Provide documentation showing separate, non-overlapping time periods or different dates of service. If consulting physician, demonstrate distinct role and time spent. May need to coordinate with other provider to withdraw their claim if time overlap confirmed.
Frequently asked questions
How much does Medicare pay for CPT code 99292 in 2025?
Medicare pays $115.48 for CPT 99292 in non-facility settings and $102.86 in facility settings for 2025, based on the national average. Actual payment may vary by locality based on Geographic Practice Cost Indices (GPCI). This represents each additional 30 minutes of critical care beyond the first 74 minutes.
When can you bill CPT 99292 for critical care?
You can bill 99292 only after providing at least 75 minutes of total critical care time (first 30-74 minutes covered by 99291). Bill one unit of 99292 for 75-104 minutes total, two units for 105-134 minutes, and continue for each additional 30-minute increment. The patient must be critically ill or injured requiring constant physician attention.
How many units of 99292 can you bill per day?
There is no absolute limit, but you can bill 99292 based on actual time documented, typically up to 4-6 units per day being reasonable. For example, 195-224 minutes of total critical care time would support 99291 (first 74 min) plus 4 units of 99292. Times beyond 4-5 hours in a single day may trigger additional payer scrutiny requiring exceptional documentation.
What is the difference between CPT 99291 and 99292?
CPT 99291 is the primary critical care code covering the first 30-74 minutes of critical care and is billed once per day. CPT 99292 is an add-on code used only with 99291 to report each additional 30 minutes beyond 74 minutes. You cannot bill 99292 without first billing 99291, and 99292 has a lower reimbursement rate ($115.48 vs $230+ for 99291).
Can you bill 99292 with procedures like intubation or central lines?
Yes, you can bill 99292 with separately billable procedures, but you must exclude the procedure time from your critical care time calculation. Only time spent on critical care evaluation, management, and decision-making counts toward 99292 units. Document a clear timeline showing procedure time separately from critical care E/M time to avoid denials.
What are the RVUs for CPT code 99292?
CPT 99292 has 2.25 work RVUs, 1.11 non-facility practice expense RVUs (0.72 facility), and 0.21 malpractice RVUs, totaling 3.57 RVUs for non-facility settings. With the 2025 conversion factor of 32.3465, this yields the Medicare payment rate of $115.48 (non-facility) and $102.86 (facility).
How do you document time for CPT 99292 billing?
Document exact start and stop times for all critical care activities, including bedside assessment, chart review, family discussions on the unit, and care coordination. Use specific clock times (e.g., '14:20-14:55, 16:10-16:45') rather than durations. Clearly note activities performed and exclude time for separately billable procedures. Many providers use critical care time logs or templates to ensure compliant documentation.