Can you bill critical care 99291 and an ED E/M on the same visit?

Can you bill an ED E/M code and 99291 on the same date?

Usually not. When an emergency department patient needs critical care, the critical care codes carry the encounter and the ED visit level goes away. Noridian states it flatly: an ED visit code may not also be reported by the same provider or another provider of the same group on the same day as a critical care service. CMS enforces it as a named recovery audit issue, under which emergency department services are not payable on the same calendar date as critical care when billed for the same beneficiary by the same service provider, matched on tax ID and specialty code. Codes 99281 through 99285 are the ones it names.

The exception is sequence, and it is the whole answer for a busy department. If the physician worked the patient up as an ordinary ED visit and the patient deteriorated later the same date, both services can be paid. CGS puts the test this way: both the critical care and the previous E/M service may be paid if documentation in the patient's medical record supports the medical reasonableness and necessity of both. CMS adds three conditions: the other service has to be medically necessary, provided before the critical care, and separate and distinct with no duplicative elements.

Run it the other way round and it fails. Critical care first, then a lower level re-evaluation later in the shift, is one critical care encounter, and the second line comes back.

Which modifier goes on which line?

Modifier 25 goes on the ED visit, not on 99291. ACEP's reimbursement FAQ records that CMS has designated modifier 25 be used when both a 9928x service and critical care are provided on the same date by the same group. The logic follows the modifier's definition: 25 marks the significant, separately identifiable E/M service, and here that is the earlier ED workup. The 99291 line goes out clean.

CPT and Medicare do not fully agree. ACEP records the CPT position as a plain yes, that CPT allows reporting both an E/M service and a critical care service on the same day, while Medicare's narrower rule governs a Medicare claim and commercial contracts vary enough that the contract decides. The same two-services-one-date logic plays out when a wellness visit is paired with a problem-oriented visit, and it fails in the same place: a note that never separates the two.

How do you build the claim when the patient deteriorates?

Six steps, in order, and the first is the one that gets skipped.

1. Confirm the sequence in the record. The ED evaluation has to precede the critical care, with times, or there is no second service to bill.
2. Document the ED visit on its own terms, ending before the patient met critical care criteria.
3. Record total critical care minutes as a number, not as a phrase such as more than 30 minutes.
4. Select the ED level from the ED work alone, without borrowing the critical illness to justify it.
5. Append modifier 25 to the ED line. Nothing goes on 99291.
6. Check that nothing bundled into critical care sits on the claim as a separate line.

Coded correctly, a qualifying deterioration encounter allows about $385. Reported as critical care alone it allows about $211, and the ED workup that was performed, documented and payable is the line that disappears, worth about $174. Those are national unadjusted amounts calculated from published 2024 relative values at the CY2026 conversion factor, so treat them as estimates.

A worked example: six physicians, 24,000 ED visits a year

Take an emergency medicine group staffing one department, six physicians, 24,000 visits a year. Assume that in 200 encounters a year the patient arrived stable, was worked up at a level supporting 99285, and deteriorated afterwards. Billed correctly, those 200 carry an extra $174 each, which is $34,800 a year the group performed and would otherwise never ask for. Double it to 400 qualifying encounters and it is $69,600, without more patients, a better contract or a minute of extra clinical work.

Those are modelled assumptions rather than measured rates, so run them against your own remits. What we can say from our reviews is that the capture gap is real: across five surgical groups, 8% of ED and on-call consults performed were never captured as charges. A line nobody submits never denies, never reaches a denial report and never gets worked.

How many minutes does 99291 need, and why does Medicare want 104 for the first 99292?

CPT code 99291 covers the first 30 to 74 minutes and is reported once per date. Add-on 99292 covers each additional 30 minute increment. Below 30 minutes there is no critical care service, and the encounter falls back to an ED visit level.

Then Medicare diverges. Its FAQ on split or shared visits and critical care states that a practitioner spending more than 74 minutes may report 99292 only when a whole additional 30 minute increment has been spent, in other words at 104 minutes. Noridian publishes the ladder: under 30 minutes, another E/M; 30 to 103, 99291 once; 104 to 133, add one 99292; 134 to 163, two; 164 to 193, three.

So CPT allows the first 99292 at 75 minutes and Medicare at 104. That 29 minute window cuts both ways. Report 99292 at 90 minutes on a Medicare claim and it is an overpayment waiting to be recouped. Drop it at 90 minutes on a commercial claim following CPT and it is revenue never asked for.

At 95 minutes of documented critical care the CPT thresholds allow about $317 against $211 under the Medicare thresholds. At 110 minutes it is $423 against $317, at 140 minutes $529 against $423. Past 74 minutes the gap holds at about $106, one unit of 99292.

What counts as critical care billing time

Counted: time evaluating, treating and managing the patient's condition, at the bedside and on the unit while coordinating care, including review of results and discussion with colleagues. Noncontinuous time may be aggregated across the date. Not counted: time off the unit, since the provider is not immediately available; teaching sessions with residents; time on separately reportable procedures; and activities which do not directly affect treatment.

What is bundled into critical care, and what can you still bill separately?

CMS lists the bundled work as interpretation of cardiac output measurements, chest x-rays, pulse oximetry, blood gases, gastric intubation, temporary transcutaneous pacing, ventilator management and vascular access. In codes: pulse oximetry 94760 to 94762, chest x-ray professional component 71045 and 71046, gastric intubation 43752 and 43753, transcutaneous pacing 92953, ventilator management 94002 to 94004 and 94660, and vascular access 36000, 36410, 36415, 36591 and 36600.

Check the vintage of whatever list your coders work from. Widely read pages, including at least one Medicare contractor fact sheet, still list chest x-ray codes 71010, 71015 and 71020, deleted effective 1 January 2018. A bundled list naming deleted codes is one nobody has revisited in years, which is reason enough to go back to the primary source rather than the summary of it. Keeping these current is ordinary coding work done against the current code set.

Separately reportable alongside critical care: CPR 92950, endotracheal intubation 31500, central venous catheter placement 36555 and 36556, intraosseous access 36680, tube thoracostomy 32551, temporary transvenous pacemaker insertion 33210 and flow directed catheter placement 93503. Central venous and intraosseous access are not bundled, despite how often they get written off as included. Whatever you bill separately, its minutes come out of the critical care time.

The instinct behind most of these errors, that a second service on one date must sit inside the first one's payment, also drives the mistakes on the global period after a cardiac catheterization.

Does the hospital facility claim follow the same rule?

This is where most published guidance stops, and it decides whether the hospital gets paid. The tax ID and specialty test above is written for the professional claim. The hospital reports under the outpatient prospective payment system, and CMS frames that as a choice between two codes rather than a prohibition on pairing them.

From the CMS outpatient questions and answers: when a minimum of 30 minutes of critical care is provided in a hospital outpatient setting, the hospital must report 99291. Below that line, hospitals should bill for a visit, typically an emergency department visit, at a level consistent with their own internal guidelines. Payment for 99292 is packaged, so the add-on brings the facility nothing extra.

Facility time is counted differently too. CMS says the reportable time is time spent by a physician and hospital staff engaged in active face to face critical care, and that where several staff are simultaneously engaged, the time can only be counted once. A facility claim built by adding up each nurse's minutes is wrong for that reason alone. Hospitals must also follow the CPT instructions for 99291, though the NCCI policy manual carves facilities out of some practitioner level bundles.

One honest limit: the public record does not appear to contain a CMS sentence expressly forbidding a hospital from reporting both an ED visit level and 99291 for one encounter. The either-or reading above is how CMS frames the choice, not a quoted prohibition, and a hospital taking a position on it should confirm with its Medicare Administrative Contractor in writing. Two sides of one encounter answering to different rules is the same structure as the facility fee and the surgeon's professional fee, and emergency room billing needs the same discipline: reconcile the two claims against each other, case by case.

What happens when two physicians in the same group both provide critical care?

Physicians of the same specialty within one group are paid as though they were a single physician, so 99291 is used once per calendar date per patient by that group. A base unit of 99291 can then be billed with subsequent 99292 units by other group members over a 24 hour period: the second physician's time is not lost, it just does not start a second first hour.

Physicians of a different specialty may each report 99291 where each provides care unique to their own specialty and manages at least one of the patient's critical illnesses or injuries. An emergency physician and an intensivist from another group, each managing a different failing organ system, can each report a first hour. The same two inside one group cannot. For split or shared services, the practitioner furnishing more than 50% of total time reports it with modifier FS, and each practitioner's time has to be documented. Where an ED group and a hospitalist group both touch the patient, the tax IDs on the two claims are what the payer edit reads.

Why do these claims get denied, and how do you appeal one?

A bundling denial on the ED line while the critical care pays is the usual shape. Sometimes it is correct, because the sequence was not there. Often it is a modifier on the wrong line.

Across the claims we audit, eligibility and coverage errors cause 24% of denials, coding and modifier errors 21%, missing or invalid prior authorization 17%, duplicate claims 9% and timely filing 6%, with 23% from everything else.

Work a critical care bundling denial in this order.

1. Check the sequence before touching the claim. If the ED evaluation does not precede the critical care, the denial is right and the line should be withdrawn, not appealed.
2. Confirm which entity billed what. The edit matched on tax ID and specialty code, so two physicians you think of as separate may be one to the payer.
3. Confirm modifier 25 sat on the ED line and not on 99291.
4. Confirm total critical care minutes appear in the record as a number.
5. Appeal with the timeline from the record, times included, not a narrative about how sick the patient was.

It is worth filing. Appeals filed by Luxen were overturned 68% of the time, at a median appeal turnaround of 34 days from filing to payer decision. The problem is that most never get filed: 19% of denied claims were never reworked or appealed. Nor is this a scatter of one-offs, because the top three denial reasons accounted for 58% of denied dollars in the average practice. A concentration like that is a queue, and working it as a queue beats working it claim by claim. Front-end eligibility and prior authorization checks take the largest slice off the top first.

Should ED coding sit in house or with a billing partner?

In house wins whenever one named person owns the rule set and reads remits against it. These rules are knowledge rather than volume: the sequence test is one sentence, the minute ladder fits on an index card, the bundled list is a paragraph. The case for a partner is rarely one code family. Fully loaded in-house billing cost 7.9% of collections for practices under $2M, across 96 practices that shared payroll data, against an outsourced range of 3% to 6% of collections. Across our client practices, first-pass denial rate fell from 14.2% to 6.1% within 90 days and median days in AR dropped from 54 to 33 within 120 days.

If you are comparing options, the questions that separate vendors sit on our medical billing companies page, and the whole-cycle view matters more than any one code family, which is what revenue cycle management covers. Either way, start by pulling your last 90 days of claims carrying 99291 and counting how many also carry an ED line. A billing review runs that against your own remits rather than averages.

99291 or 99285: which code carries the emergency department encounter?

The two codes answer different questions, and on a single encounter only one of them normally survives. This is what changes between them.

One line to hold on to: the ED level is what the encounter was before it became critical, and it survives only when the record proves that order.

Emergency medicine

This is the specialty the question belongs to and the one carrying the exposure, because both errors live here. One direction is the ED level billed alongside critical care with no documented sequence, which CMS targets as a named recovery audit issue. The other is the ED level that qualified and was never billed, which produces no denial and so never surfaces. A department should be able to report, monthly, how many claims carried 99291 and how many of those also carried a 99285 with modifier 25. If nobody can produce that number, neither error is being managed.

Hospital medicine and intensivists

The same-specialty same-group rule decides most of these claims. An ED physician and a hospitalist are different specialties, so each can report a first hour where each manages a different critical problem, but two hospitalists in one group share a single 99291 and add 99292 units across the 24 hour period. Split or shared reporting with modifier FS turns on who furnished more than half the total time, which means each practitioner's minutes have to be documented separately rather than summed at the end by a coder.

Urgent care

Critical care codes are rarely the right answer in urgent care, and reaching for them is a fast route to an audit. A genuinely critical patient is stabilised and transferred, and the billable service is the visit actually furnished plus any separately reportable procedure, not a 99291 built from the drama of the encounter. The coding question that matters more in this setting is whether the visit was registered as self-pay when coverage existed: 26% of visits registered as self-pay had active coverage found later.

Neonatal and pediatric critical care

Different codes entirely, and the 99291 rules do not transfer. Inpatient neonatal and pediatric critical care run on their own per-day code families rather than on 30 minute increments, so the minute ladder, the 104 minute Medicare threshold and the aggregation rules above do not apply. What does carry over is the sequence principle: an evaluation furnished before the patient met critical care criteria is a different service from the critical care that followed it, and the record has to show which came first.

Primary care and internal medicine

The relevance here is the modifier 25 discipline rather than critical care itself, since these physicians rarely report 99291. The same failure mode recurs: two services on one date, one note, and nothing in the documentation separating them. In primary care we see it as problem-oriented visits billed with an annual wellness visit and missing modifier 25 on 12% of claims. The fix is identical in both settings, and it is in the note rather than on the claim.