Hospitalist billing guidelines for 2026, admission to discharge

Hospitalist billing guidelines start with one code family

If you searched for hospitalist billing guidelines, the first thing to know is that inpatient and observation care now share one code family. Since January 1, 2023 the AMA deleted the separate observation codes (99217-99220 and 99224-99226), and CMS bills hospital inpatient and observation care with the same codes: 99221-99223 for the first visit, 99231-99233 for later visits, 99238-99239 for discharge day, and 99234-99236 when the patient is admitted and discharged on the same date.

Levels for these codes can be chosen by medical decision making (MDM) or by total time on the date of the encounter. History and exam must be medically appropriate, but they no longer set the level. That one change does most of the work: a hospitalist who documents MDM clearly, or records total time when the day was long, can support the level without a checklist of exam elements.

For an ER and hospitalist group the hard part is not the code descriptors. It is the handoffs: the patient seen in the ED and admitted, the short observation stay, two physicians from the same group on the same day, and the discharge that happens hours after admission. Each has a Medicare rule, and each is a common reason a hospitalist claim is denied or paid at the wrong level.

Step 1: the patient comes up from the ED

When the same practitioner sees a patient in the emergency department and decides to admit or place the patient in observation, Medicare pays only the initial hospital inpatient or observation code. It does not pay both E/M services, and it does not pay an ED visit by the same practitioner on the same date. Everything that practitioner did in connection with the admission that day is part of the initial hospital care.

In a combined ER and hospitalist group this needs a rule in the charge workflow. If the emergency physician and the admitting hospitalist are different people, each bills their own service: the ED visit (99281-99285, POS 23) and the initial hospital care (99221-99223). If one person did both, drop the ED code and bill the initial hospital care, counting the ED work toward its MDM or total time.

When the patient is seen in the office or elsewhere one day and admitted the next, Medicare pays both visits, even if fewer than 24 hours have passed.

Step 2: choose admission, same-day, or admit plus discharge

Medicare uses length of stay and the discharge date to decide which codes apply. Get this wrong and the claim either loses the discharge service or bills one that is not payable.

Step 3: the daily visits

Subsequent hospital care (99231-99233) is billed once per day. Medicare treats initial and subsequent hospital care as per diem services that can be reported once per day by the same physician or by physicians of the same specialty in the same group. Physicians in the same group and specialty bill as though they were one physician.

That matters for hospitalist groups that hand off at shift change. If the day physician sees the patient in the morning and the night physician returns in the evening, the group bills one subsequent visit for the day, and the level reflects the combined MDM or the combined time. Two 99232 lines on the same date for the same patient from the same group will deny or be recouped.

When the patient is critically ill, the rules switch. Critical care (99291-99292) is billed on time, and services on the same day that do not meet the critical care standard are reported with a subsequent hospital care code. Keep start and stop times and the critical care statement in the note; our emergency department billing services page sets out the Medicare minute thresholds.

Step 4: prolonged time and the discharge

For Medicare, prolonged hospital inpatient or observation care is reported with HCPCS G0316, not a CPT prolonged code. It applies only when the level was chosen by time and total time exceeds the time for the highest level by 15 minutes or more of medically necessary service. Commercial payers may follow CPT instead, so check the payer before you add a prolonged code.

Discharge day management is 99238 (30 minutes or less) or 99239 (more than 30 minutes). Document the total discharge time when it passes 30 minutes; without a time statement, the claim supports only 99238.

What the codes pay in 2026

The chart below uses the CMS October 2026 relative value file: facility total RVUs multiplied by the 2026 conversion factor for clinicians who are not qualifying APM participants ($33.4009). These are national amounts before geographic adjustment, coinsurance and sequestration, so your local Medicare allowable will differ. They show the spread between levels, which is why level support matters.

A hospitalist charge checklist

• Admitted from the ED by the same practitioner: bill initial hospital care only and count the ED work toward it.
• Under 8 hours and discharged the same date: 99221-99223 only.
• 8 to 24 hours, same date: 99234-99236.
• Discharged on a later date: initial code on day one, 99238 or 99239 on the discharge date.
• One subsequent visit per day per group and specialty; combine the day and night notes.
• Level by MDM or total time; if by time, write the total.
• G0316 for Medicare prolonged care only when the level was set by time and the threshold is passed.
• Rendering hospitalist enrolled and effective with the payer before the claim goes out.