99232 vs 99233: Time vs MDM for Hospitalist Subsequent Visits

99232 vs 99233 in one paragraph

99232 = subsequent hospital inpatient or observation, moderate-complexity MDM OR 35 minutes total time. CMS 2026 wRVU 1.39. 99233 = subsequent hospital, high-complexity MDM OR 50 minutes total time. CMS 2026 wRVU 2.00. The delta between the two is roughly 0.61 wRVU per encounter — significant across a hospitalist's daily census.

99232 by MDM: what counts

Moderate-complexity MDM for 99232 requires meeting moderate on two of three elements: Problems Addressed, Data Reviewed, Risk.

Problems Addressed at moderate: one acute illness with systemic symptoms, OR two or more stable chronic conditions, OR one undiagnosed new problem with uncertain prognosis. Most hospitalized patients clear this trivially because the admitting indication is usually a systemic acute illness.

Data Reviewed at moderate: review of imaging or extensive labs combined with ordering tests, OR discussion with another provider, OR independent interpretation of imaging. In hospital workflows, this is typically easy: you reviewed yesterday's labs and ordered today's.

Risk at moderate: prescription drug management (which any hospitalized patient on therapy meets), decisions about elective surgery, IV fluids with additives, social determinants impacting care.

99232 by time: 35 minutes total

Total time threshold for 99232 is 35 minutes on the calendar date of service. Total time includes face-to-face time with the patient, chart review, ordering, documentation, care coordination, and same-day communication with consultants. Activities by another provider do not count toward your time.

If your total time on the date of service is 25 minutes, 99231 is the appropriate code. 35 minutes hits 99232. 50 minutes hits 99233. 65+ minutes hits 99233 plus G0316 (Medicare prolonged inpatient service, each 15 minutes beyond 99233 threshold).

99233 by MDM: what counts

High-complexity MDM for 99233 requires meeting high on two of three elements.

Problems Addressed at high: one or more chronic illnesses with severe exacerbation, OR acute or chronic illness or injury that poses a threat to life or bodily function. Most ICU-level patients, septic patients, MI/CHF decompensation patients, and acute cerebrovascular patients clear this bar.

Data Reviewed at high: extensive data review (multiple categories: external records review plus imaging interpretation plus discussion with another provider).

Risk at high: drug therapy requiring intensive monitoring for toxicity (clozapine ANC, amiodarone LFTs, anticoagulation with bleeding concern), decision regarding hospitalization-level (escalation to ICU), decision regarding major surgery, decision to de-escalate care because of poor prognosis.

99233 by time: 50 minutes total

Total time threshold for 99233 is 50 minutes on the calendar date of service. Same time-counting rules as 99232.

If your total time exceeded 65 minutes, append G0316 (Medicare) in 15-minute increments. Commercial payers use 99356 / 99357 (deprecated by CPT but accepted by some plans). Verify per payer.

The decision tree

For each daily encounter:

• If the patient had a meaningful clinical event today (decompensation, escalation, new ICU transfer, code, family meeting about end of life): bill by MDM. The risk element clears high-complexity easily.
• If the patient is mid-course (improving on therapy, awaiting placement, stable on the floor): bill by MDM if you adjusted medications or reviewed labs (moderate MDM via prescription management or data review). 99232 is the right code.
• If you spent extensive time on family meetings, complex care coordination, or care planning: bill by time. Track total time carefully across the day.
• If the encounter was brief (4 to 5 minutes of work, stable patient awaiting discharge): bill 99231 (lower-complexity subsequent) and skip the time documentation altogether.
• If total time exceeded 65 minutes: bill 99233 plus G0316 (Medicare) for each additional 15-minute increment.

Audit-proof templates

MDM-based 99232: "Hospital day 3 for CAP. Patient improving on IV ceftriaxone and azithromycin, afebrile 24 hours, WBC trending down. Continued IV antibiotics, plan to transition to PO levofloxacin if afebrile overnight. Two chronic conditions (T2DM, CKD3) with stable medication management. Moderate MDM supported by prescription drug management and data review (lab trends, imaging review)."

Time-based 99233: "Hospital day 1 for septic shock. Total time on date of service was 65 minutes including admission history and exam (20 min), family meeting regarding prognosis and goals of care (20 min), ICU coordination and consultant discussion (10 min), order entry and documentation (15 min). High-complexity MDM also supports 99233 (acute illness with threat to life, decision regarding ICU escalation, drug therapy requiring intensive monitoring)."

Bottom line

Most daily mid-course hospital encounters are clean 99232 by MDM (prescription management plus lab review). High-acuity days (decompensation, escalation, family meetings) reach 99233 by MDM. Time-based billing wins when the day was counseling- or coordination-heavy. The wRVU delta between 99232 and 99233 (0.61) is meaningful across a daily hospitalist census; track it.