Established patient office visit levels (99211-99215) are determined by medical decision-making (MDM) complexity or total time. The 2021 guideline change eliminated the requirement for history and exam documentation, allowing either MDM or time-based selection. 99213 (established, low MDM): 2 diagnoses, simple management, 20-29 minutes. 99214 (established, moderate MDM): 3+ diagnoses or 1 complex diagnosis, moderate risk, 30-39 minutes. 99215 (established, high MDM): multiple complex diagnoses, high risk, 40+ minutes. New patient codes (99202-99205) require all three key components. MDM is the primary selection method; time is an alternative when documented.
For established patients, code based on MDM complexity or documented time. Do not count history and exam—they are no longer required. MDM complexity is determined by (1) number and severity of diagnoses (self-limited vs. chronic stable vs. chronic unstable), (2) data reviewed (labs, imaging, records), (3) risk of complications, and (4) risk of morbidity/mortality. Low complexity: 2 problems, simple management. Moderate: 3+ problems or 1 chronic unstable problem, medication adjustment, lab review. High: multiple complex problems, medication changes with risk, coordination of care. Time includes face-to-face, documentation, chart review, and care coordination. Do not inflate time; payers audit time-based claims.
E/M office visits do not require prior authorization. Bill directly. However, payers audit high-level codes (99215) for frequency: billing 99215 more than 30% of the time triggers audits. Most practices average 40-60% 99214, 20-30% 99213, 5-10% 99215. Payers expect this distribution. Document MDM or time consistently. Frequent high-level coding without corresponding documentation results in denials and overpayment recovery demands. Code accurately to what is documented, not what might justify a higher code.
E/M office visit codes are not bundled with most procedures. If a procedure (joint injection, laceration repair) is performed, use modifier 25 on the E/M to indicate a distinct, separately identifiable service. The procedure is billed with its own code. Do not bill E/M with preventive visit codes (99381-99397) on the same day without modifier 25 and separate documentation. Same-day preventive and problem-focused E/M require distinct visit notes, not one combined note.
Document the chief complaint, relevant history, and findings. Focus on MDM elements: (1) number and status of diagnoses, (2) data reviewed (lab results, imaging, previous records), (3) assessment and plan for each problem, (4) risk factors considered. Time-based coding requires documentation of total time including face-to-face, review, and coordination. Do not fabricate time. State clearly "Total time: 35 minutes including chart review and coordination." For complex MDM visits, list each diagnosis with its management plan. Reference labs or imaging reviewed. Document decision-making rationale, especially for medication changes or referrals.
Yes. If the problem is complex (uncontrolled diabetes with multiple complications, or new diagnosis requiring workup), that single complex problem can justify 99214. MDM complexity is determined by problem severity and management, not number alone. Document the complexity clearly.
Payers will request documentation of time. If you cannot provide evidence (note stating time, start/end clock times), they will re-code to a lower level or deny the claim. Always document time clearly if using time-based selection. Write: "Total time including chart review and coordination: 38 minutes."
Yes, with modifier 25 on the E/M problem-focused visit to indicate it is a separate service. You must have separate documentation for each visit (distinct chief complaint, history, assessment, plan). Do not combine them into one note. Bill both codes on the same claim.
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