What Is CPT Code 99213? A 2026 Guide to the Established Patient Visit

What is CPT code 99213 and how is it billed?

CPT code 99213 is an office or outpatient E/M visit for an established patient at a low level of complexity, supported by either low-complexity medical decision making or 20 to 29 minutes of total time spent on the encounter date. An established patient is one seen by the same provider or group within the past three years, and procedure code 99213 refers to the same service.

• How to select 99213: Either path works. Low medical decision making qualifies on MDM alone, and 20 to 29 minutes of documented total time qualifies on time alone.
• 99213 vs 99214: 99214 requires moderate MDM or 30 to 39 minutes; if the visit meets that threshold, 99213 is undercoding.
• Established patient only: 99213 is not billable for a new patient. A comparable low-complexity new patient visit is 99203, and the two pay differently.

What Does CPT Code 99213 Cover?

CPT 99213 covers an office or outpatient E/M visit for an established patient at a low level of complexity. It is supported by either low-complexity medical decision making or 20 to 29 minutes of total time on the encounter date. Procedure code 99213 and CPT code 99213 refer to the same service; the terms are used interchangeably in billing systems and payer policies.

The code sits in the middle of the established-patient office E/M range, above the minimal 99212 and below the moderate 99214 and high-complexity 99215. Under the 2021 AMA E/M revisions, level selection no longer depends on history and exam bullet counts; it depends on either the level of medical decision making or the total time spent on the encounter date. That change simplified level selection but shifted the documentation burden to the MDM elements and to time capture.

An ‘established patient’ is one who has received professional services from the same physician, or from another physician of the same specialty and subspecialty in the same group practice, within the past three years. Everyone else is a new patient, reported with the 99202 through 99205 series, and the split between the two families is one of the most common sources of coding errors in high-volume outpatient settings.

What Is CPT Code 99213 Used For?

CPT 99213 is used to report a typical low-complexity return or follow-up visit for an established patient. Common examples include checking on a known condition, reviewing stable chronic issues, addressing a straightforward new complaint, adjusting a familiar medication, or evaluating a minor acute problem that does not require moderate-level decision making.

In urgent care settings, 99213 applies to patients who have been seen at the center within the past three years and return for a low-complexity concern. Typical urgent care 99213 scenarios include a follow-up on a previously treated infection, a check on symptom progression after a prior visit, or an uncomplicated evaluation of a minor issue in a patient the center already knows.

What 99213 is not used for matters as much as what it is used for. It is not the right code for a new-patient visit, regardless of complexity. It is not the right code for a moderate-complexity visit that meets the 99214 threshold, whether by MDM or by time. It is also not the right code for a preventive visit, which is reported with the 99381 through 99397 series when the encounter’s primary purpose is preventive care rather than a problem-focused evaluation.

How Do You Select 99213 by MDM or Time?

Under the 2021 AMA office E/M rules, 99213 is supported one of two ways. The first is low-complexity medical decision making. The second is 20 to 29 minutes of total time spent on the encounter date. Either path stands alone: a visit that documents low MDM qualifies on decision making regardless of time, and a visit that reaches the time threshold qualifies on time regardless of MDM.

Low-complexity MDM is judged by three elements, and the level requires meeting two of the three at the low level. The first element is the number and complexity of problems addressed at the visit, such as two or more self-limited or minor problems, one stable chronic illness, or one acute uncomplicated illness or injury. The second is the amount and complexity of data reviewed and analyzed, which at the low level includes limited categories of external records, tests, or communication with other providers. The third is the risk of complications from the management plan, which at the low level covers options like over-the-counter medications and minor surgery with no risk factors.

Time-based selection counts all provider time on the encounter date, including both face-to-face work with the patient and qualifying non-face-to-face work such as chart review, ordering tests, coordinating care, and documentation completed on the same date. The clock does not include separately reportable services performed by the billing provider. The documentation should identify which path (MDM or time) supports the level, and time-based notes should list the specific activities that make up the total.

What Is the Difference Between 99213 and 99214?

99213 reflects low medical decision making or 20 to 29 minutes of total time. 99214 reflects moderate medical decision making or 30 to 39 minutes. The documented MDM elements or the recorded time determine which level applies. Reflexively defaulting to 99213 gives away revenue on visits that meet the moderate threshold; defaulting to 99214 on low-complexity visits creates audit exposure.

One question we hear constantly from urgent care practice managers is why a practice that codes 85 percent of established visits as 99213 draws audit attention from Medicare Administrative Contractors. The reason is statistical uniformity. Real patient panels do not distribute that flat, and payers use specialty benchmarks to flag practices where the code mix drifts too far from peer norms. The fix is not to force visits into 99214 or 99215; it is to code to the documented MDM or time on each visit and let the distribution reflect the actual work.

Is 99213 for New or Established Patients?

99213 is an established-patient code. An established patient is one who has received professional services from the same physician, or from another physician of the same specialty and subspecialty in the same group, within the past three years. A patient without that history is a new patient and is reported with the 99202 through 99205 series, most commonly 99203 for a comparable low-complexity visit.

The distinction matters in urgent care because a large share of walk-in patients have no prior relationship with the center, which makes them new patients even when the presenting complaint is low complexity. Getting the new-versus-established determination right is one of the most common urgent care E/M issues, because the new-patient codes reimburse at a higher rate than the established-patient codes at the same level of complexity, and a misclassification is either a clean denial or a compliance concern.

Urgent care visits are also reported with the office and outpatient E/M series (99202 through 99215), not the emergency department series. When a presentation escalates to ED-level care and is transferred to an emergency department, the ED visit is reported separately with the ED codes; for the ED counterpart used at the lowest severity level, see CPT code 99281. Urgent care claims typically use place of service 20 (urgent care facility) rather than POS 11 (office), depending on how the center is credentialed.

In our experience matching providers with billing partners across urgent care networks, the fastest fix is a front-desk check that runs the patient against the last three years of the group’s records before the visit is coded.

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When Does Modifier 25 Apply to 99213?

Modifier 25 attaches to 99213 when a significant, separately identifiable E/M visit is performed on the same day as a minor procedure by the same provider. It signals to the payer that the E/M work went beyond the pre- and post-procedure evaluation inherent in the procedure itself. Common urgent care examples include a laceration repair with an unrelated new complaint, or a joint injection with a separate acute issue evaluated during the same encounter.

The documentation has to show that the E/M is separately identifiable, meaning a distinct history, exam, and MDM (or documented time) for the E/M problem, and a separate assessment and plan for it. Language like “office visit performed” appended to a procedure note does not clear the modifier 25 bar. The E/M has to read as a service that would have justified a visit on its own.

The 2027 landscape for modifier 25 is worth flagging now. In the CY 2027 Medicare Physician Fee Schedule proposed rule released July 14, 2026, CMS proposed reducing payment by 50 percent for a separately identifiable office or outpatient E/M visit furnished by the same practice on the same day as a procedure with a 0-, 10-, or 90-day global period. If finalized, the highest-valued service would pay at 100 percent and the other service would pay at 50 percent, which materially changes the math on 99213 with a minor procedure. For a fuller breakdown, see our guide to the 2027 modifier 25 payment cut.

Same-day add-on services extend beyond modifier 25. When a 99213 visit is performed outside regularly scheduled hours in an urgent care center, consider the after-hours service add-on. See our guide to CPT code 99051 after-hours services for when it attaches. Payer coverage of 99051 varies, and it is a common source of missed revenue in urgent care.

How Much Does Medicare Pay for 99213 in 2026?

Medicare publishes an annual allowance for 99213 in the 2026 Medicare Physician Fee Schedule, adjusted by locality. Because 99213 is one of the highest-volume codes billed to Medicare nationally, the allowance is one of the most-referenced baselines in fee-schedule modeling. The specific 2026 amount varies by MAC region and by whether the practice bills the facility or non-facility rate, so refer to the current CMS fee schedule for your locality.

Commercial payer contracts often reference the Medicare 99213 allowance as a benchmark but apply their own multiplier, which can push actual reimbursement above or below the Medicare number. Urgent care contracts sometimes carve out the E/M schedule separately from procedure payments, and understanding that carveout is often the difference between a healthy urgent care margin and a thin one.

One question we hear constantly from urgent care practice managers is whether the CY 2027 proposed modifier 25 payment cut is worth acting on now. The proposal is not final, and CMS invited public comment through September 2026, but modeling the practice’s 99213-plus-procedure volume against a 50 percent reduction on the lesser service is a useful exercise regardless of whether the rule finalizes as proposed. Practices that run that number early are the ones that can adjust workflow before the payment change lands.

Why Do 99213 Claims Get Denied?

The most common 99213 issues fall into six patterns: a level not supported by the documented MDM or time, an established-patient code billed for a patient without a prior three-year relationship, insufficient documentation of the decision making elements, place-of-service errors between office and urgent care facility, missing modifier 25 when a same-day procedure was performed, and downcoding when the documented work supported 99214.

• Documentation gap, where the note does not support either the low MDM level or the 20-to-29-minute time threshold.
• New-versus-established error, where 99213 was billed for a patient without a documented three-year relationship with the practice.
• MDM element error, where only one of the three MDM elements (problems, data, risk) was actually at the low level and the other two were straightforward.
• Place-of-service mismatch, where POS 11 (office) was billed for an urgent care facility that should have used POS 20, or vice versa.
• Missing modifier 25, where 99213 was billed alongside a same-day procedure without the modifier that identifies the E/M as separately identifiable.
• Downcoding, where documented moderate MDM or 30-plus minutes of time was billed at 99213 instead of 99214, leaving revenue on the table.

Across the billing companies we vet, the highest-yield fix on 99213 mix problems is a monthly self-audit that samples 20 to 30 established-patient charts and scores each visit against MDM or time. Practices that run that audit consistently find and correct their mix within one or two cycles. Practices that skip it keep leaving money on the table or absorbing downcodes without knowing why.

Frequently Asked Questions

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