99213 CPT Code: All You Need to Know to Bill Accurately and Get Paid Faster

The 99213 CPT code is one of the most common E/M codes in outpatient care. However, it is also one of the most misused. Small gaps in time tracking, medical decision-making (MDM), or patient status can lead to claim denials, slow payments, or audit risk.

In this guide, we explain when to report 99213, what payers expect in the note, and how the current time rule works. We also cover real scenarios, common mistakes, and how 99213 compares with nearby codes.

What Is the 99213 CPT Code?

CPT 99213 reports a level 3 office or outpatient visit for an established patient. The visit qualifies through low-complexity MDM or through at least 20 minutes of total provider time on the date of the encounter.

The American Medical Association (AMA) maintains the CPT code set. In practice, providers most often bill 99213 for routine follow-ups, stable chronic conditions, and simple acute problems. For the official framework, see the AMA E/M guidelines.

Official description of 99213

According to the AMA, 99213 describes an office or other outpatient visit for the evaluation and management of an established patient. The visit requires a medically appropriate history and/or exam. In addition, it requires either low-level MDM or 20 minutes or more of total time.

Key Requirements of the 99213 CPT Code

Before you report 99213, check each requirement below. Above all, the documentation must support every element you rely on.

1. The patient must be established

An established patient has received professional services from the same provider, or from another provider of the exact same specialty and subspecialty in the same group, within the past three years. If the patient is new, use the new patient codes instead.

2. History and exam must be medically appropriate

Since 2021, history and exam no longer determine the E/M level. Instead, the provider documents what is medically appropriate for the problem. For example, a focused history and a targeted exam are usually enough for a stable follow-up.

3. MDM must be at least low

Low-complexity MDM is the main clinical driver of 99213. To qualify, two of the three MDM elements must reach the low level. The visual below shows how this works.

4. Or total time must reach 20 minutes

Alternatively, the provider can select 99213 based on total time. Since 2024, the provider must spend at least 20 minutes on the date of the encounter. Time can include these activities:

• Reviewing records or test results before the visit
• Taking the history and examining the patient
• Counseling and educating the patient or family
• Ordering medications, tests, or referrals
• Writing the note in the medical record

However, time spent by clinical staff does not count. Likewise, time spent on separately billable procedures stays out of the total.

99213 vs. 99212, 99214, and 99215

Choosing the right level protects revenue and reduces audit risk. The table compares the four established patient office visit codes side by side.

In short, 99212 fits simpler visits, while 99214 needs moderate MDM or at least 30 minutes. For a deeper look at the next level, read our guide to the 99214 CPT code.

Clinical Scenarios That Support the 99213 CPT Code

The following examples show typical visits. Still, the final level always depends on what the provider documents.

Routine diabetes follow-up

A patient with well-controlled type 2 diabetes returns for monitoring. The provider reviews home glucose readings, checks vitals, and continues the current plan. Because the patient has one stable chronic illness and low-risk management, the visit supports 99213.

Controlled hypertension check

Similarly, a patient with controlled blood pressure comes in for a scheduled follow-up. The provider reviews one recent lab result, refills the current medication, and schedules the next visit. As a result, the visit meets low MDM.

Acute uncomplicated illness

An established patient presents with symptoms of an uncomplicated sinus infection. After a focused exam, the provider prescribes treatment and gives return precautions. One acute uncomplicated illness plus low-to-moderate risk supports 99213.

When a visit looks like 99213 but supports 99214

Now consider a patient with a chronic illness who reports side effects from a medication. The provider changes the dose and counsels the patient. In this case, a chronic illness with treatment side effects counts as a moderate problem. Together with prescription drug management, the visit usually supports 99214, not 99213.

Documentation Tips for the 99213 CPT Code

Clear notes help the claim pass payer edits and survive an audit. Therefore, make sure each note includes these items:

• Chief complaint: the reason for the visit, such as a hypertension follow-up.
• Relevant history: current status, changes since the last visit, and pertinent history.
• Focused exam: findings that relate to the complaint.
• Assessment and plan: each problem addressed, tests reviewed or ordered, and treatment decisions.
• Total time, if used: the minutes spent and the activities performed that day.

Who Can Bill CPT 99213?

Physicians (MD and DO) can report 99213. In addition, nurse practitioners and physician assistants can bill it when state scope-of-practice rules and payer policy allow. In every case, the visit must meet the same documentation and medical necessity standards.

Modifiers Often Used With 99213

• Modifier 25: a significant, separately identifiable E/M service on the same day as a procedure. Our guide to modifier 25 explains when it applies.
• Modifier 95: a synchronous telehealth visit, when the payer requires it.

Only add a modifier when the note fully supports it. Otherwise, the claim may face a denial or a payer review.

Common 99213 Billing Mistakes to Avoid

• Upcoding: billing 99213 when the visit only supports 99212.
• Downcoding: billing 99213 out of habit when the note supports 99214.
• Old time ranges: using the outdated 20 to 29 minute range instead of the current threshold.
• Missing time details: billing on time without recording total minutes.
• Unsupported modifiers: adding modifier 25 without a separate, documented E/M service.

Both upcoding and downcoding cost practices money over time. Our article on upcoding and downcoding in medical billing shows how to spot these patterns early.

How to Get Paid Faster for the 99213 CPT Code

• Match each diagnosis code to a problem in the note.
• Record total time whenever you plan to code by time.
• Check payer-specific E/M and telehealth policies.
• Audit a sample of E/M visits every quarter.
• Keep coders and providers trained on current AMA rules.

For primary care groups, these habits add up quickly. In fact, our family practice billing services team audits E/M levels as part of every claim cycle.

Final Thoughts on the 99213 CPT Code