99213 CPT Code: Description, MDM Requirements, and Reimbursement

The 99213 CPT code is one of the most commonly billed E/M codes in outpatient care, and that's exactly why payers look at it so closely. If you'd rather have a coding or RCM team make sure your 99213 claims are documented and billed correctly, talk to our team. If you want to understand the code first, keep reading.

99213 CPT Code Description for Established Patient Office Visits

CPT code 99213 is used for an office or outpatient visit with an established patient. The visit needs a medically appropriate history or exam and a low level of medical decision making (MDM). If you're billing by time instead, you need at least 20 minutes of total time on the date of the visit.

Who Counts as an Established Patient for 99213

A patient is established if they've seen the same physician, or another physician of the exact same specialty and subspecialty in the same group, in the last three years. If not, you're in new patient territory, which runs from 99202 to 99205.

Since 2021, history and exam no longer determine the level of an office visit. Code selection is based on either MDM or total time.

How to Qualify a Visit for 99213 Using Medical Decision Making

Under the AMA E/M guidelines, you need two of the three MDM elements at the low level to bill 99213. If you can only support straightforward MDM, the right code is 99212.

Problems That Meet Low Complexity for 99213

Low complexity means at least one of the following:

• Two or more self-limited or minor problems
• One stable chronic illness
• One acute, uncomplicated illness or injury

Two or more stable chronic illnesses are not low complexity. They meet the moderate level, which supports 99214.

Data Review That Counts as Limited for 99213

Limited data means meeting one of these two categories:

• Tests and documents: any two of the following, in any combination: reviewing prior external notes from each unique source, reviewing the result of each unique test, or ordering each unique test.
• Independent historian: the assessment needed history from someone other than the patient, like a parent or caregiver.

Independently interpreting a test doesn't belong here. That's a moderate-level data element.

Risk Level That Supports 99213 vs 99214

The risk from additional testing or treatment has to be low. Commonly cited examples are over-the-counter drug management and minor procedures without identified risk factors. Prescription drug management is different: the AMA lists it as moderate risk, so if another element also reaches moderate, the visit moves up to 99214.

99213 Time Requirement for 2026 Billing

If you're coding by time, the physician or other qualified health care professional needs at least 20 minutes on the date of the encounter. CPT dropped the time ranges for office visits in 2024, so 20 minutes is now a minimum, not the low end of a range.

Total time counts both face-to-face and non-face-to-face work done that day: reviewing records, ordering tests, counseling, and documenting. Clinical staff time doesn't count. Write down the exact total, not an estimate.

How 99213 CPT Code Reimbursement Is Calculated

There's no single Medicare rate for 99213. Payment is built from three relative value units (RVUs): physician work, practice expense, and malpractice. Each one is adjusted by the geographic practice cost index (GPCI) for your locality, and the total is then multiplied by the conversion factor Medicare sets each year in the Physician Fee Schedule.

Why 99213 Payment Changes by Location and Setting

Because of that formula, the same code can pay differently from one place to another. Setting matters too. A visit in a non-facility setting like a physician's office usually pays more than one in a facility setting, because the practice is covering more of the overhead. Commercial payers, on the other hand, set their own rates by contract.

Where to Check Current 99213 Medicare Rates

The CMS Physician Fee Schedule Look-Up Tool shows the current amount for your locality. If you're billing telehealth, also check CMS's current telehealth policy and modifier rules, including Modifier 95.

When to Bill 99214 Instead of 99213

Coding visits that meet moderate MDM as 99213 is one of the most common E/M errors, so it's worth reviewing our 99214 CPT code guide alongside this one.

99213 Documentation Requirements That Hold Up to Payer Review

The note has to show low MDM in at least two elements, not just suggest it:

• Assessment: list each problem addressed and its status. "Hypertension, stable, continue current regimen" is more defensible than "HTN."
• Plan: state the management decision for each problem instead of "continue current plan."
• Data: document what was reviewed or ordered, and how it informed the decision.
• Time: if you're billing by time, write down the exact minutes and what you spent them on.

Common 99213 Billing Errors That Lead to Denials or Undercoding

• Defaulting to 99213 for every established patient, even when the visit meets moderate MDM.
• Coding two or more stable chronic illnesses as low complexity.
• Counting a single data item as limited data.
• Billing 99213 for a patient who isn't established.
• Writing plans that don't tie a specific decision to each problem.

Get Help With 99213 and E/M Coding Accuracy

Many 99213 denials and undercoding problems come from documentation gaps that a coder can catch before the claim goes out. Vinali Group's nearshore medical coding teams work during U.S. business hours inside your existing systems, and we're SOC 2 Type II and ISO 27001 certified and HIPAA compliant. Practices focused on revenue cycle work can also find dedicated support through our sub-brand Vinali RCM.

Explore our virtual healthcare services or contact our team to talk about coding support for your practice.