If you run a medical practice, you already know that Evaluation and Management (E/M) codes are the lifeblood of your clinic’s revenue. And right in the middle of that billing bell curve sits the undisputed workhorse of outpatient medicine: the 99213 CPT code.

Because it is billed so frequently, many providers fall into the trap of putting 99213 on autopilot. But here is the reality, auto-coding leads to undercoding, revenue leakage, and compliance risks. The American Medical Association (AMA) and CMS routinely update E/M guidelines, and the 2026 fee schedules have brought fresh changes to how we document and get paid.

In this comprehensive guide, we are going to break down everything you need to know about billing CPT 99213 in 2026. 

What Is the 99213 CPT Code?

At its core, the 99213 CPT code is used to report an office or outpatient visit for an established patient. To qualify for this specific code, the encounter must require either a low level of medical decision-making (MDM) or a total of 20 to 29 minutes of provider time spent on the date of the encounter.

Think of 99213 as the standard code for your routine follow-ups. It is designed for visits that are more involved than a quick, simple check-in, but not quite complex enough to warrant a deep, multi-system investigation. It is the most commonly billed E/M code across multiple specialties, making it a critical component of your daily billing operations.

99213 CPT Code Description and Quick Facts

According to the official AMA guidelines, the description for this code is an “office or other outpatient visit for the evaluation and management of an established patient” .

Here are the quick facts every provider and medical coder should memorize for 2026:

• Patient Status: The code is strictly for established patients only.
• Time Requirement: You must document 20 to 29 minutes of total provider time on the date of service.
• MDM Level: The visit must meet the criteria for “low complexity” medical decision-making.
• Work RVU: The code carries a work Relative Value Unit (RVU) of 1.30 .
• 2026 National Rate: Medicare pays roughly $95.19 in a non-facility (office) setting.

99213 vs. New Patient Codes: What “Established Patient” Means

One of the most common administrative errors we see is mixing up new and established patient codes. CPT 99213 applies strictly to established patients.

But what exactly does “established” mean in the eyes of a payer? An established patient is someone who has received professional face-to-face services from you, or another physician of the exact same specialty and subspecialty within your group practice, within the past three years.

If the patient does not meet this three-year rule, they are legally considered a new patient. If you see a new patient for a low-complexity visit that mirrors a 99213, you need to bill its new-patient counterpart, which is CPT code 99203.

How to Choose 99213: MDM or Total Time

Gone are the days when you had to count bullet points for patient history and physical exams to justify your E/M levels. Under the modernized AMA guidelines, you have two distinct pathways to select CPT 99213: Medical Decision Making (MDM) or Total Time.

You do not need to satisfy both. You simply pick the pathway that best supports the clinical work you performed. If a visit took 15 minutes but involved managing a stable chronic illness, you can confidently bill 99213 based on the low-complexity MDM. Conversely, if a patient came in for a very straightforward issue but counseling them took 25 minutes of your time, you can bill 99213 based entirely on the time pathway.

99213 Low Complexity MDM Requirements

When you choose the MDM pathway, you need to meet the requirements for “low complexity.” To hit this mark, your documentation must satisfy at least two of the following three elements:

• Problems Addressed: You must manage two or more self-limited/minor problems, one stable chronic illness, or one acute, uncomplicated illness or injury.
• Data Reviewed/Analyzed: You need to meet minimal data requirements, which means at least one category of reviewing prior external notes, reviewing test results, or ordering new tests.
• Risk of Complications: The risk of patient morbidity or mortality from your chosen treatment plan must be low.

A common pitfall is overestimating the risk element. Low risk typically involves over-the-counter drug recommendations, physical therapy referrals, or minor procedures with no patient-specific risk factors.

99213 Documentation Requirements

If you want your claims to survive an audit, your clinical notes must explicitly justify the code. Payers are cracking down on “cloned” notes where providers carry over problem lists from past visits without actually addressing them during the current encounter.

If you are billing based on time, you cannot just write “spent time with patient.” You must document the exact minutes spent on the calendar date of the visit. A compliant note should read: “Total time: 24 minutes spent on chart prep, face-to-face counseling, and documentation” .

If you are billing based on MDM, use clear status words. Writing “Hypertension, stable on lisinopril” clearly proves you managed a stable chronic illness. Writing just “Hypertension” does not.

99213 Clinical Examples

To make this practical, let’s look at a few textbook examples of when 99213 is the perfect code:

• Stable Chronic Condition: A diabetic patient comes in for a routine follow-up; their numbers are stable, you refill their medication, and you make no major changes to the treatment plan.
• Uncomplicated Acute Illness: A teenager visits the clinic with a sore throat, tests negative for strep, and receives advice for symptomatic relief.
• Minor Adjustments: A patient with controlled hypertension comes in, and you make a very slight adjustment to a long-term medication with low risk.

99213 vs. 99212 vs. 99214: Key Differences

Understanding the nuances between these three codes is where practices either lose money to undercoding or invite audits through upcoding.

• CPT 99212 (Straightforward): This is a brief visit lasting 10 to 19 minutes, typically addressing a single self-limited problem.
• CPT 99213 (Low): This is your 20 to 29-minute visit for a stable chronic illness or an uncomplicated acute issue.
• CPT 99214 (Moderate): This code requires 30 to 39 minutes of time, or moderate MDM. It is used for a worsening chronic condition, multiple chronic illnesses, or an undiagnosed new problem with uncertain outcomes.

The financial gap here is massive. The 2026 Medicare rate for 99213 is roughly $95.19, while a 99214 jumps up to about $135.61. That is an approximate $40 difference per visit. However, do not assume that writing a prescription automatically bumps you to a 99214. One moderate element (like prescription management) does not make the visit a 99214—you must meet two of the three MDM elements at the moderate level.

99213 Modifiers and Same-Day Billing (Modifier 25, Telehealth)

Modifiers tell the insurance payer the specific story of the encounter. For 99213, there are two main scenarios you need to master:

Modifier 25: You append Modifier 25 when you perform a significant, separately identifiable E/M service on the same day as a minor procedure. For example, if a patient comes in for a 99213 visit regarding their asthma, and during the visit, you also administer a joint injection (CPT 96372), you would bill 99213-25 alongside the procedure code. Be careful—Modifier 25 is heavily audited for abuse.

Telehealth Modifiers: The landscape of remote care has changed. If you are conducting a 99213 visit virtually in 2026, you will use Modifier 95 for synchronous audio-video telehealth. If the visit is audio-only, you will use Modifier 93. Additionally, you must use Place of Service (POS) 10 if the patient is at home, or POS 02 if they are at another facility .

99213 Reimbursement and RVUs in 2026

It is vital to know exactly what your time is worth. In 2026, the national Medicare conversion factor is set at $33.4009.

When we calculate the 1.30 work RVU alongside practice expense and malpractice RVUs, the national baseline Medicare rate for a 99213 in a non-facility (office) setting sits at approximately $95.19. If you perform the exact same service in a facility setting, like an outpatient hospital, the physician fee drops to about $57.45.

Why the difference? CMS has actively trimmed facility practice expenses in 2026, lifting office payments while lowering hospital-clinic physician rates.

99213 Reimbursement in Texas

Because Medicare rates are adjusted using the Geographic Practice Cost Index (GPCI), a provider in New York does not get paid exactly the same as a provider in Texas.

For 2026, the Medicare allowable rate for an office-based 99213 in Austin, Texas, is approximately $96.09.

But Medicare is just the baseline. What about commercial payers? The average provider charge for this code nationwide is nearly $179.97. Commercial insurance companies in Texas typically negotiate allowable rates that sit between 120% and 200% of the Medicare rate. This means if you are billing a private insurer like Blue Cross Blue Shield of Texas or UnitedHealthcare, your actual reimbursed rate for a 99213 will likely land anywhere between $115 and $190, depending on your specific payer contracts.

Understanding your local Texas fee schedules is critical to ensuring your practice is not leaving money on the table during contract negotiations.

Common 99213 Billing Mistakes and Denial Reasons

Even the most seasoned providers experience claim denials. When it comes to 99213, the most frequent culprits include:

• Time pathway errors: Failing to document the exact minutes spent on the date of service.
• Diagnosis mismatch: The ICD-10 diagnosis code does not clearly support the medical necessity of the low-complexity visit.
• Invalid use of Modifier 25: Billing an E/M code with a minor procedure when the E/M work was not truly separate and identifiable.

Disclaimer: Medical coding guidelines are subject to change. Always refer to the most recent AMA CPT manual and your local Medicare Administrative Contractor (MAC) for the latest compliance rules. 

99213 Audit Risk and Compliance Best Practices

Insurance companies employ algorithms to look for billing anomalies. Because 99213 is the most common code, billing an unusually high ratio of 99214s compared to your peers will instantly flag you for an audit. Conversely, exclusively billing 99213s out of fear of audits means you are severely undercutting your revenue.

The best compliance practice is a strong internal audit program. Routinely pull random charts and ask a simple question: Does this note stand on its own to prove 20 minutes of time, or two out of three low-complexity MDM elements? If the answer is no, your documentation needs tightening.

How Medical Billing Services Texas (MBS Texas) Helps With 99213 Billing

We understand that you did not go to medical school to become a coding expert. Navigating the nuances of MDM guidelines, Texas-specific commercial payer contracts, and ever-changing CMS rules is a full-time job.

At Medical Billing Services Texas (MBS Texas), we specialize in optimizing revenue cycles for healthcare providers across the Lone Star State. We ensure your claims go out clean the first time, properly applying modifiers and capturing the maximum allowable reimbursement for codes like 99213 and 99214. If you are tired of dealing with confusing denials and shrinking margins, let our local experts handle the heavy lifting.

Frequently Asked Questions

What does 99213 mean? 

CPT 99213 is a medical billing code used to classify an office or outpatient visit for an established patient that requires a low level of medical decision-making.

How much time is required for CPT 99213?

If you are choosing to bill this code based on time rather than clinical complexity, you must document a total of 20 to 29 minutes of provider time spent on the patient’s care on the date of the encounter.

What is the difference between 99213 and 99214? 

The core difference lies in complexity and time. A 99213 requires low complexity or 20 to 29 minutes, while a 99214 requires moderate complexity (such as treating a worsening chronic condition) or 30 to 39 minutes.

Can I bill 99213 for a telehealth visit? 

Yes, 99213 is fully approved for telehealth services. You just need to append Modifier 95 for an audio-video visit or Modifier 93 for an audio-only visit, along with the appropriate place of service code.

How much does Medicare pay for 99213 in 2026? 

The 2026 national Medicare rate is approximately $95.19 for visits performed in an office setting, and about $57.45 for visits performed in a hospital or facility setting.

Reviewed by the Medical Billing Services (MBS Texas) Team. Last updated October 2026.

Disclosure: This page was drafted with AI assistance and reviewed and edited by our team for accuracy.