Accurate E/M coding is essential for proper reimbursement and compliance. CPT code 99213 is one of the most commonly billed codes for established patient visits in the United States. This guide explains how to use CPT 99213 correctly, including billing guidelines, documentation requirements, reimbursement rates, and how it compares to 99214.
What Is CPT Code 99213?
Definition of CPT 99213
E/M code 99213 is used for an established patient office visit CPT code that requires a medically appropriate history and/or examination and low level medical decision making (MDM). It is commonly referred to as a Level 3 office visit code.
Under current E/M guidelines, code selection is based on:
- Medical Decision Making (MDM), or
- Total time spent on the date of encounter
Who Can Bill CPT 99213?
The following healthcare professionals may bill CPT 99213 (if within scope of practice and payer guidelines):
- Physicians (MD/DO)
- Nurse Practitioners (NP)
- Physician Assistants (PA)
- Other qualified healthcare professionals
Always verify payer-specific billing rules, including Medicare and commercial insurance policies.
Established Patient Requirement
CPT 99213 applies only to established patients.
An established patient is someone who has received professional services from the same provider or another provider of the same specialty within the same group practice within the past three years.
CPT 99213 Documentation Requirements Guidelines
Accurate documentation is critical to avoid denials and audits. Below are the updated CPT 99213 documentation requirements under current E/M guidelines.
Medical Decision Making (MDM) Criteria
To bill 99213 based on MDM, documentation must support low level MDM.
Low level MDM generally includes:
- 2 or more stable chronic illnesses
(e.g., stable hypertension and hyperlipidemia)
OR
- 1 acute, uncomplicated illness
(e.g., UTI, sinusitis, minor injury)
Plus:
- Limited data review
- Review of test results
- Ordering basic labs
- Review of external notes (limited)
And:
- Low risk management
- Prescription management
- Over-the-counter medication advice
- Routine follow-up care
This aligns with standard 99213 billing guidelines for a Level 3 visit.
Time-Based Billing for 99213
You may also bill CPT 99213 based on total time.
CPT 99213 time requirement :
🕒 20–29 minutes total time on the date of the encounter.
What Counts Toward Total Time:
- Face-to-face patient time
- Reviewing records before visit
- Counseling and education
- Ordering tests
- Documenting in EHR
- Care coordination (same day)
What Does NOT Count:
- Time spent by clinical staff
- Time on separate dates
- Travel time
- General office overhead activities
Proper time documentation must clearly state total minutes spent.
99213 Documentation Checklist
To support compliant billing, documentation should include:
- ✔ Chief complaint
- ✔ Relevant history
- ✔ Medically appropriate examination
- ✔ Assessment and plan
- ✔ Clear MDM or total time
Incomplete documentation is one of the top reasons for denials and downcoding.
When Should You Bill CPT Code 99213?
Common Clinical Scenarios
CPT 99213 is appropriate for routine but medically necessary follow-ups, including:
- Hypertension follow-up
- Diabetes management (stable)
- Minor infections (sinusitis, UTI, bronchitis)
- Medication management
- Stable chronic condition monitoring
These visits typically involve low complexity medical decision making.
When NOT to Use 99213
Do not bill 99213 when:
- The visit is too simple and qualifies for 99212
- The case involves moderate complexity MDM (use 99214)
- Time exceeds 29 minutes and meets 99214 criteria
- Documentation does not support low-level MDM
Incorrect code selection increases audit risk.
CPT 99213 vs 99212 vs 99214
Choosing the correct E/M code prevents revenue loss and compliance issues.
Key Differences in MDM
| Code | MDM Level | Problem Complexity |
|---|---|---|
| 99212 | Straightforward | Minor/self-limited |
| 99213 | Low | Stable chronic or acute uncomplicated |
| 99214 | Moderate | Worsening chronic or new undiagnosed problem |
Many billing errors occur when providers confuse 99213 vs 99214 difference, especially when moderate risk elements are involved.
Time Comparison Chart
| Code | Time Requirement |
|---|---|
| 99212 | 10–19 minutes |
| 99213 | 20–29 minutes |
| 99214 | 30–39 minutes |
Always ensure total documented time matches billing.
Reimbursement Comparison
Generally:
- 99212 → Lower reimbursement
- 99213 → Moderate reimbursement
- 99214 → Higher reimbursement
Upcoding without documentation can trigger payer audits.
CPT 99213 Reimbursement Rates (2025)
Medicare Payment for 99213
The Medicare 99213 reimbursement rate varies slightly by geographic location due to GPCI adjustments. On average, Medicare pays approximately $90–$110 per visit in 2025.
Always check your local Medicare Physician Fee Schedule for exact rates.
Commercial Insurance Variations
Commercial payer reimbursement varies significantly depending on:
- Contracted rates
- Region
- Specialty
- Facility vs non-facility setting
Some commercial payers reimburse higher than Medicare for Level 3 office visits.
RVUs for CPT 99213
CPT 99213 includes:
- Work RVU
- Practice Expense RVU
- Malpractice RVU
Total RVUs typically range around 1.3–1.5, depending on updates and locality adjustments.
RVUs directly impact payment calculations under Medicare.
Frequently Asked Questions
1. What qualifies for CPT code 99213?
A visit qualifies when an established patient encounter involves low level medical decision making or 20–29 minutes of total provider time, with proper documentation.
2. Is 99213 a level 3 visit?
Yes. CPT 99213 is considered a Level 3 office visit code for established patients.
3. What is the time requirement for CPT 99213?
The CPT 99213 time requirement is 20–29 minutes total time on the date of encounter.
4. What is the difference between CPT code 99213 and 99214?
The main difference between 99213 vs 99214 lies in complexity and time:
- 99213 → Low complexity MDM, 20–29 minutes
- 99214 → Moderate complexity MDM, 30–39 minutes
99214 typically involves worsening conditions, higher risk, or more extensive data review.
Final Thoughts
Understanding how to use CPT 99213 correctly is essential for compliant billing and accurate reimbursement. By following updated 99213 billing guidelines, maintaining proper documentation, and selecting the appropriate E/M level, providers can reduce denials and optimize revenue.
