Medical Coding Covid Guidelines and Tips
The COVID-19 pandemic has created unique challenges for medical coders and billers. The healthcare industry continues to navigate the complexities of treating COVID-19 patients. As a result, coding and billing procedures have changed significantly. In particular, these changes reflect the dynamic nature of the virus and its impact on healthcare systems. Understanding the latest guidelines, tips, and best practices for medical coding Covid is critical for accurate reimbursement, compliance, and optimal care delivery.
Key Changes for Medicall Coding COVID-19
Medical coders must stay updated on the constantly evolving COVID-19-related codes. The Centers for Medicare & Medicaid Services (CMS), the American Medical Association (AMA), and other entities have issued guidance to help coders stay on track.
ICD-10-CM Diagnosis Codes:
- U07.1 – COVID-19: The code for confirmed COVID-19 cases, based on provider documentation or a positive test. However, do not assign it for symptoms alone or for suspected, probable, or possible COVID-19.
- Z20.822 – Contact with and (suspected) exposure to COVID-19: Use it when a patient had an exposure but is asymptomatic or awaiting test results.
- Z11.52 – Encounter for screening for COVID-19: Used for screening tests in patients without symptoms or known exposure.
CPT Procedure Codes:
- Coders commonly bill COVID-19 testing procedures using CPT codes 87635 (for PCR tests) and CPT code 87426 (for antigen tests).
- CPT reports each COVID-19 vaccine with a product code (for example, codes in the 91318 to 91322 range) plus administration code 90480. The older 91300 series and 0001A series codes have largely been deleted.
ICD-10-CM Codes for Post-COVID-19 Conditions:
Some codes describe COVID-19 complications, while others describe conditions after the infection:
- J12.82 – Pneumonia due to COVID-19
- M35.81 – Multisystem inflammatory syndrome
- U09.9 – Post COVID-19 condition, unspecified (code the specific condition first)
- Z86.16 – Personal history of COVID-19
COVID-19 Testing and Vaccination Codes
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COVID-19 testing is an essential part of managing COVID-19, and medical coders must ensure accurate coding of testing services. When reporting COVID-19 tests, make sure to use the appropriate CPT codes to describe the test type (e.g., molecular or antigen tests).
- Use CPT code 87635 for SARS-CoV-2 PCR testing.
- For antigen testing, you may use CPT codes 87426 and 87811.
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Vaccines have their own set of codes. Since late 2023, CPT reports each vaccine with a product specific code (for example, 91318 through 91322). In addition, report administration code 90480 for each dose. Product codes change as new formulas are released, so always check the current CPT code set.
Telemedicine & Virtual Care Billing
Due to COVID-19, telemedicine has become more widely used as a method for healthcare delivery. As of now, telehealth services are reimbursable under various payer systems, but it’s important to follow correct coding practices to ensure reimbursement.
CPT Codes for Telehealth:
- 98008-98015 – Audio-only telemedicine E/M services. These replaced telephone codes 99441-99443, which were deleted in 2025.
- 99202-99215 – Office and outpatient E/M services, which providers can also use for telehealth visits.
Remember to check payer-specific requirements. Some insurers may have unique billing rules regarding telemedicine and virtual care.
Telehealth Telehealth
COVID-19-Related Hospital & Inpatient Billing
Hospitals and inpatient providers must use the correct diagnostic and procedural codes when billing for COVID-19-related services, including treatments and care.
- Critical Care and Ventilation Services: These services require detailed coding using specific CPT and ICD-10-PCS codes.
- For example, CPT code 31500 for intubation and CPT code 99291 for critical care.
- Hospital Stay: For patients admitted with COVID-19, bill with ICD-10 codes for COVID-19 diagnosis, and include ICD-10-PCS codes for inpatient facility procedures like mechanical ventilation. Professional services, such as critical care, use CPT codes.
Medicare Specific Guidelines:
- During the COVID-19 Public Health Emergency (PHE), Medicare allowed greater flexibility in billing, including for telehealth services. However, the PHE ended on May 11, 2023. Therefore, check current CMS rules for which telehealth flexibilities still apply.
- Hospital Readmissions: Pay special attention to the rules around readmission for COVID-19 patients, as some may face additional scrutiny, particularly for potential re-infection or complications.
Modifiers for COVID-19 Billing
- Modifier CS: During the PHE, this modifier identified COVID-19 testing related services that qualified for a cost sharing waiver. As a result, it generally no longer applies to COVID-19 services after the PHE ended.
- Modifier CR: For services affected by a declared catastrophe or disaster, such as services delivered under temporary waivers or emergency measures.
CPT Modifiers CPT Medical Modifiers
Billing for COVID-19 Related Services
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Co-Pay Waivers: During the PHE, many insurers, including Medicare and Medicaid, waived patient co-pays for COVID-19 testing, vaccinations, and related services. Today, coverage of vaccines and testing varies by payer. When billing these services, waive or bill co-pays according to the payer’s requirements.
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Medicare Waivers for Emergency Services: Specific billing procedures apply to services under Medicare’s emergency waivers. Examples include extended coverage for certain outpatient services or hospital services that Medicare normally limits.
Documentation Best Practices for Medical Coding Covid
Accurate and thorough documentation is essential for ensuring that payers reimburse COVID-19-related claims correctly.
- Include specific details about COVID-19 testing, diagnosis, treatment, and any complications.
- For telehealth, make sure to document the modality of communication, the type of service provided, and the patient’s consent for telehealth services.
- Ensure that codes reflect the exact services provided, such as intubation, ventilation, ICU care, or other interventions.
Common Billing Mistakes to Avoid
- Incorrect Coding of COVID-19 Testing and Vaccination: Use the correct CPT and ICD-10 codes for COVID-19 testing and vaccination to avoid denials.
- Not Using the Correct Modifiers: Ensure that you use modifiers like CR when the payer requires them.
- Failure to Document Properly: Missing or vague documentation may lead to denials or delays in payment.
- Incorrect Use of Telehealth Codes: Be careful when billing for telehealth services to ensure you use the proper CPT or HCPCS codes.
Resources for Keeping Up-to-Date on Medical Coding Covid
The coding landscape for COVID-19 continues to change, and it’s crucial to stay updated with resources like:
- Centers for Medicare & Medicaid Services (CMS)
- American Medical Association (AMA)
- American Health Information Management Association (AHIMA)
- The Centers for Disease Control and Prevention (CDC)
- AAPC
The impact of COVID-19 on the healthcare industry has necessitated numerous updates to coding and billing practices. Medical coders and billers must follow the latest guidelines for accurate coding. They must also avoid common errors and stay compliant with payer requirements. By staying updated and adhering to these practices, healthcare providers can ensure proper reimbursement and continue delivering high-quality care in these challenging times
Coding for COVID-19 Vaccine Shots CMS: Coding Covid 19 Vaccine Shots