🩺
1500 Claim BillingBETA
Sign In

99421-99423 CPT Codes: Patient Portal E-Visits

Last Updated: April 10, 2026

If your doctors spend hours every week answering complex medical questions via the secure patient portal (MyChart, etc.), you should be billing "E-Visits" using CPT 99421-99423.

Interactive Medical Coding Assistant

Look up CPT/HCPCS/ICD-10 rules, check NCCI bundling edits, verify Medicare LCD coverage, or check provider NPIs instantly.

2026 Medicare National Fee (99421): Non-Facility (Office): $18.85 · Facility (Hospital): $12.25

Cumulative Time Over 7 Days

Unlike standard E/M codes, E-Visits are billed based on the cumulative time spent responding to the patient over a 7-day period.

  • 99421: 5-10 minutes
  • 99422: 11-20 minutes
  • 99423: 21 or more minutes

Medical Necessity & Patient Initiation

Verify Medical Necessity

Don't risk a denial. See if your ICD-10 code is on the approved Medicare LCD list.

The E-Visit must be initiated by the patient (they messaged you first). It must involve true medical evaluation and management, not just scheduling a refill or answering a quick administrative question.

NCCI Edits

Like all digital/telehealth codes, if the portal message results in an in-person visit within 24 hours or the soonest available appointment, the time spent messaging is bundled into the in-person E/M visit.

Check Codes, NCCI Edits & Medical Necessity in Seconds

Use our free Medical Coding Assistant to lookup CPT/ICD-10 descriptions, check Medicare LCD rules, verify NPIs, or auto-fill CMS-1500 claims with AI.