D0170Re-evaluation, Limited, Problem Focused

What This Code Covers

D0170 is used when a patient returns so the dentist can reassess a condition that was already diagnosed and may already be under treatment. This is not a new problem visit and it is not a routine recall. The purpose is to check on healing progress, evaluate the response to a treatment, or decide whether the current plan needs to be adjusted. For example, a patient who had a root canal two weeks ago comes back so the dentist can check whether symptoms have resolved and the area is healing properly.

Billing Guide

Bill this code when:

• The patient is returning for a follow-up visit to reassess a previously identified and documented condition
• The dentist evaluates healing progress after a procedure such as an extraction, root canal, or surgical treatment
• The visit is specifically to determine whether the existing treatment plan should continue, be modified, or be discontinued
• The problem being reassessed was diagnosed on a prior visit and documented in the patient's chart

Do not bill this code when:

• The patient presents with a new problem that was not previously diagnosed. Use D0140 for a new limited problem-focused evaluation
• The visit is a routine recall or periodic checkup. Use D0120 instead
• The follow-up care is included in the global period of a surgical procedure. Many payers bundle post-operative checks into the original surgical code
• No dentist evaluation takes place during the visit. A hygienist or assistant checking on a patient without the dentist does not qualify

Insurance and Denial Prevention

Key Payer Rules:

• Some payers bundle D0170 into the global fee for recent surgical procedures. Check whether the original procedure includes a post-operative period before billing separately
• Most commercial plans do not have a strict frequency limit on D0170, but repeated billing in a short period may trigger audits
• Medicaid programs in many states cover D0170 but may require documentation showing the visit was medically necessary and not routine follow-up care already included in a prior procedure
• A few payers do not recognize D0170 at all and may require you to bill D0140 instead. Verify with the carrier before submitting

Common Denials and How to Respond:

• Bundled with prior procedure - Review the payer's global period rules for the original procedure. If the re-evaluation falls outside the global period or addresses a complication not covered by the original code, appeal with documentation of the separate service and medical necessity.
• Duplicate of D0140 - Clarify in your appeal that this visit was to reassess a previously diagnosed condition, not to evaluate a new problem. Include the date of the original diagnosis and the treatment being monitored.
• Not medically necessary - Submit clinical notes showing the specific reason for the re-evaluation, such as persistent symptoms, unexpected healing complications, or the need to adjust the treatment plan.