D4921 Gingival irrigation per quad
Also known as: gingival irrigation, pocket irrigation, therapeutic irrigation
Gingival irrigation with therapeutic agents by quadrant to reduce inflammation and suppress periodontal pathogenic bacteria.
In Plain Language
medicinal rinsing treatment; therapeutic water irrigation
Clinical Context
Adjunctive therapeutic procedure to reduce bacterial load, inflammation, and exudate in active periodontal disease or following procedures to promote healing.
RVU Information
CPT D4921 does not have a physician work RVU assigned by CMS. This is typical for supply, drug, and equipment codes — reimbursement is based on Average Sales Price (ASP), fee schedules, or payer contracts rather than the RVU system.
Billing & Documentation
Dental codes (CDT codes) require documentation of the tooth number(s) or area treated, clinical findings, and the procedure performed. Pre-authorization may be required for major restorative, prosthodontic, and oral surgery procedures. Include radiographs when supporting medical necessity.
Specialties
Frequently Asked Questions
What is CPT code D4921?
CPT D4921 (Gingival irrigation per quad) is a D Codes (Dental) code. Gingival irrigation with therapeutic agents by quadrant to reduce inflammation and suppress periodontal pathogenic bacteria.
Is D4921 covered by dental insurance?
CPT D4921 is a dental procedure code used by Periodontology, General Dentistry. Adjunctive therapeutic procedure to reduce bacterial load, inflammation, and exudate in active periodontal disease or following procedures to promote healing. Coverage depends on your dental insurance plan.
When is CPT D4921 used?
Adjunctive therapeutic procedure to reduce bacterial load, inflammation, and exudate in active periodontal disease or following procedures to promote healing.
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CPT® is a registered trademark of the American Medical Association. Data sourced from CMS Physician Fee Schedule RVU26A. Descriptions, synonyms, and clinical context are original content by RVU Edge.