What K04 covers · when clinicians use it
ICD-10 code K04 identifies Diseases of pulp and periapical tissues in the U.S. ICD-10-CM clinical and billing record set. It sits within the Digestive System chapter (K00–K95), the section that groups related diagnoses so providers, payers, and public-health agencies report them consistently. Clinicians and medical coders apply K04 when an encounter's findings match the Diseases of pulp and periapical tissues description, attaching it to the patient record so downstream insurance claims, payer audits, quality reporting, and epidemiological surveillance all reference the same standardized diagnosis. The ICD-10-CM is maintained by the Centers for Medicare & Medicaid Services and the CDC's National Center for Health Statistics, with an updated official code set released each U.S. fiscal year — always verify K04 against the current CMS/CDC release and your payer's documentation guidance before final use. This page summarizes documentation context for K04 and is a coding reference, not clinical, diagnostic, or billing advice.
K04 refers to Diseases of pulp and periapical tissues, a category of dental and oral conditions affecting the teeth, gums, oral mucosa, salivary glands, or tongue. These disorders may cause pain, swelling, functional impairment, and complications if untreated.
Symptoms
- Tooth pain or sensitivity – Often seen in K02 (caries) or K04 (pulpitis)
- Swelling or gum bleeding – Common in K05 (gingivitis or periodontitis)
- Delayed or abnormal tooth eruption – Found in K00 and K01 cases
- Oral lesions or ulcers – Noted in K12 (stomatitis) and K13 (mucosal diseases)
- Dry mouth or salivary gland enlargement – Seen in K11 disorders
- Difficulty chewing or speaking – Possible with K14 (tongue diseases)
Diagnosis
Diagnosis of Diseases of pulp and periapical tissues involves oral examination, dental X-rays, probing for gum pockets, biopsy (in mucosal or tongue lesions), and saliva analysis. Early detection and preventive dental care are critical to avoid complications or tooth loss.
ICD10 Code Usage
ICD10 code K04 is used by dentists, oral surgeons, periodontists, and general practitioners for clinical documentation, treatment planning, dental insurance claims, and electronic health records in both primary and specialized dental care settings.
Related Codes
- K00 – Disorders of tooth development and eruption
- K01 – Embedded and impacted teeth
- K02 – Dental caries
- K03 – Other diseases of hard tissues of teeth
- K05 – Gingivitis and periodontal diseases
- K06 – Other disorders of gingiva and edentulous alveolar ridge
- K08 – Other disorders of teeth and supporting structures
- K09 – Cysts of oral region, not elsewhere classified
- K11 – Diseases of salivary glands
- K12 – Stomatitis and related lesions
- K13 – Other diseases of lip and oral mucosa
- K14 – Diseases of tongue
FAQs
Q1: What is ICD10 code K04?
A: It refers to Diseases of pulp and periapical tissues, involving abnormalities in the development, structure, or health of teeth, gums, or the oral cavity.
Q2: What’s the difference between K02 and K03?
A: K02 refers specifically to tooth decay (caries), while K03 covers other hard tissue issues like enamel wear, erosion, and dentin sensitivity.
Q3: Are K05 and K06 similar?
A: Both address gum issues; K05 is for inflammatory conditions like gingivitis and periodontitis, while K06 includes structural anomalies or alveolar ridge issues in edentulous areas.
Q4: How are salivary gland diseases (K11) diagnosed?
A: Through clinical palpation, ultrasound, sialography, and sometimes biopsy or imaging like MRI if tumors are suspected.
Q5: Who treats these disorders?
A: Dentists, periodontists, endodontists, oral surgeons, and ENT specialists depending on the site and severity of the issue.
Conclusion
ICD10 code K04 ensures accurate diagnosis and management of Diseases of pulp and periapical tissues, enabling appropriate treatment, preventive care, and insurance documentation across all levels of dental and oral healthcare.