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D35.1
ICD-10-CM
Parathyroid Adenoma

Find comprehensive information on parathyroid adenoma diagnosis, including clinical documentation, medical coding (ICD-10 E21.0, SNOMED CT), differential diagnosis, hyperparathyroidism symptoms, calcium levels, and parathyroid hormone (PTH) blood test interpretation. Learn about parathyroid adenoma treatment options, surgery, and post-operative care. This resource provides valuable insights for healthcare professionals, medical coders, and patients seeking information on parathyroid adenoma management.

Also known as

Benign Parathyroid Neoplasm
Parathyroid Tumor

Diagnosis Snapshot

Key Facts
  • Definition : Benign tumor of the parathyroid gland, causing overproduction of parathyroid hormone.
  • Clinical Signs : High calcium levels, kidney stones, fatigue, muscle weakness, bone pain.
  • Common Settings : Outpatient endocrinology clinics, hospitals for surgical removal.

Related ICD-10 Code Ranges

Complete code families applicable to AAPC D35.1 Coding
E21.0

Primary hyperparathyroidism

Overactive parathyroid gland(s) causing high calcium levels.

E00-E89

Endocrine, nutritional and metabolic diseases

Disorders of glands, metabolism, and nutrition, including parathyroid issues.

D15.0

Benign neoplasm of parathyroid gland

Non-cancerous tumor of the parathyroid gland.

Code-Specific Guidance

Decision Tree for

Follow this step-by-step guide to choose the correct ICD-10 code.

Is the parathyroid adenoma functional (causing hyperparathyroidism)?

Code Comparison

Related Codes Comparison

When to use each related code

Description
Benign parathyroid tumor causing hyperparathyroidism
Parathyroid hyperplasia causing hyperparathyroidism
Cancerous parathyroid tumor, rare cause of hyperparathyroidism

Documentation Best Practices

Documentation Checklist
  • Elevated serum calcium: Document total and ionized levels.
  • Elevated PTH: Include specific lab values.
  • Imaging confirmation: Ultrasound, sestamibi scan, or CT.
  • Symptoms: Document bone pain, kidney stones, fatigue, etc.
  • Localization: Specify location of adenoma if identified.

Coding and Audit Risks

Common Risks
  • Incorrect Laterality Coding

    Miscoding the side (right, left, or unspecified) of the parathyroid adenoma can lead to billing errors and claim denials. Proper documentation and coding are crucial.

  • Unspecified vs. Single Adenoma

    Failing to distinguish between a single and unspecified adenoma (E21.0 vs E21.1) based on imaging and operative findings can affect reimbursement.

  • Missed Primary Hyperparathyroidism

    Overlooking the underlying diagnosis of primary hyperparathyroidism (E21.0) when coding for parathyroid adenoma can impact quality metrics and reimbursement.

Mitigation Tips

Best Practices
  • Document adenoma location, size using ICD-10-CM codes for CDI accuracy.
  • Order PTH level, calcium, imaging studies pre-op for proper HCC coding.
  • Ensure informed consent, operative report detail aligns with medical necessity.
  • Intraoperative PTH monitoring aids diagnosis confirmation, reduces compliance risks.
  • Precise pathology reporting (size, weight, features) improves coding specificity.

Clinical Decision Support

Checklist
  • Elevated serum calcium: Check >10.5 mg/dL
  • Elevated PTH: Verify intact PTH level
  • Low serum phosphorus: Confirm <2.5 mg/dL
  • 24-hour urine calcium: Assess excretion levels

Reimbursement and Quality Metrics

Impact Summary
  • Parathyroid Adenoma: Coding accuracy impacts reimbursement for parathyroidectomy (CPT 60500, 60502, 60505). Proper ICD-10-CM (E07.0) crucial for claims.
  • Hospital quality reporting: Pre-op localization studies affect reimbursement and surgical outcomes data. Accurate documentation key for performance metrics.
  • Post-operative calcium levels monitoring crucial for accurate reporting and avoiding complications, influencing hospital readmission rates.
  • Precise coding (ICD-10-CM, CPT) and documentation of adenoma size and location impacts pathology reporting, research data, and future treatment.

Streamline Your Medical Coding

Let S10.AI help you select the most accurate ICD-10 codes. Our AI-powered assistant ensures compliance and reduces coding errors.

Quick Tips

Practical Coding Tips
  • Code primary hyperparathyroidism
  • Document adenoma location, size
  • Confirm with pathology report
  • Consider imaging findings
  • Use laterality codes if applicable

Documentation Templates

Patient presents with signs and symptoms suggestive of primary hyperparathyroidism due to a suspected parathyroid adenoma.  Elevated serum calcium levels, along with elevated or inappropriately normal parathyroid hormone (PTH) levels, were noted on laboratory testing.  The patient reports symptoms including fatigue, muscle weakness, bone pain, kidney stones, and constipation.  Differential diagnosis includes other causes of hypercalcemia such as malignancy, familial hypocalciuric hypercalcemia, and other hyperparathyroidism etiologies.  Imaging studies, including sestamibi parathyroid scan and neck ultrasound, were ordered to localize the suspected adenoma.  Surgical consultation for parathyroidectomy is planned.  Preoperative evaluation including electrocardiogram and renal function assessment will be performed.  The patient was educated on the risks and benefits of surgical intervention versus medical management of primary hyperparathyroidism.  ICD-10 code E21.0, primary hyperparathyroidism, is used for diagnosis coding.  CPT codes for surgical parathyroidectomy will be determined based on the operative approach.  Postoperative follow-up will include monitoring of serum calcium and PTH levels to confirm resolution of hyperparathyroidism.  Patient education regarding potential complications such as hypocalcemia and recurrent laryngeal nerve injury was provided.  The patient verbalized understanding of the diagnosis, treatment plan, and potential complications.