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E83.51
ICD-10-CM
Low Calcium

Understanding low calcium (hypocalcemia) diagnosis, symptoms, and treatment is crucial for accurate clinical documentation and medical coding. This resource provides information on calcium deficiency, serum calcium levels, ionized calcium, corrected calcium, hypocalcemia ICD-10 codes (E83.51, E83.59), differential diagnosis, laboratory tests, and treatment options for effective patient care and optimized healthcare reimbursement. Learn about calcium homeostasis, causes of hypocalcemia, and related terms like tetany, chvosteks sign, and trousseaus sign for comprehensive medical coding and clinical documentation.

Also known as

Hypocalcemia
Calcium Deficiency

Diagnosis Snapshot

Key Facts
  • Definition : A condition where blood calcium levels are below normal.
  • Clinical Signs : Muscle cramps, numbness, tingling, seizures, confusion.
  • Common Settings : Hypoparathyroidism, vitamin D deficiency, kidney disease.

Related ICD-10 Code Ranges

Complete code families applicable to AAPC E83.51 Coding
E83.51

Hypocalcemia

Deficiency of calcium in the blood.

E55

Vitamin D deficiency

Conditions related to vitamin D deficiency, which can cause hypocalcemia.

E89.5

Postoperative hypoparathyroidism

Low parathyroid hormone after surgery, often leading to low calcium.

R78.0

Hypocalcemia (finding)

Abnormal finding of low calcium, not necessarily a diagnosed condition.

Code-Specific Guidance

Decision Tree for

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

Is the low calcium due to hypoparathyroidism?

  • Yes

    Post-surgical?

  • No

    Due to malabsorption?

Code Comparison

Related Codes Comparison

When to use each related code

Description
Low Calcium (Hypocalcemia)
Hypoparathyroidism
Vitamin D Deficiency

Documentation Best Practices

Documentation Checklist
  • Document serum calcium level (mg/dL)
  • Specify total and ionized calcium if measured
  • Document symptoms (e.g., tetany, paresthesia)
  • Document underlying cause if known (e.g., hypoparathyroidism)
  • Document treatment plan (e.g., calcium supplementation)

Coding and Audit Risks

Common Risks
  • Unspecified Hypocalcemia

    Coding E83.5 (hypocalcemia) without specificity when documentation supports a more precise diagnosis like vitamin D deficiency or hypoparathyroidism leads to inaccurate severity capture.

  • Secondary Hypocalcemia

    Failing to code underlying conditions causing low calcium (e.g., chronic kidney disease, pancreatitis) misrepresents patient complexity and impacts risk adjustment.

  • Inadequate Calcium Documentation

    Insufficient clinical indicators of hypocalcemia in the chart (e.g., lab values, symptoms) may lead to coding queries or denials and missed revenue opportunities.

Mitigation Tips

Best Practices
  • Document diet, meds, supplements impacting calcium. ICD-10: E58, E83.5
  • Order ionized calcium, not just total. CDI query for albumin levels.
  • Check PTH, vitamin D for accurate diagnosis. CPT: 83000, 82306
  • Monitor ECG for prolonged QT interval. HCC coding: RAF impact
  • Treat underlying cause, not just symptoms. Compliance: CMS guidelines

Clinical Decision Support

Checklist
  • Verify serum calcium < 8.5 mg/dL (ICD-10 E83.51)
  • Check albumin level for corrected calcium (SNOMED CT 1751-7)
  • Assess symptoms: tetany, paresthesias, seizures (RxNorm)
  • Review medications: loop diuretics, bisphosphonates (AHFS DI)
  • Consider secondary causes: hypoparathyroidism, vitamin D deficiency (ICD-10)

Reimbursement and Quality Metrics

Impact Summary
  • Low Calcium (Hypocalcemia) Reimbursement: Diagnosis coding accuracy impacts payer reimbursements. Correct ICD-10 codes (E83.5) crucial for maximizing revenue.
  • Quality Metrics Impact: Low Calcium affects metrics like hospital readmissions (30-day) due to complications if unmanaged. Proper coding essential.
  • Coding Accuracy: Specific documentation of cause, severity, and treatment of hypocalcemia required for accurate E83.5 coding and optimal reimbursement.
  • Hospital Reporting: Accurate Low Calcium diagnosis data crucial for internal quality reporting, resource allocation, and performance improvement.

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Frequently Asked Questions

Common Questions and Answers

Q: What are the key differential diagnoses to consider when a patient presents with symptomatic hypocalcemia, and how can I efficiently differentiate between them?

A: Symptomatic hypocalcemia can be caused by a range of conditions, requiring a systematic approach to diagnosis. Key differential diagnoses include hypoparathyroidism (often post-surgical), vitamin D deficiency, chronic kidney disease, magnesium deficiency, and medication-induced hypocalcemia (e.g., bisphosphonates, loop diuretics). Efficient differentiation involves a thorough history, including surgical history, medication review, and dietary assessment. Laboratory investigations should include serum calcium, phosphate, magnesium, 25-hydroxyvitamin D, parathyroid hormone (PTH), creatinine, and albumin. For example, elevated PTH coupled with low calcium suggests secondary hypoparathyroidism due to causes like vitamin D deficiency or renal failure, while low PTH and low calcium point towards hypoparathyroidism. Consider implementing a diagnostic algorithm that incorporates these factors to pinpoint the underlying cause and guide appropriate management. Explore how integrating these steps can enhance your diagnostic accuracy in cases of hypocalcemia.

Q: How do I interpret low ionized calcium levels in a critically ill patient, considering the impact of albumin and pH, and what immediate management steps are crucial?

A: Interpreting low ionized calcium in critically ill patients requires careful consideration of confounding factors like albumin and pH. Hypoalbuminemia can falsely lower total calcium levels, while alkalosis increases calcium binding to albumin, reducing ionized calcium even with normal total calcium. Therefore, ionized calcium is the preferred measure in this setting. Critically low ionized calcium can manifest as tetany, seizures, and cardiac arrhythmias. Immediate management involves addressing life-threatening symptoms with intravenous calcium gluconate or calcium chloride under continuous ECG monitoring. Simultaneously, investigate and correct the underlying cause, such as sepsis, pancreatitis, or massive transfusion. Learn more about the interplay between ionized calcium, albumin, and pH in critical illness to optimize patient care. Consider implementing standardized protocols for managing acute hypocalcemia in your ICU.

Quick Tips

Practical Coding Tips
  • Code E83.51 for hypocalcemia
  • Document symptoms, severity, cause
  • Check for secondary hypocalcemia codes
  • Consider Vitamin D deficiency codes
  • Review labs for calcium levels

Documentation Templates

Patient presents with signs and symptoms suggestive of hypocalcemia.  Presenting complaints include muscle cramps, tingling sensations (paresthesia) in the extremities, and intermittent spasms.  Physical examination revealed positive Chvostek's sign and Trousseau's sign, further supporting the diagnosis of low calcium.  Laboratory results confirm hypocalcemia with a serum calcium level of [Insert Value] mgdL (normal range 8.5-10.2 mgdL).  Differential diagnosis includes hypoparathyroidism, vitamin D deficiency, and chronic kidney disease.  Patient history includes [mention relevant medical history, medications, or surgical history impacting calcium levels, e.g., recent thyroidectomy, history of malabsorption, long-term diuretic use].  Electrocardiogram (ECG) performed showed [insert ECG findings related to hypocalcemia if applicable, e.g., prolonged QT interval].  Based on the patient's presentation, laboratory findings, and clinical assessment, the diagnosis of hypocalcemia is established.  Treatment plan includes calcium supplementation with [Specify type and dosage of calcium supplement, e.g., calcium carbonate 1000mg twice daily] and addressing the underlying cause of hypocalcemia.  Patient education provided on dietary sources of calcium and vitamin D, importance of medication compliance, and potential side effects of treatment.  Follow-up appointment scheduled in [time frame] to monitor calcium levels and assess treatment response.  ICD-10 code E83.5 (hypocalcemia) is assigned.
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