ICD10 code of Rotor syndrome and ICD9 code

Rotor syndrome is classified under the ICD-10-CM code E80.6 (other disorders of bilirubin metabolism), while in the legacy ICD-9-CM system, it was coded as 277.4 (disorders of bilirubin excretion). Because Rotor syndrome is a benign, rare condition, it does not have a unique, disease-specific code in either system, but rather shares these codes with other related metabolic conditions.

What exactly is Rotor syndrome?

Rotor syndrome is a rare, benign, autosomal recessive disorder characterized by chronic, non-hemolytic conjugated hyperbilirubinemia. Unlike more severe liver conditions, Rotor syndrome does not cause liver damage or fibrosis. The clinical hallmark of Rotor syndrome is persistent jaundice without pruritus (itching) or abnormal liver enzyme levels. The condition is caused by a combined deficiency of the organic anion transporting polypeptides OATP1B1 and OATP1B3, which are essential for the reuptake of bilirubin into liver cells.

How is Rotor syndrome diagnosed and distinguished from similar conditions?

Diagnosing Rotor syndrome often involves excluding other conditions that cause elevated bilirubin, such as Dubin-Johnson syndrome. Clinicians typically look for the following clinical features to confirm a diagnosis:

• Serum Bilirubin Levels: Total bilirubin is typically elevated in the range of 2 to 5 mg/dL, with a significant portion being conjugated (direct) bilirubin.


• Normal Liver Enzymes: Alkaline phosphatase, GGT, and aminotransferases remain within normal limits.


• Urinary Coproporphyrin Analysis: This is the gold standard for diagnosis. In Rotor syndrome, total urinary coproporphyrin excretion is markedly increased (often 2-5 times the normal limit), with a distinct pattern where coproporphyrin I and III are excreted in roughly equal amounts.


• Imaging: Unlike Dubin-Johnson syndrome, the gallbladder is typically visualized on oral cholecystography in Rotor syndrome patients, and the liver does not show the characteristic black pigmentation.

Is Rotor syndrome hereditary?

Yes, Rotor syndrome is an inherited condition. It follows an autosomal recessive pattern, meaning an individual must inherit two mutated copies of the SLCO1B1 and SLCO1B3 genes—one from each parent—to manifest the disorder. Parents of an affected child are typically asymptomatic carriers. Genetic counseling is highly recommended for families affected by Rotor syndrome to understand the 25% recurrence risk for future pregnancies.

What is the psychological impact of living with a rare diagnosis?

Receiving a diagnosis of Rotor syndrome can be confusing, especially because the term "liver disorder" often carries a heavy emotional burden. While the condition itself is harmless, the visible symptom of jaundice can cause social anxiety or self-consciousness. It is important for patients to recognize that Rotor syndrome does not impact life expectancy and requires no specific medical treatment or dietary restrictions, allowing individuals to lead full, active lives.

Next steps

• Consult a hepatologist or gastroenterologist to confirm your diagnosis via urinary coproporphyrin testing.


• Request a referral to a clinical geneticist to discuss the autosomal recessive inheritance pattern.


• Connect with the DiseaseMaps.org community to share experiences with others living with metabolic liver conditions.


• Advise your primary care physician that no treatment is necessary, as the condition is benign.

Medical disclaimer: This content is for informational purposes only and does not constitute medical advice, diagnosis, or treatment; always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.

References

• Orphanet: Rotor syndrome (ORPHA:79298)


• NIH Genetic and Rare Diseases Information Center (GARD): Rotor syndrome


• OMIM: Rotor Syndrome (Entry #237450)


• PubMed: "Rotor syndrome: A rare cause of hyperbilirubinemia" (Review of clinical literature)