ICD10 code of McCune Albright and ICD9 code

The International Classification of Diseases (ICD) codes for McCune Albright syndrome are Q78.1 for ICD-10 and 756.59 for ICD-9. These codes are essential for medical documentation, insurance billing, and tracking the clinical progression of McCune Albright syndrome in health registries.

What exactly is McCune Albright syndrome?

McCune Albright syndrome is a rare, complex genetic disorder characterized by the triad of polyostotic fibrous dysplasia (abnormal bone growth), café-au-lait skin pigmentation, and hyperfunctioning endocrine glands. Because McCune Albright syndrome results from a post-zygotic somatic mutation in the GNAS gene, symptoms vary widely depending on which tissues are affected. At DiseaseMaps.org, 62 people with McCune Albright syndrome have joined our community, reflecting the diverse ways this condition presents across different age groups and clinical manifestations.

How is McCune Albright syndrome diagnosed and coded?

Diagnosis of McCune Albright syndrome is primarily clinical, based on the presence of at least two of the three classic features mentioned above. When physicians submit claims or update electronic health records, they utilize the ICD-10 code Q78.1, which specifically denotes "Polyostotic fibrous dysplasia." Historically, the ICD-9 code 756.59 was used to categorize this condition under "Other specified osteodysplasias." Accurate coding is vital not only for reimbursement but for ensuring that patients with McCune Albright syndrome receive coordinated care across multiple specialties, including endocrinology, orthopedics, and dermatology.

What are the primary clinical features of McCune Albright syndrome?

The clinical spectrum of McCune Albright syndrome is broad, and management requires a multidisciplinary approach. Common manifestations include:

• Polyostotic fibrous dysplasia: Areas of bone are replaced by fibrous tissue, which can lead to fractures, deformities, and pain.


• Endocrine hyperfunction: This includes precocious puberty (most common), hyperthyroidism, growth hormone excess, and Cushing syndrome.


• Café-au-lait macules: These pigmented skin lesions often have irregular "coast of Maine" borders and are frequently present at birth.


• Skeletal complications: Recurrent fractures and progressive limb length discrepancies are common in patients with significant bone involvement.

Is McCune Albright syndrome inherited?

A critical point for families to understand is that McCune Albright syndrome is not inherited. Because the mutation occurs after fertilization (somatic mutation), it cannot be passed from parent to child. The severity of McCune Albright syndrome depends entirely on the timing and distribution of the affected cells during fetal development. Genetic counseling is highly recommended for families to discuss the nature of somatic mutations and to provide reassurance that the condition will not recur in future siblings.

Next steps

• Consult a specialist: Seek evaluation from an endocrinologist experienced in rare bone and hormonal disorders to manage the systemic effects of McCune Albright syndrome.


• Monitor bone health: Establish a relationship with an orthopedic surgeon who specializes in fibrous dysplasia to manage skeletal risks.


• Join the community: Connect with the 62 members on DiseaseMaps.org who share lived experiences with McCune Albright syndrome to find peer support and shared resources.


• Stay informed: Register with the NIH Genetic and Rare Diseases Information Center (GARD) to receive updates on clinical trials and research advancements.

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

References

• NIH Genetic and Rare Diseases Information Center (GARD): McCune-Albright Syndrome


• Orphanet: Rare Disease Database (ORPHA:560)


• OMIM (Online Mendelian Inheritance in Man): McCune-Albright Syndrome (#174800)


• Fibrous Dysplasia Foundation: Patient Education and Resources