Patient who has had no medical care for many years is seen today and diagnosed

Patient who has had no medical care for many years is

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Patient who has had no medical care for many years is seen today and diagnosed with carcinomatosis C80.0 Disseminated malignant neoplasm, unspecified Explanation : Carcinomatosis NOS is an “includes” note under this code. Should seldom be used but is available for use in cases such as this.
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Chapter 2. Neoplasms ICD-10-CM 2017 Chapter 2. Neoplasms Guidelines and Examples ICD-10-CM 2017 435 k. Malignant neoplasm without specification of site Code C80.1, Malignant (primary) neoplasm, unspecified, equates to Cancer, unspecified. This code should only be used when no determination can be made as to the primary site of a malignancy. This code should rarely be used in the inpatient setting. l. Sequencing of neoplasm codes 1) Encounter for treatment of primary malignancy If the reason for the encounter is for treatment of a primary malignancy, assign the malignancy as the principal/first-listed diagnosis. The primary site is to be sequenced first, followed by any metastatic sites. 2) Encounter for treatment of secondary malignancy When an encounter is for a primary malignancy with metastasis and treatment is directed toward the metastatic (secondary) site(s) only, the metastatic site(s) is designated as the principal/first-listed diagnosis. The primary malignancy is coded as an additional code. 3) Malignant neoplasm in a pregnant patient When a pregnant woman has a malignant neoplasm, a code from subcategory O9A.1-, Malignant neoplasm complicating pregnancy, childbirth, and the puerperium, should be sequenced first, followed by the appropriate code from Chapter 2 to indicate the type of neoplasm. 4) Encounter for complication associated with a neoplasm When an encounter is for management of a complication associated with a neoplasm, such as dehydration, and the treatment is only for the complication, the complication is coded first, followed by the appropriate code(s) for the neoplasm. The exception to this guideline is anemia. When the admission/encounter is for management of an anemia associated with the malignancy, and the treatment is only for anemia, the appropriate code for the malignancy is sequenced as the principal or first-listed diagnosis followed by code D63.0, Anemia in neoplastic disease. 5) Complication from surgical procedure for treatment of a neoplasm When an encounter is for treatment of a complication resulting from a surgical procedure performed for the treatment of the neoplasm, designate the complication as the principal/first-listed diagnosis. See guideline regarding the coding of a current malignancy versus personal history to determine if the code for the neoplasm should also be assigned. 6) Pathologic fracture due to a neoplasm When an encounter is for a pathological fracture due to a neoplasm, and the focus of treatment is the fracture, a code from subcategory M84.5, Pathological fracture in neoplastic disease, should be sequenced first, followed by the code for the neoplasm.
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