2026 ICD-10-CM Diagnosis Code M36.1Arthropathy in neoplastic disease
ICD-10-CM Codes›M00–M99›M30-M36›M36
- Billable — Valid for Submission
- Chronic Condition
M36.1 is a billable ICD-10-CM diagnosis code for arthropathy in neoplastic disease. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 553 through 554. The code is a manifestation code that cannot be reported as the principal diagnosis. Coders also document this condition as arthritis secondary to hematological malignancy. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Conditions due to neoplasm or the treatment of neoplasm and Other specified joint disorders.
Code Identity
Code Classification
Code EditsBilling
Medicare Code Editor checks that affect claim validity for M36.1.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Arthritis secondary to hematological malignancy
- Arthritis secondary to malignancy
- Arthritis secondary to non-hematological malignancy
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Code First
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Joint Disorders
Your joints are places where two or more bones come together. Your shoulders, elbows, hips, knees, and knuckles are all joints. Your spine has joints, too.
The full article covers:
- What are joints?
- What are joint disorders?
- What diseases can affect the joints?
- What types of joint disorders happen from sudden injuries?
- What types of joint disorders happen from overuse?
- How can I keep my joints healthy?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert M36.1 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About M36.1Overview
Is M36.1 a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report arthropathy in neoplastic disease on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does M36.1 group to?
On inpatient claims, arthropathy in neoplastic disease maps to MS-DRG 553, 554, with relative weights from 0.8301 to 1.2963 depending on complications. Higher weights mean higher Medicare reimbursement.
Can M36.1 be a principal diagnosis?
No. This is a manifestation code: arthropathy in neoplastic disease describes the manifestation of an underlying disease rather than the disease itself, so the underlying condition is sequenced first.
What is the ICD-9 equivalent of M36.1?
Under the General Equivalence Mappings, arthropathy in neoplastic disease converts to ICD-9-CM 713.8 (arthrop w oth dis NEC). The mapping is approximate, so confirm the match fits the documentation.
Footnotes
[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:
- The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
- The condition places limitations on self-care, independent living, and social interactions.
