ICD-10-CM Code M13.0

Polyarthritis, unspecified

Version 2020 Billable Code

Valid for Submission

M13.0 is a billable code used to specify a medical diagnosis of polyarthritis, unspecified. The code is valid for the year 2020 for the submission of HIPAA-covered transactions. The ICD-10-CM code M13.0 might also be used to specify conditions or terms like acute polyarthritis, arthropathy of multiple joints, camptodactyly, arthropathy, coxa-vara, pericarditis syndrome, dilated cardiomyopathy secondary to polyarteritis nodosa, polyarthritis associated with another disorder, polyarthritis associated with another disorder, etc

Short Description:Polyarthritis, unspecified
Long Description:Polyarthritis, unspecified

Index to Diseases and Injuries

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code M13.0 are found in the index:


The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Acute polyarthritis
  • Arthropathy of multiple joints
  • Camptodactyly, arthropathy, coxa-vara, pericarditis syndrome
  • Dilated cardiomyopathy secondary to polyarteritis nodosa
  • Polyarthritis associated with another disorder
  • Polyarthritis associated with another disorder
  • Polyarthritis associated with hemochromatosis
  • Polyarthropathy
  • Polyarthropathy associated with another disorder
  • Polyarthropathy associated with another disorder
  • Undifferentiated inflammatory arthritis
  • Undifferentiated inflammatory polyarthritis

Clinical Information

  • ARTHRITIS-. acute or chronic inflammation of joints.
  • ARTHRITIS JUVENILE-. arthritis in children with onset before 16 years of age. the terms juvenile rheumatoid arthritis jra and juvenile idiopathic arthritis jia refer to classification systems for chronic arthritis in children. only one subtype of juvenile arthritis polyarticular onset rheumatoid factor positive clinically resembles adult rheumatoid arthritis and is considered its childhood equivalent.
  • RHEUMATIC FEVER-. a febrile disease occurring as a delayed sequela of infections with streptococcus pyogenes. it is characterized by multiple focal inflammatory lesions of the connective tissue structures such as the heart blood vessels and joints polyarthritis and brain and by the presence of aschoff bodies in the myocardium and skin.

Diagnostic Related Groups

The ICD-10 code M13.0 is grouped in the following groups for version MS-DRG V37.0 What are Diagnostic Related Groups?
The Diagnostic Related Groups (DRGs) are a patient classification scheme which provides a means of relating the type of patients a hospital treats. The DRGs divides all possible principal diagnoses into mutually exclusive principal diagnosis areas referred to as Major Diagnostic Categories (MDC).
applicable from 10/01/2019 through 09/30/2020.


Convert M13.0 to ICD-9

  • 716.50 - Polyarthritis NOS-unspec (Approximate Flag)

Code Classification

  • Diseases of the musculoskeletal system and connective tissue (M00–M99)
    • Inflammatory polyarthropathies (M05-M14)
      • Other arthritis (M13)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (First year ICD-10-CM implemented into the HIPAA code set)
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020

Information for Patients


If you feel pain and stiffness in your body or have trouble moving around, you might have arthritis. Most kinds of arthritis cause pain and swelling in your joints. Joints are places where two bones meet, such as your elbow or knee. Over time, a swollen joint can become severely damaged. Some kinds of arthritis can also cause problems in your organs, such as your eyes or skin.

Types of arthritis include

  • Osteoarthritis is the most common type of arthritis. It's often related to aging or to an injury.
  • Autoimmune arthritis happens when your body's immune system attacks healthy cells in your body by mistake. Rheumatoid arthritis is the most common form of this kind of arthritis.
  • Juvenile arthritis is a type of arthritis that happens in children.
  • Infectious arthritis is an infection that has spread from another part of the body to the joint.
  • Psoriatic arthritis affects people with psoriasis.
  • Gout is a painful type of arthritis that happens when too much uric acid builds up in the body. It often starts in the big toe.

NIH: National Institute of Arthritis and Musculoskeletal and Skin Diseases

[Learn More]