340Multiple sclerosis
- Legacy / Not Valid for Submission
- Replaced October 1, 2015
340 is a legacy ICD-9-CM diagnosis code for multiple sclerosis. It was valid on U.S. claims through September 30, 2015 and cannot be reported for services on or after October 1, 2015, when ICD-10-CM replaced the ICD-9 code set. Under the CMS General Equivalence Mappings, its ICD-10-CM replacement is G35 (Multiple sclerosis), flagged as a direct match.
Code Identity
Convert 340 to ICD-10-CM
Based on the final CMS General Equivalence Mappings (GEMs), 340 crosswalks to the following ICD-10-CM code.
Index of Diseases References
Entries in the final ICD-9-CM Index to Diseases and Injuries that point to 340. Tap the icons for the official index conventions.
- Adenocarcinoma M8140 3 SEE ALSO Neoplasm by site malignant
- follicular M8330 3
- and papillary M8340 3 193
- papillary M8260 3
- and follicular M8340 3 193
- follicular M8330 3
- Carcinoma M8010 3 SEE ALSO Neoplasm by site malignant
- follicular M8330 3
- and papillary mixed M8340 3 193
- papillary M8050 3
- and follicular mixed M8340 3 193
- follicular M8330 3
- Dementia 294.20
- Demyelination demyelinization
- global 340
- Diabetes diabetic brittle congenital familial mellitus severe slight without complication 250.0
- Disease diseased SEE ALSO Syndrome
- demyelinating demyelinizating brain stem central nervous system 341.9
- multiple sclerosis 340
- Skevas Zerfus 989.5
- demyelinating demyelinizating brain stem central nervous system 341.9
- Myelosclerosis 289.89
- disseminated of nervous system 340
- Psychosis 298.9
- Sclerose en plaques 340
- Sclerosis sclerotic
- ascending multiple 340
- brain general lobular 348.89
- disseminated 340
- insular 340
- miliary 340
- multiple 340
- bulbar progressive 340
- cerebrospinal 340
- disseminated 340
- multiple 340
- combined spinal cord SEE ALSO Degeneration combined
- multiple 340
- disseminated 340
- dorsal 340
- insular 340
- pancreas 251.8
- multiple brain stem cerebral generalized spinal cord 340
- plaques 340
- spinal cord general progressive transverse 336.8
- combined SEE ALSO Degeneration combined
- multiple 340
- disseminated 340
- multiple 340
- combined SEE ALSO Degeneration combined
Information for Patients
Multiple Sclerosis
Multiple sclerosis (MS) is a nervous system disease that affects your brain and spinal cord. It damages the myelin sheath, the material that surrounds and protects your nerve cells. This damage slows down or blocks messages between your brain and your body, leading to the symptoms of MS. They can include:
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Questions About 340
Is 340 (multiple sclerosis) still a valid code?
No. This code belonged to ICD-9-CM, which the United States retired after September 30, 2015. Claims with dates of service on or after October 1, 2015 must use ICD-10-CM codes, such as its replacement G35.
What is the ICD-10 replacement for 340?
The General Equivalence Mappings crosswalk this code directly to ICD-10-CM G35 (Multiple sclerosis), a one-to-one match.
What did 340 mean?
In the final ICD-9-CM release, this code described multiple sclerosis. It sat in block 340 Multiple sclerosis under Diseases of the nervous system (320–359).
