ICD-10-CM 2027 diagnosis code
M85.862Other specified disorders of bone density and structure, left lower leg
M85.862 is a valid, billable ICD-10-CM code for other specified disorders of bone density and structure, left lower leg. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.Short description: Oth disrd of bone density and structure, left lower leg
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About M85.862
M85.862 is the ICD-10-CM diagnosis code for other specified disorders of bone density and structure, left lower leg. It belongs to category M85 (other disorders of bone density and structure), block M80-M85 (disorders of bone density and structure) and chapter 13 (diseases of the musculoskeletal system and connective tissue). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.
Within M85.86 (other specified disorders of bone density and structure, lower leg), M85.862 is specifically for other specified disorders of bone density and structure, left lower leg. Related codes cover right lower leg (M85.861) and unspecified lower leg (M85.869).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 564 (Other Musculoskeletal System and Connective Tissue Diagnoses with MCC, relative weight 1.4908), DRG 565 (Other Musculoskeletal System and Connective Tissue Diagnoses with CC, relative weight 0.9783) and DRG 566 (Other Musculoskeletal System and Connective Tissue Diagnoses without CC/MCC, relative weight 0.7378), in MDC 08 (Diseases and Disorders of the Musculoskeletal System and Connective Tissue), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Before ICD-10, this condition was coded in ICD-9-CM as 733.90 (disorder of bone and cartilage, unspecified) and 733.99 (other disorders of bone and cartilage).
Notes that apply from higher levels
Instructions written at a parent level also apply to M85.862.
Broader instructions also apply from Chapter 13: Diseases of the musculoskeletal system and connective tissue.
MS-DRG v44.0 grouping
All DRGs →Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.
MDC 08 · Diseases and Disorders of the Musculoskeletal System and Connective Tissue
ICD-9-CM equivalent
Converter →- 733.90Disorder of bone and cartilage, unspecifiedapproximate
- 733.99Other disorders of bone and cartilageapproximate
From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about M85.862
Is M85.862 billable?
- Yes. M85.862 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can M85.862 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict M85.862 as a principal diagnosis.
Is M85.862 a CC or MCC?
- No. M85.862 is neither a CC nor an MCC under MS-DRG v44.0.
What DRG does M85.862 group to?
- M85.862 is used in the MS-DRG v44.0 logic for MS-DRG 564 (Other Musculoskeletal System and Connective Tissue Diagnoses with MCC), MS-DRG 565 (Other Musculoskeletal System and Connective Tissue Diagnoses with CC) and MS-DRG 566 (Other Musculoskeletal System and Connective Tissue Diagnoses without CC/MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.
What is the ICD-9 code for M85.862?
- The CMS General Equivalence Mappings map M85.862 to ICD-9-CM 733.90 and 733.99.