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ICD-10-CM 2027 diagnosis code

M99.82Other biomechanical lesions of thoracic region

✓ Billable / specific

M99.82 is a valid, billable ICD-10-CM code for other biomechanical lesions of thoracic region. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

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 M99.82

M99.82 is the ICD-10-CM diagnosis code for other biomechanical lesions of thoracic region. It belongs to category M99 (biomechanical lesions, not elsewhere classified), block M99 (biomechanical lesions, not elsewhere classified) 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 M99.8 (other biomechanical lesions), M99.82 is specifically for other biomechanical lesions of thoracic region. Related codes cover of head region (M99.80), of cervical region (M99.81), of lumbar region (M99.83), of sacral region (M99.84), of pelvic region (M99.85), of lower extremity (M99.86), of upper extremity (M99.87), of rib cage (M99.88) and 1 more.

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 738.3 (acquired deformity of chest and rib).

Notes that apply from higher levels

Instructions written at a parent level also apply to M99.82.

› From M99 Biomechanical lesions, not elsewhere classified
Note
  • This category should not be used if the condition can be classified elsewhere.

Broader instructions also apply from Chapter 13: Diseases of the musculoskeletal system and connective tissue.

Alphabetic index entries

2 entries

Terms in the official ICD-10-CM index that lead to M99.82.

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.

ICD-9-CM equivalent

Converter →
  • 738.3Acquired deformity of chest and ribapproximate

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about M99.82

Is M99.82 billable?

Yes. M99.82 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can M99.82 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict M99.82 as a principal diagnosis.

Is M99.82 a CC or MCC?

No. M99.82 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does M99.82 group to?

M99.82 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 M99.82?

The CMS General Equivalence Mappings map M99.82 to ICD-9-CM 738.3.