ICD-10-CM 2027 diagnosis code
M01.X71Direct infection of right ankle and foot in infectious and parasitic diseases classified elsewhere
M01.X71 is a valid, billable ICD-10-CM code for direct infection of right ankle and foot in infectious and parasitic diseases classified elsewhere. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.Short description: Dir infct of right ank/ft in infec/parastc dis classd elswhr
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 M01.X71
M01.X71 is the ICD-10-CM diagnosis code for direct infection of right ankle and foot in infectious and parasitic diseases classified elsewhere. It belongs to category M01 (direct infections of joint in infectious and parasitic diseases classified elsewhere), block M00-M02 (infectious arthropathies) 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 M01.X7 (direct infection of ankle and foot in infectious and parasitic diseases classified elsewhere), M01.X71 is specifically for direct infection of right ankle and foot in infectious and parasitic diseases classified elsewhere. Related codes cover left ankle and foot in infectious and parasitic diseases classified elsewhere (M01.X72) and unspecified ankle and foot in infectious and parasitic diseases classified elsewhere (M01.X79).
Code first underlying disease, such as: leprosy [Hansen's disease] (A30.-), mycoses (B35-B49), O'nyong-nyong fever (A92.1) and paratyphoid fever (A01.1-A01.4).
As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.
In MS-DRG v44.0, it is part of the grouping logic for DRG 548 (Septic Arthritis with MCC, relative weight 1.9519), DRG 549 (Septic Arthritis with CC, relative weight 1.1435) and DRG 550 (Septic Arthritis without CC/MCC, relative weight 0.8591), 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 is a manifestation code, so it describes the effect of an underlying disease and can't be the principal diagnosis. Code the underlying condition first.
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 711.47 (arthropathy associated with other bacterial diseases, ankle and foot), 711.57 (arthropathy associated with other viral diseases, ankle and foot), 711.67 (arthropathy associated with mycoses, ankle and foot) and 2 more.
Notes that apply from higher levels
Instructions written at a parent level also apply to M01.X71.
› From M01 Direct infections of joint in infectious and parasitic diseases classified elsewhere
- arthropathy in Lyme disease (A69.23)
- gonococcal arthritis (A54.42)
- meningococcal arthritis (A39.83)
- mumps arthritis (B26.85)
- postinfective arthropathy (M02.-)
- postmeningococcal arthritis (A39.84)
- reactive arthritis (M02.3)
- rubella arthritis (B06.82)
- sarcoidosis arthritis (D86.86)
- typhoid fever arthritis (A01.04)
- tuberculosis arthritis (A18.01-A18.02)
Broader instructions also apply from M00-M02 Infectious arthropathies and 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 →- 711.47Arthropathy associated with other bacterial diseases, ankle and footapproximate
- 711.57Arthropathy associated with other viral diseases, ankle and footapproximate
- 711.67Arthropathy associated with mycoses, ankle and footapproximate
- 711.77Arthropathy associated with helminthiasis, ankle and footapproximate
- 711.87Arthropathy associated with other infectious and parasitic diseases, ankle and footapproximate
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 M01.X71
Is M01.X71 billable?
- Yes. M01.X71 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can M01.X71 be used as a principal diagnosis?
- No. It is a manifestation code, so it describes the effect of an underlying disease and can't be the principal diagnosis. Code the underlying condition first.
Is M01.X71 a CC or MCC?
- M01.X71 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.
What DRG does M01.X71 group to?
- M01.X71 is used in the MS-DRG v44.0 logic for MS-DRG 548 (Septic Arthritis with MCC), MS-DRG 549 (Septic Arthritis with CC) and MS-DRG 550 (Septic Arthritis 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 M01.X71?
- The CMS General Equivalence Mappings map M01.X71 to ICD-9-CM 711.47, 711.57, 711.67, 711.77 and 1 more.