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ICD-10-CM Codes
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M00-M99
Diseases of the musculoskeletal system and connective tissue
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M05-M1A
Inflammatory polyarthropathies
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M1A-
Chronic gout
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2021 ICD-10-CM Diagnosis Code M1A
2021 ICD-10-CM Diagnosis Code M1A
Chronic gout
2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
- M1A should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
- The 2021 edition of ICD-10-CM M1A became effective on October 1, 2020.
- This is the American ICD-10-CM version of M1A - other international versions of ICD-10 M1A may differ.
Use AdditionalUse Additional Help
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation. In most cases the manifestation codes will have in the code title, "in diseases classified elsewhere." Codes with this title are a component of the etiology/manifestation convention. The code title indicates that it is a manifestation code. "In diseases classified elsewhere" codes are never permitted to be used as first listed or principle diagnosis codes. They must be used in conjunction with an underlying condition code and they must be listed following the underlying condition.
- code to identify:
- Autonomic neuropathy in diseases classified elsewhere (
ICD-10-CM Diagnosis Code G99.0
Autonomic neuropathy in diseases classified elsewhere
2016 2017 2018 2019 2020 2021 Billable/Specific Code Manifestation Code
Type 1 Excludes- diabetic autonomic neuropathy (E08-E13 with .43)
G99.0) - Calculus of urinary tract in diseases classified elsewhere (
ICD-10-CM Diagnosis Code N22
Calculus of urinary tract in diseases classified elsewhere
2016 2017 2018 2019 2020 2021 Billable/Specific Code Manifestation Code
N22) - Cardiomyopathy in diseases classified elsewhere (
ICD-10-CM Diagnosis Code I43
Cardiomyopathy in diseases classified elsewhere
2016 2017 2018 2019 2020 2021 Billable/Specific Code Manifestation Code
I43) - Disorders of external ear in diseases classified elsewhere (
ICD-10-CM Diagnosis Code H61.1
Noninfective disorders of pinna
2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
H61.1-, ICD-10-CM Diagnosis Code H62.8
Other disorders of external ear in diseases classified elsewhere
2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
H62.8-) - Disorders of iris and ciliary body in diseases classified elsewhere (
ICD-10-CM Diagnosis Code H22
Disorders of iris and ciliary body in diseases classified elsewhere
2016 2017 2018 2019 2020 2021 Billable/Specific Code Manifestation Code
H22) - Glomerular disorders in diseases classified elsewhere (
ICD-10-CM Diagnosis Code N08
Glomerular disorders in diseases classified elsewhere
2016 2017 2018 2019 2020 2021 Billable/Specific Code Manifestation Code
Applicable To- Glomerulonephritis
- Nephritis
- Nephropathy
Type 1 Excludes- glomerulonephritis, nephritis and nephropathy (in):
- antiglomerular basement membrane disease (M31.0)
- diabetes (E08-E13 with .21)
- gonococcal (A54.21)
- Goodpasture's syndrome (M31.0)
- hemolytic-uremic syndrome (D59.3)
- lupus (M32.14)
- mumps (B26.83)
- syphilis (A52.75)
- systemic lupus erythematosus (M32.14)
- Wegener's granulomatosis (M31.31)
- pyelonephritis in diseases classified elsewhere (N16)
- renal tubulo-interstitial disorders classified elsewhere (N16)
N08)
Type 1 ExcludesType 1 Excludes Help
A type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as M1A. A type 1 excludes note is for used for when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Type 2 ExcludesType 2 Excludes Help
A type 2 excludes note represents "not included here". A type 2 excludes note indicates that the condition excluded is not part of the condition it is excluded from but a patient may have both conditions at the same time. When a type 2 excludes note appears under a code it is acceptable to use both the code (M1A) and the excluded code together.
The following code(s) above
M1A contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
- Applicable To annotations, or
- Code Also annotations, or
- Code First annotations, or
- Excludes1 annotations, or
- Excludes2 annotations, or
- Includes annotations, or
- Note annotations, or
- Use Additional annotations
that may be applicable to
M1A:
Code History
- 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
- 2017 (effective 10/1/2016): No change
- 2018 (effective 10/1/2017): No change
- 2019 (effective 10/1/2018): No change
- 2020 (effective 10/1/2019): No change
- 2021 (effective 10/1/2020): No change
Code annotations containing back-references to M1A:
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Code First: N08, N22, G99.0, H22, H62.8
ICD-10-CM Diagnosis Code N08
Glomerular disorders in diseases classified elsewhere
2016 2017 2018 2019 2020 2021 Billable/Specific Code Manifestation Code
Applicable To- Glomerulonephritis
- Nephritis
- Nephropathy
Type 1 Excludes- glomerulonephritis, nephritis and nephropathy (in):
- antiglomerular basement membrane disease (M31.0)
- diabetes (E08-E13 with .21)
- gonococcal (A54.21)
- Goodpasture's syndrome (M31.0)
- hemolytic-uremic syndrome (D59.3)
- lupus (M32.14)
- mumps (B26.83)
- syphilis (A52.75)
- systemic lupus erythematosus (M32.14)
- Wegener's granulomatosis (M31.31)
- pyelonephritis in diseases classified elsewhere (N16)
- renal tubulo-interstitial disorders classified elsewhere (N16)
ICD-10-CM Diagnosis Code N22
Calculus of urinary tract in diseases classified elsewhere
2016 2017 2018 2019 2020 2021 Billable/Specific Code Manifestation Code
ICD-10-CM Diagnosis Code G99.0
Autonomic neuropathy in diseases classified elsewhere
2016 2017 2018 2019 2020 2021 Billable/Specific Code Manifestation Code
Type 1 Excludes- diabetic autonomic neuropathy (E08-E13 with .43)
ICD-10-CM Diagnosis Code H22
Disorders of iris and ciliary body in diseases classified elsewhere
2016 2017 2018 2019 2020 2021 Billable/Specific Code Manifestation Code
ICD-10-CM Diagnosis Code H62.8
Other disorders of external ear in diseases classified elsewhere
2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
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Type 1 Excludes: E72, E79
ICD-10-CM Diagnosis Code E72
Other disorders of amino-acid metabolism
2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
Type 1 Excludes- disorders of:
- aromatic amino-acid metabolism (E70.-)
- branched-chain amino-acid metabolism (E71.0-E71.2)
- fatty-acid metabolism (E71.3)
- purine and pyrimidine metabolism (E79.-)
- gout (M1A.-, M10.-)
ICD-10-CM Diagnosis Code E79
Disorders of purine and pyrimidine metabolism
2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
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Type 2 Excludes: M10, H61.1
ICD-10-CM Diagnosis Code M10
Gout
2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
Applicable To- Acute gout
- Gout attack
- Gout flare
- Podagra
Use Additional- code to identify:
- Autonomic neuropathy in diseases classified elsewhere (G99.0)
- Calculus of urinary tract in diseases classified elsewhere (N22)
- Cardiomyopathy in diseases classified elsewhere (I43)
- Disorders of external ear in diseases classified elsewhere (H61.1-, H62.8-)
- Disorders of iris and ciliary body in diseases classified elsewhere (H22)
- Glomerular disorders in diseases classified elsewhere (N08)
ICD-10-CM Diagnosis Code H61.1
Noninfective disorders of pinna
2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
ICD-10-CM Codes Adjacent To M1A
M08.961 Juvenile arthritis, unspecified, right knee
M08.962 Juvenile arthritis, unspecified, left knee
M08.969 Juvenile arthritis, unspecified, unspecified knee
M08.97 Juvenile arthritis, unspecified, ankle and foot
M08.971 Juvenile arthritis, unspecified, right ankle and foot
M08.972 Juvenile arthritis, unspecified, left ankle and foot
M08.979 Juvenile arthritis, unspecified, unspecified ankle and foot
M08.9A …… other specified site
M1A
Chronic gout
M1A.0 Idiopathic chronic gout
M1A.00 Idiopathic chronic gout, unspecified site
M1A.01 Idiopathic chronic gout, shoulder
M1A.011 Idiopathic chronic gout, right shoulder
M1A.012 Idiopathic chronic gout, left shoulder
Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.