2027 ICD-10-CM Diagnosis Code M1A.1720Lead-induced chronic gout, left ankle and foot, without tophus (tophi)
ICD-10-CM Codes›M00–M99›M05-M14›M1A
- Billable — Valid for Submission
- 7th Character 0 — Without Tophus (tophi)
- Chronic Condition
M1A.1720 is a billable ICD-10-CM diagnosis code for lead-induced chronic gout, left ankle and foot, without tophus (tophi). The 7th character 0 means without tophus (tophi). It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 917 through 918. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Gout.
Code Identity
Code Classification
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to M1A.1720: its own notes plus those printed at M1A.1, M1A, block M00-M25, and Chapter 13. A note printed at a category, block or chapter applies to every code under it.
Includes
Further defines, or gives examples of, the content of the category.
- Disorders affecting predominantly peripheral (limb) joints
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
- arthropathic psoriasis (L40.5-)
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- compartment syndrome (traumatic) (T79.A-)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Code First
The underlying condition named in the note is sequenced before this code.
Use Additional Code
Add a second code, after this one, to fully describe the condition.
- 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)
Notes
General instructions on how these codes are used.
- Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition
7th Character
Every code in the category takes a 7th character from the listed values, with the placeholder X filling any empty positions before it.
- The appropriate 7th character is to be added to each code from category M1A
- 0without tophus (tophi) this code
- 1with tophus (tophi)
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name M1A.1720, its category, or a range that includes it.
Excludes1 2
These codes carry an Excludes1 note naming M1A.1720: they are not reported together with it, unless the two conditions are unrelated.
Excludes2 2
These codes carry an Excludes2 note naming M1A.1720: its condition is not part of those codes, and both may be reported when the patient has both.
Code First 5
These codes say to code first a condition named in the note, and M1A.1720 is one of the conditions named.
- G99.0 Autonomic neuropathy in diseases classified elsewheregout (M1A.-, M10.-) names M1A.-, which includes this code
- H22 Disorders of iris and ciliary body in diseases classified elsewheregout (M1A.-, M10.-) names M1A.-, which includes this code
- H62.8 Other disorders of external ear in diseases classified elsewheregout (M1A.-, M10.-) names M1A.-, which includes this code
- N08 Glomerular disorders in diseases classified elsewheregout (M1A.-, M10.-) names M1A.-, which includes this code
- N22 Calculus of urinary tract in diseases classified elsewheregout (M1A.-, M10.-) names M1A.-, which includes this code
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Gout
Gout is a common type of inflammatory arthritis. It causes pain, swelling, and redness in one or more joints. It usually happens as a flare, which can last for a week or two and then gets better. The flares often begin in your big toe or a lower limb.
The full article covers:
- What is gout?
- What causes gout?
- Who is more likely to develop gout?
- What are the symptoms of gout?
- How is gout diagnosed?
- What are the treatments for gout?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert M1A.1720 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About M1A.1720Overview
What is the ICD-10 code for lead-induced chronic gout, left ankle and foot, without tophus (tophi)?
The ICD-10-CM code for lead-induced chronic gout, left ankle and foot, without tophus (tophi) is M1A.1720 (sometimes written as M1A1720). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is M1A.1720 (Lead-induced chronic gout, left ankle and foot) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report lead-induced chronic gout, left ankle and foot, without tophus (tophi) on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What does the 7th character 0 in M1A.1720 mean?
The final character 0 means without tophus (tophi), in this case for the lead-induced chronic gout, left ankle and foot. It comes from the 7th character list in the CMS Tabular List for this category.
What MS-DRG does M1A.1720 group to?
When lead-induced chronic gout, left ankle and foot, without tophus (tophi) is the principal diagnosis on an inpatient stay, it groups to MS-DRG 918, 917, with relative weights from 0.8716 to 1.5698 depending on complications. Higher weights mean higher Medicare reimbursement.
Can M1A.1720 be reported with a code from M10?
Not as a rule. The Excludes1 note at M1A, which applies to M1A.1720, lists "gout NOS (M10.-)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).
