M1A.2720 vs M1A.2721
M1A.2720 (Drug-induced chronic gout, left ankle and foot, without tophus (tophi)) compared with M1A.2721 (Drug-induced chronic gout, left ankle and foot, with tophus (tophi)), from the official CMS tabular data.
Summary
No tabular note links these codes. Both belong to category M1A, and nothing in the tabular list prevents reporting each when it is documented.
Registry fact- What is different?
Title wording.The titles differ in one word, “without” (M1A.2720) versus “with” (M1A.2721): M1A.2720 is “Drug-induced chronic gout, left ankle and foot, without tophus (tophi)”; M1A.2721 is “Drug-induced chronic gout, left ankle and foot, with tophus (tophi)”.
Registry fact
- Can these codes be reported together?
No instruction prevents it.No note in either entry names the other. Both belong to category M1A; each may be reported when its own documentation is present.
Registry fact
- Is there an Excludes1 relationship?
None.Neither entry carries an Excludes1 note that names the other code. M1A.2720 carries 1 Excludes1 note and M1A.2721 carries 1 Excludes1 note covering other codes; the side-by-side table quotes them.
Official rule
- Is there an Excludes2 relationship?
None.Neither entry carries an Excludes2 note that names the other code. M1A.2720 carries 1 Excludes2 note and M1A.2721 carries 1 Excludes2 note covering other codes; the side-by-side table quotes them.
Official rule
- Is one more specific?
No.Neither is a subdivision of the other, and neither title is the unspecified form; they describe different conditions within category M1A.
Registry fact
- Is one a parent or header code?
No.Both are billable codes, and neither contains the other.
Registry fact
- Are there sequencing instructions?
None.Neither entry carries a Code First or Use Additional Code note that names the other.
Official rule
- Are there other coding relationships?
None found.No laterality, encounter-phase, Table of Neoplasms, Table of Drugs and Chemicals, or history-versus-active-disease relationship links these codes.
MedCoder-derived
Official rule: a tabular instructional note or a section of the ICD-10-CM Official Guidelines, quoted as published. Registry fact: the codes’ own published attributes (titles, billable status, position in the hierarchy, code set). MedCoder-derived: a reading MedCoder computes from those facts; it is not itself a rule. How to read the labels
Can these codes be reported together?
Yes, when each is documented. M1A.2720 and M1A.2721 both belong to category M1A.
No Excludes1/Excludes2 relationship exists between these codes in the official tabular list. The code titles state what each one covers, and the documentation decides which applies.
Side by side
| M1A.2720Drug-induced chronic gout, left ankle and foot, without tophus (tophi) | M1A.2721Drug-induced chronic gout, left ankle and foot, with tophus (tophi) | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | M00-M99 — Diseases of the Musculoskeletal System and Connective Tissue (M00-M99) | M00-M99 — Diseases of the Musculoskeletal System and Connective Tissue (M00-M99) |
| Definition | Drug-induced chronic gout, left ankle and foot, without tophus (tophi) is a billable ICD-10-CM diagnosis code (M1A.2720). | Drug-induced chronic gout, left ankle and foot, with tophus (tophi) is a billable ICD-10-CM diagnosis code (M1A.2721). |
| 7th character | The appropriate 7th character is to be added to each code from category M1A | The appropriate 7th character is to be added to each code from category M1A |
| Excludes1 | gout NOS (M10.-) | gout NOS (M10.-) |
| Excludes2 | acute gout (M10.-) | acute gout (M10.-) |
| Use additional code | code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5) code to identify: Autonomic neuropathy in diseases classified elsewhere (G99.0) | code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5) code to identify: Autonomic neuropathy in diseases classified elsewhere (G99.0) |
Notes are the code’s own tabular entry, quoted as published. A note that names the other code is the one the verdict above rests on.
Derived from the official CMS ICD-10-CM tabular data (FY2027). A coding-rule comparison, not billing advice: payer-specific edits and medical-necessity policy are outside its scope. All data sources