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ICD-10-CM 2027 diagnosis code

I97.2Postmastectomy lymphedema syndrome

✓ Billable / specificAdult · age 15–124

I97.2 is a valid, billable ICD-10-CM code for postmastectomy lymphedema syndrome. 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 I97.2

I97.2 is the ICD-10-CM diagnosis code for Postmastectomy lymphedema syndrome. It belongs to category I97 (intraoperative and postprocedural complications and disorders of circulatory system, not elsewhere classified), block I95-I99 (other and unspecified disorders of the circulatory system) and chapter 9 (diseases of the circulatory system). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within I97 (intraoperative and postprocedural complications and disorders of circulatory system, not elsewhere classified), I97.2 is specifically for Postmastectomy lymphedema syndrome. Related codes cover Postcardiotomy syndrome (I97.0), other postprocedural cardiac functional disturbances (I97.1), postprocedural hypertension (I97.3), intraoperative hemorrhage and hematoma of a circulatory system organ or structure complicating a procedure (I97.4), accidental puncture and laceration of a circulatory system organ or structure during a procedure (I97.5), postprocedural hemorrhage, hematoma and seroma of a circulatory system organ or structure following a procedure (I97.6), intraoperative cardiac functional disturbances (I97.7) and other intraoperative and postprocedural complications and disorders of the circulatory system, not elsewhere classified (I97.8).

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 600 (Non-Malignant Breast Disorders with CC/MCC, relative weight 0.9975) and DRG 601 (Non-Malignant Breast Disorders without CC/MCC, relative weight 0.6017), in MDC 09 (Diseases and Disorders of the Skin, Subcutaneous Tissue and Breast), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

The Medicare Code Editor expects this diagnosis only for patients age 15 through 124.

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 457.0 (Postmastectomy lymphedema syndrome).

Coding notes

Applicable toConditions and synonyms classified to this code
  • Elephantiasis due to mastectomy
  • Obliteration of lymphatic vessels

Notes that apply from higher levels

Instructions written at a parent level also apply to I97.2.

› From I97 Intraoperative and postprocedural complications and disorders of circulatory system, not elsewhere classified
Excludes2

Broader instructions also apply from Chapter 9: Diseases of the circulatory system.

Alphabetic index entries

13 entries

Terms in the official ICD-10-CM index that lead to I97.2.

Codes whose notes reference I97.2

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 09 · Diseases and Disorders of the Skin, Subcutaneous Tissue and Breast

ICD-9-CM equivalent

Converter →
  • 457.0Postmastectomy lymphedema syndromeexact

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 I97.2

Is I97.2 billable?

Yes. I97.2 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can I97.2 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict I97.2 as a principal diagnosis.

Is I97.2 a CC or MCC?

No. I97.2 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does I97.2 group to?

I97.2 is used in the MS-DRG v44.0 logic for MS-DRG 600 (Non-Malignant Breast Disorders with CC/MCC) and MS-DRG 601 (Non-Malignant Breast Disorders 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 I97.2?

The CMS General Equivalence Mappings map I97.2 to ICD-9-CM 457.0.