2027 ICD-10-CM Diagnosis Code I97.2Postmastectomy lymphedema syndrome

ICD-10-CM Codes›I00–I99›I95-I99›I97

ICD-10-CM I97.2
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

I97.2 is a billable ICD-10-CM diagnosis code for postmastectomy lymphedema syndrome. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 600 through 601. The code is restricted by the Medicare Code Editor to adult patients (age 15 through 124). In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Postprocedural or postoperative circulatory system complication.

Code Identity

ICD-10-CM Code
I97.2
Billable Status
Yes — Valid for Submission
Code Describes
Postmastectomy lymphedema syndrome
Short Description
Postmastectomy lymphedema syndrome
Same as the full description in the CMS dataset.
Parent Code
I97
Intraoperative and postprocedural complications and disorders of circulatory system, not elsewhere classified

Code Classification

ChapterI00–I99Diseases of the circulatory system
SectionI95-I99Other and unspecified disorders of the circulatory system
CategoryI97Intraoperative and postprocedural complications and disorders of circulatory system, not elsewhere classified
This CodeI97.2Postmastectomy lymphedema syndrome

Code EditsBilling

Medicare Code Editor checks that affect claim validity for I97.2.

Adult diagnoses
The Medicare Code Editor detects inconsistencies in adult cases by checking a patient's age and any diagnosis on the patient's record. The adult code edits apply to patients age range is 15–124 years inclusive (e.g., senile delirium, mature cataract).

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Bilateral upper limb edema
  • Edema of left upper limb
  • Edema of right upper limb
  • Lymphedema of bilateral upper limbs
  • Lymphedema of left upper limb
  • Lymphedema of right upper limb
  • Lymphedema of upper limb
  • Postmastectomy lymphedema syndrome
  • Postmastectomy lymphedema syndrome of bilateral upper limbs
  • Postmastectomy lymphedema syndrome of left upper limb
  • Postmastectomy lymphedema syndrome of right upper limb
  • Postsurgical lymphedema

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to I97.2: its own notes plus those printed at I97 and Chapter 9. A note printed at a category, block or chapter applies to every code under it.

Applicable To

Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.

  • Elephantiasis due to mastectomy
  • Obliteration of lymphatic vessels

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.

From I97 Intraoperative and postprocedural complications and disorders of circulatory system, not elsewhere classified applies to 39 codes
From Chapter 9 (I00-I99) Diseases of the circulatory system applies to 1,433 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • 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)
  • systemic connective tissue disorders (M30-M36)
  • transient cerebral ischemic attacks and related syndromes (G45.-)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name I97.2, its category, or a range that includes it.

Excludes1 1

These codes carry an Excludes1 note naming I97.2: they are not reported together with it, unless the two conditions are unrelated.

  • I89.0 Lymphedema, not elsewhere classified
    postmastectomy lymphedema (I97.2)

Excludes2 1

These codes carry an Excludes2 note naming I97.2: its condition is not part of those codes, and both may be reported when the patient has both.

  • Block T80-T88 Complications of surgical and medical care, not elsewhere classified
    postmastectomy lymphedema syndrome (I97.2)

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR CIR038
Postprocedural or postoperative circulatory system complication
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Lymphedema

Lymphedema is the name of a type of swelling. It happens when lymph builds up in your body's soft tissues. Lymph is a fluid that contains white blood cells that defend against germs. It can build up when the lymph system is damaged or blocked. It usually happens in the arms or legs.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert I97.2 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
457.0 Postmastect lymphedema
Exact Match The mapping is direct, with no qualifiers.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About I97.2Overview

What is the ICD-10 code for postmastectomy lymphedema syndrome?

The ICD-10-CM code for postmastectomy lymphedema syndrome is I97.2 (sometimes written as I972). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is I97.2 a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report postmastectomy lymphedema syndrome on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does I97.2 group to?

When postmastectomy lymphedema syndrome is the principal diagnosis on an inpatient stay, it groups to MS-DRG 600, 601, with relative weights from 0.6014 to 0.9971 depending on complications. Higher weights mean higher Medicare reimbursement.

Who can I97.2 be reported for?

The Medicare Code Editor checks postmastectomy lymphedema syndrome against patient demographics: this code is intended for adult patients (age 15 through 124). Claims outside these limits are flagged as inconsistent.

What is the ICD-9 equivalent of I97.2?

Under the General Equivalence Mappings, postmastectomy lymphedema syndrome converts to ICD-9-CM 457.0 (postmastect lymphedema). The mapping is a direct match.