What is ICD-10 code E88.2?

E88.2 is the ICD-10-CM diagnosis code for Lipomatosis, not elsewhere classified. It belongs to the ICD-10-CM chapter for endocrine, nutritional and metabolic diseases (e00-e89). E88.2 is a billable code, meaning it can be reported on a claim as a primary or secondary diagnosis when supported by documentation. E88.2 is part of the FY2026 ICD-10-CM code set published by the CMS National Center for Health Statistics and used on Medicare, Medicaid, and commercial claims in the United States.

Yes. E88.2 is a billable ICD-10-CM code that can be reported on professional and institutional claims as a primary or secondary diagnosis when the provider documentation supports the specific condition described. Billable codes in ICD-10-CM are coded to the highest level of specificity available for the documented diagnosis. E88.2 is current for fiscal year 2026 and remains in the active CMS ICD-10-CM code set published by the National Center for Health Statistics.

What is the V28 vs V24 difference for E88.2?

E88.2 does not map to a payment HCC under either the CMS-HCC V28 risk adjustment model or the older V24 model. V28 reached 100% phase-in for payment year 2026, replacing V24 which was used during the PY2024–PY2025 transition. Because neither model rewards E88.2 with a risk adjustment factor, it contributes zero to a Medicare Advantage beneficiary's RAF score in either version. Coders should check whether provider documentation supports a more specific child code that does map to a payment HCC.

What should coders know when reporting E88.2?

Verify that the lipomatosis is not related to a more specific condition (such as Madelung's disease or familial lipomatosis) before assigning this 'not elsewhere classified' code Document the anatomical location of the lipomatosis in the medical record, as this information may be relevant for clinical management even though the ICD-10 code itself doesn't require a location specifier

E88.2 ICD-10 Code: Lipomatosis, not elsewhere

ICD-10-CM Code View

HCC Buddy Code Card

Digital ICD-10 code-book layout with official code detail, always-visible risk models, Code Trumping, and Buddy coding guidance.

Code lookupE88.2Effective periodFY2026 Apr Update (Apr 1-Sep 30)

FY 2026 Apr update / Endocrine, nutritional and metabolic diseases (E00-E89) / Metabolic disorders (E70-E88)

E88.2

Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidance

Lipomatosis, not elsewhere classified

Lipomatosis is a condition where abnormal fatty tissue growths develop in the body, not caused by obesity. These benign fat deposits can occur in various locations and may cause discomfort or functional problems depending on their size and location.

Buddy Insight

Lipomatosis refers to diffuse or infiltrative lipomatous growths that are distinct from simple lipomas.

CMS-HCC V28

Not risk-adjusted for this model/period.

RAF 0

CMS-HCC V24

Not risk-adjusted for this model/period.

RAF 0

ACA/HHS

Not risk-adjusted for this model/period.

RAF 0

ESRD/PACE

Not risk-adjusted for this model/period.

RAF 0

RXHCC

Mapped

HCC 47

Disorders of Fatty-Acid and L...

RAF 0.0

Code Trumping

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Code Book Path

Official

E88Other and unspecified metabolic disorders

E88.2Lipomatosis, not elsewhere classified

Inclusion Terms

Official

Lipomatosis NOS
Lipomatosis (Check) dolorosa [Dercum]

Excludes 2

Official

ICD-10-CM does not list Excludes 2 notes for E88.2 in this effective period.

Related Child Codes

Official

E88.0Disorders of plasma-protein metabolism, not elsewhere classified

E88.1Lipodystrophy, not elsewhere classified

E88.3Tumor lysis syndrome

E88.4Mitochondrial metabolism disorders

E88.8Other specified metabolic disorders

Includes

Official

ICD-10-CM does not list Includes notes for E88.2 in this effective period.

Excludes 1

Official

histiocytosis X (chronic) (C96.6)

Code First

Official

ICD-10-CM does not list Code First sequencing instructions for E88.2 in this effective period.

Use Additional

Official

codes for associated conditions

Code Also

Official

ICD-10-CM does not list Code Also instructions for E88.2 in this effective period.

Buddy Documentation Tip

HCC Buddy guidance

Specific type of lipomatosis documented (Dercum disease, Madelung disease, pelvic lipomatosis)

Distribution and extent of lipomatous involvement

Associated symptoms (pain, functional impairment, compression of structures)

Imaging findings confirming diffuse lipomatosis rather than isolated lipomas

MEAT Support

HCC Buddy guidance

Specific type of lipomatosis documented (Dercum disease, Madelung disease, pelvic lipomatosis)

Distribution and extent of lipomatous involvement

Associated symptoms (pain, functional impairment, compression of structures)

Imaging findings confirming diffuse lipomatosis rather than isolated lipomas

Audit Caution

HCC Buddy guidance

Coding isolated lipomas (benign neoplasms) with this metabolic disorder code

Confusing lipomatosis (excess fat) with lipodystrophy (loss of fat)

Not documenting the specific type of lipomatosis for clinical accuracy

Using this code for generalized obesity — lipomatosis is a distinct condition

Common Mistakes

HCC Buddy guidance

D17.9 — Benign lipomatous neoplasm, unspecified: for isolated lipomas, not diffuse lipomatosis

D17.0-D17.7 — Benign lipomatous neoplasm of specific sites: discrete lipomas by location

E88.1 — Lipodystrophy, not elsewhere classified: loss of adipose tissue, opposite of lipomatosis

E65 — Localized adiposity: focal fat deposits without the metabolic disorder component

Last updated: FY2026 ICD-10-CM Apr update, Apr 1, 2026 through Sep 30, 2026. CMS-HCC V28 is 100% phased in for payment year 2026.

Is E88.2 an HCC code?

No. E88.2 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.

HCC Category Mapping

RxHCCHCC 47, Disorders of Fatty-Acid and Lipid Metabolism

0.000

RAF weights shown are the community, non-dual, aged base weights from the CMS risk adjustment model file. Actual per-patient RAF contribution depends on member segment, interactions, and the model year used by the payer. V28 is the CMS-HCC model phased in over payment years 2024–2026; V24 remains in use during the transition and for historical data.

MEAT Criteria for E88.2

For E88.2to count as a valid HCC diagnosis in a given encounter, the provider's documentation must show MEAT: Monitor, Evaluate, Assess, or Treat. A diagnosis from a prior year does not carry forward automatically, it has to be re-documented and supported each calendar year.

MMonitor: signs, symptoms, disease progression, or lab trending documented in the note
EEvaluate: test results, medication response, or physical findings reviewed by the provider
AAssess: explicit mention in the assessment or plan with acknowledgment of status
TTreat: medication, referral, procedure, therapy, or counseling tied to the diagnosis

Only one of M/E/A/T is required to support the code, but the documentation must be specific enough to show that the provider actually addressed E88.2 during that encounter, not just copy-forwarded from a problem list.

What This Code Means

E88.2 is the ICD-10-CM diagnosis code for lipomatosis, not elsewhere classified. Lipomatosis is a condition where abnormal fatty tissue growths develop in the body, not caused by obesity. These benign fat deposits can occur in various locations and may cause discomfort or functional problems depending on their size and location. E88.2 sits in the ICD-10-CM chapter for endocrine, nutritional and metabolic diseases (e00-e89), within the section covering metabolic disorders (e70-e88).

E88.2 is a billable ICD-10-CM code but does not map to a payment HCC under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can be reported on Medicare Advantage encounter data submissions but it does not contribute to a beneficiary's RAF score and therefore does not affect risk-adjusted payments to the plan.

This code does NOT map to a CMS-HCC under V24 or V28 models. It maps only to RxHCC 47. No direct RAF score impact for Medicare Advantage risk adjustment. Coders reviewing E88.2 should check whether additional documentation would support a more specific child code in the same hierarchy that does map to a payment HCC, capturing the correct specificity is the highest-impact RAF improvement available within accurate coding.

HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for E88.2 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.

Coding Tips

•Verify that the lipomatosis is not related to a more specific condition (such as Madelung's disease or familial lipomatosis) before assigning this 'not elsewhere classified' code
•Document the anatomical location of the lipomatosis in the medical record, as this information may be relevant for clinical management even though the ICD-10 code itself doesn't require a location specifier

Clinical Significance

Lipomatosis refers to diffuse or infiltrative lipomatous growths that are distinct from simple lipomas. This includes conditions like Dercum disease (adiposis dolorosa), multiple symmetric lipomatosis (Madelung disease), and other diffuse lipomatous conditions causing pain, functional impairment, or disfigurement.

Documentation Requirements

✓Specific type of lipomatosis documented (Dercum disease, Madelung disease, pelvic lipomatosis)
✓Distribution and extent of lipomatous involvement
✓Associated symptoms (pain, functional impairment, compression of structures)
✓Imaging findings confirming diffuse lipomatosis rather than isolated lipomas
✓Treatment plan (pain management, surgical debulking if applicable)

Commonly Confused Codes

•D17.9: Benign lipomatous neoplasm, unspecified: for isolated lipomas, not diffuse lipomatosis
•D17.0-D17.7: Benign lipomatous neoplasm of specific sites: discrete lipomas by location
•E88.1: Lipodystrophy, not elsewhere classified: loss of adipose tissue, opposite of lipomatosis
•E65: Localized adiposity: focal fat deposits without the metabolic disorder component