L03.31A: Cellulitis of flank
L03.31A, cellulitis of flank, is listed as a covered diagnosis in 4 Medicare billing and coding articles that apply to 27 HCPCS Level II codes, including G0281 (Electrical stimulation, (unattended), to one or more…), G0329 (Electromagnetic therapy, to one or more areas for chronic…), C8900 (Magnetic resonance angiography with contrast, abdomen). The articles come from 4 Medicare contractors. A listed diagnosis supports medical necessity only; coverage still depends on the LCD's criteria and on documentation in the medical record.
HCPCS Level II codes with L03.31A as a covered diagnosis
| Code | Description | Medicare coverage | DMEPOS fee 2026 (state range) | Articles listing it |
|---|---|---|---|---|
| G0281 | Electrical stimulation, (unattended), to one or more areas, for chronic stage iii and stage iv pressure ulcers, arterial ulcers, diabetic ulcers, and venous stasis ulcers not demonstrating measurable signs of healing after 30 days of conventional care, as part of a therapy plan of care | Carrier judgment | — | 2 |
| G0329 | Electromagnetic therapy, to one or more areas for chronic stage iii and stage iv pressure ulcers, arterial ulcers, diabetic ulcers and venous stasis ulcers not demonstrating measurable signs of healing after 30 days of conventional care as part of a therapy plan of care | Carrier judgment | — | 2 |
| C8900 | Magnetic resonance angiography with contrast, abdomen | Special coverage instructions apply | — | 1 |
| C8901 | Magnetic resonance angiography without contrast, abdomen | Special coverage instructions apply | — | 1 |
| C8902 | Magnetic resonance angiography without contrast followed by with contrast, abdomen | Special coverage instructions apply | — | 1 |
| C8909 | Magnetic resonance angiography with contrast, chest (excluding myocardium) | Special coverage instructions apply | — | 1 |
| C8910 | Magnetic resonance angiography without contrast, chest (excluding myocardium) | Special coverage instructions apply | — | 1 |
| C8911 | Magnetic resonance angiography without contrast followed by with contrast, chest (excluding myocardium) | Special coverage instructions apply | — | 1 |
| C8912 | Magnetic resonance angiography with contrast, lower extremity | Special coverage instructions apply | — | 1 |
| C8913 | Magnetic resonance angiography without contrast, lower extremity | Special coverage instructions apply | — | 1 |
| C8914 | Magnetic resonance angiography without contrast followed by with contrast, lower extremity | Special coverage instructions apply | — | 1 |
| C8918 | Magnetic resonance angiography with contrast, pelvis | Special coverage instructions apply | — | 1 |
| C8919 | Magnetic resonance angiography without contrast, pelvis | Special coverage instructions apply | — | 1 |
| C8920 | Magnetic resonance angiography without contrast followed by with contrast, pelvis | Special coverage instructions apply | — | 1 |
| C8931 | Magnetic resonance angiography with contrast, spinal canal and contents | Special coverage instructions apply | — | 1 |
| C8932 | Magnetic resonance angiography without contrast, spinal canal and contents | Special coverage instructions apply | — | 1 |
| C8933 | Magnetic resonance angiography without contrast followed by with contrast, spinal canal and contents | Special coverage instructions apply | — | 1 |
| C8934 | Magnetic resonance angiography with contrast, upper extremity | Special coverage instructions apply | — | 1 |
| C8935 | Magnetic resonance angiography without contrast, upper extremity | Special coverage instructions apply | — | 1 |
| C8936 | Magnetic resonance angiography without contrast followed by with contrast, upper extremity | Special coverage instructions apply | — | 1 |
| A9585 | Injection, gadobutrol, 0.1 ml | Carrier judgment | — | 1 |
| Q9953 | Injection, iron-based magnetic resonance contrast agent, per ml | Special coverage instructions apply | — | 1 |
| G0283 | Electrical stimulation (unattended), to one or more areas for indication(s) other than wound care, as part of a therapy plan of care | Carrier judgment | — | 1 |
| G2010 | Remote evaluation of recorded video and/or images submitted by an established patient (e.g., store and forward), including interpretation with follow-up with the patient within 24 business hours, not originating from a related e/m service provided within the previous 7 days nor leading to an e/m service or procedure within the next 24 hours or soonest available appointment | Carrier judgment | — | 1 |
| G2250 | Remote assessment of recorded video and/or images submitted by an established patient (e.g., store and forward), including interpretation with follow-up with the patient within 24 business hours, not originating from a related service provided within the previous 7 days nor leading to a service or procedure within the next 24 hours or soonest available appointment | Carrier judgment | — | 1 |
2 more codes are listed. See every code with payment by region in Caduvo.
Medicare policy articles listing L03.31A
- A56775: Billing and Coding: Magnetic Resonance Angiography (Palmetto GBA (MAC - Part A, MAC - Part B); 18 Level II codes). LCD with the same title: L34424
- A55909: Billing and Coding: Wound Care (WPS Insurance Corporation (MAC - Part A, MAC - Part B); 2 Level II codes). LCD with the same title: L35125, L37166, L37228
- A57206: Billing and Coding: Lumbar MRI (Noridian Healthcare Solutions, LLC (MAC - Part A, MAC - Part B); 2 Level II codes). LCD with the same title: L34220
- A57311: Billing and Coding: Physical Therapy - Home Health (CGS Administrators, LLC (HHH MAC); 7 Level II codes). LCD with the same title: L33942
A diagnosis listed as covered in a billing and coding article supports medical necessity for the article's codes; it does not guarantee payment. Coverage depends on the LCD's criteria, the contractor's jurisdiction and documentation in the medical record.
Other L03 diagnoses (Cellulitis and acute lymphangitis)
- L03.311 — Cellulitis of abdominal wall
- L03.312 — Cellulitis of back [any part except buttock]
- L03.314 — Cellulitis of groin
- L03.315 — Cellulitis of perineum
- L03.316 — Cellulitis of umbilicus
- L03.317 — Cellulitis of buttock
- L03.321 — Acute lymphangitis of abdominal wall
- L03.322 — Acute lymphangitis of back [any part except buttock]
- L03.323 — Acute lymphangitis of chest wall
- L03.324 — Acute lymphangitis of groin
- L03.325 — Acute lymphangitis of perineum
- L03.326 — Acute lymphangitis of umbilicus
- L03.327 — Acute lymphangitis of buttock
- L03.32A — Acute lymphangitis of flank
- L03.011 — Cellulitis of right finger
- L03.012 — Cellulitis of left finger
- L03.021 — Acute lymphangitis of right finger
- L03.022 — Acute lymphangitis of left finger
- L03.031 — Cellulitis of right toe
- L03.032 — Cellulitis of left toe
- L03.041 — Acute lymphangitis of right toe
- L03.042 — Acute lymphangitis of left toe
- L03.111 — Cellulitis of right axilla
- L03.112 — Cellulitis of left axilla
- L03.113 — Cellulitis of right upper limb
- L03.114 — Cellulitis of left upper limb
- L03.115 — Cellulitis of right lower limb
- L03.116 — Cellulitis of left lower limb
- L03.121 — Acute lymphangitis of right axilla
- L03.122 — Acute lymphangitis of left axilla
Frequently asked questions
Does Medicare cover L03.31A (Cellulitis of flank)?
Medicare covers items and services, not diagnoses. 4 Medicare billing and coding articles list L03.31A as a covered diagnosis for 27 HCPCS Level II codes: the diagnosis can support medical necessity for those codes, but payment still depends on the LCD's coverage criteria and the medical record.
Which HCPCS codes can be billed with ICD-10 L03.31A?
The Level II codes from the policies most specific to this diagnosis are G0281 (Electrical stimulation, (unattended), to one or more…, 2 articles); G0329 (Electromagnetic therapy, to one or more areas for chronic…, 2 articles); C8900 (Magnetic resonance angiography with contrast, abdomen, 1 article); C8901 (Magnetic resonance angiography without contrast, abdomen, 1 article); C8902 (Magnetic resonance angiography without contrast followed…, 1 article). Code choice depends on the item supplied; check each code's descriptor.
Which Medicare policy articles list L03.31A?
A56775 (Billing and Coding: Magnetic Resonance Angiography); A55909 (Billing and Coding: Wound Care); A57206 (Billing and Coding: Lumbar MRI), and 1 more article.
What is ICD-10-CM code L03.31A?
L03.31A is the ICD-10-CM code for cellulitis of flank, in category L03 (Cellulitis and acute lymphangitis), chapter 12: Diseases of the skin and subcutaneous tissue.
Next steps
- Run a reimbursement report for a device billed under G0281
- Watch G0281 for fee, coverage and descriptor changes
- Build a full Medicare revenue model for G0281
Sources: CMS Medicare Coverage Database billing and coding articles (covered ICD-10 code lists and HCPCS links); ICD-10-CM FY2026; CMS HCPCS Level II release October 2026; CMS DMEPOS fee schedule 2026 (non-rural state fees). Not billing or legal advice.
Chapter 12: Diseases of the skin and subcutaneous tissue · All diagnoses · HCPCS lookup