Is M35.6 a billable ICD-10-CM code?

Yes. M35.6 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does M35.6 sit in the tabular list?

Diseases of the musculoskeletal system and connective tissue (M00-M99), in the block Systemic connective tissue disorders (M30-M36).

What cannot be coded together with M35.6?

M35.6 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above M35.6 (M35) and apply to it just the same.

M35.6

M35.6 — Relapsing panniculitis [Weber-Christian]

Billable / specific codeICD-10-CM

M35.6 is a billable, specific ICD-10-CM code for relapsing panniculitis [weber-christian]. It is valid for submission on a claim.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

lupus panniculitis (L93.2)
panniculitis NOS (M79.3-)

Excludes1 inherited from the categories above M35.6

These are not written on M35.6, but they bind it: a note on a category applies to every code beneath it. Billing M35.6 with anything listed here is a denial.

Written on M35 — Other systemic involvement of connective tissue

reactive perforating collagenosis (L87.1)

Other codes that can never be billed with M35.6

These codes carry an Excludes1 note pointing at M35.6. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading M35.6 alone.

L95Vasculitis limited to skin, not elsewhere classified
M54.0Panniculitis affecting regions of neck and back
M79.3Panniculitis, unspecified

Risk adjustment

M35.6 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Medicare coverage

M35.6 is named in 8 Medicare coverage policies — 1 listing it as supporting medical necessity, and 7 listing it as NOT covered. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A58865Billing and Coding: Amniotic and Placental-Derived Product Injections and/or Applications for Musculoskeletal Indications, Non-Woundnot covered
A58883Billing and Coding: Amniotic and Placental-Derived Product Injections and/or Applications for Musculoskeletal Indications, Non-Woundnot covered
A58893Billing and Coding: Amniotic and Placental-Derived Product Injections and/or Applications for Musculoskeletal Indications, Non-Woundnot covered
A59374Billing and Coding: Amniotic and Placental-Derived Product Injections and/or Applications for Musculoskeletal Indications, Non-Woundnot covered

How M35.6 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to M35.6.

Christian-Weber disease
Weber-Christian disease
Panniculitis›relapsing

Code history

M35.6 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Related codes at this level

Codes that share M35. If M35.6 is not quite right, the correct code is usually one of these.

Questions about M35.6

Is M35.6 a billable ICD-10-CM code?: Yes. M35.6 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does M35.6 sit in the tabular list?: Diseases of the musculoskeletal system and connective tissue (M00-M99), in the block Systemic connective tissue disorders (M30-M36).
What cannot be coded together with M35.6?: M35.6 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above M35.6 (M35) and apply to it just the same.