M35 — Other systemic involvement of connective tissue
Is M35 billable?
No — M35 is a non-billable header code. M35 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 23 billable codes beneath M35.
Billable codes under this header
- M35.1Other overlap syndromes
- M35.2Behcet's disease
- M35.3Polymyalgia rheumatica
- M35.4Diffuse (eosinophilic) fasciitis
- M35.5Multifocal fibrosclerosis
- M35.6Relapsing panniculitis [Weber-Christian]
- M35.7Hypermobility syndrome
- M35.9Systemic involvement of connective tissue, unspecified
- M35.00Sjogren syndrome, unspecified
- M35.01Sjogren syndrome with keratoconjunctivitis
- M35.02Sjogren syndrome with lung involvement
- M35.03Sjogren syndrome with myopathy
- M35.04Sjogren syndrome with tubulo-interstitial nephropathy
- M35.05Sjogren syndrome with inflammatory arthritis
- M35.06Sjogren syndrome with peripheral nervous system involvement
- M35.07Sjogren syndrome with central nervous system involvement
- M35.08Sjogren syndrome with gastrointestinal involvement
- M35.0ASjogren syndrome with glomerular disease
- M35.0BSjogren syndrome with vasculitis
- M35.0CSjogren syndrome with dental involvement
- M35.09Sjogren syndrome with other organ involvement
- M35.81Multisystem inflammatory syndrome
- M35.89Other specified systemic involvement of connective tissue
M35 at a glance
| Code | M35 |
|---|---|
| Description | Other systemic involvement of connective tissue |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Excludes1 — never code together
The conditions below can never be reported together with M35 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- reactive perforating collagenosis (L87.1)
Excludes1 — never code together — inherited from M30-M36
The conditions below can never be reported together with M35 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- autoimmune disease, single organ or single cell-type -code to relevant condition category
Excludes2 — not included here — inherited from Chapter 13
The conditions below are not part of M35, but a patient may have both at the same time. When documentation supports it, M35 and the excluded code may both be reported.
- arthropathic psoriasis (L40.5-)
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- compartment syndrome (traumatic) (T79.A-)
- 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)
What codes fall under M35? (10)
- M35.0Sjogren syndromenot billable
- M35.1Other overlap syndromes
- M35.2Behcet's disease
- M35.3Polymyalgia rheumatica
- M35.4Diffuse (eosinophilic) fasciitis
- M35.5Multifocal fibrosclerosis
- M35.6Relapsing panniculitis [Weber-Christian]
- M35.7Hypermobility syndrome
- M35.8Other specified systemic involvement of connective tissuenot billable
- M35.9Systemic involvement of connective tissue, unspecified
How long has M35 existed?
M35 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.
Which codes are confused with M35?
ICD-10-CM declares these codes mutually exclusive with M35 — exactly one of each pair can be correct for a given encounter.