D49.9 – Neoplasm of unspecified behavior of unspecified site
ICD-10-CM 2027 diagnosis code · Neoplasms of unspecified behavior (D49)
ICD-10-CM code
D49.9
- Code
D49.9(claims format:D499)- Description
- Neoplasm of unspecified behavior of unspecified site
- Billable
- Yes – valid for HIPAA-covered transactions
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 2. Neoplasms (C00-D49)
- Block
- D49 Neoplasms of unspecified behavior (D49)
- Parent codes
- D49
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
D49 – Neoplasms of unspecified behavior
Includes:
- 'growth' NOS
- neoplasm NOS
- new growth NOS
- tumor NOS
Notes:
- Category D49 classifies by site neoplasms of unspecified morphology and behavior. The term 'mass', unless otherwise stated, is not to be regarded as a neoplastic growth.
Index terms for D49.9
Entries in the ICD-10-CM alphabetic index that lead to this code:
- Dermatomyositis, in
- Neuromyopathy, paraneoplastic
- Myelopathy, in, neoplastic disease
- Encephalopathy, in, neoplastic disease
- Polyneuropathy, in, neoplastic disease
- Arthropathy, in, neoplastic disease NOS
- Neuropathy, neuropathic, paraneoplastic
- Dermatopolymyositis, in neoplastic disease
- Osteitis, deformans, in, neoplastic disease
- Myasthenia, syndrome, in, neoplastic disease
- Syndrome, myasthenic, in, neoplastic disease
- Palsy, cranial nerve, multiple, in, neoplastic disease
- Ataxia, ataxy, ataxic, cerebellar, in, neoplastic disease
- Compression, nerve, root or plexus NOS, neoplastic disease
- Atrophy, atrophic, systemic affecting central nervous system, in, neoplastic disease
Related codes in D49
- D49.0 – Neoplasm of unspecified behavior of digestive systemBillable
- D49.1 – Neoplasm of unspecified behavior of respiratory systemBillable
- D49.2 – Neoplasm of unspecified behavior of bone, soft tissue, and skinBillable
- D49.3 – Neoplasm of unspecified behavior of breastBillable
- D49.4 – Neoplasm of unspecified behavior of bladderBillable
- D49.5 – Neoplasm of unspecified behavior of other genitourinary organsHeader
- D49.6 – Neoplasm of unspecified behavior of brainBillable
- D49.7 – Neoplasm of unspecified behavior of endocrine glands and other parts of nervous systemBillable
- D49.8 – Neoplasm of unspecified behavior of other specified sitesHeader
Frequently asked questions
What is ICD-10 code D49.9?
D49.9 is the ICD-10-CM code for neoplasm of unspecified behavior of unspecified site, in the block D49 (Neoplasms of unspecified behavior (D49)).
Is D49.9 a billable code?
Yes. D49.9 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does D49.9 belong to?
It belongs to category D49 – Neoplasms of unspecified behavior.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.