M49.87 identifies a spondylopathy of the lumbosacral region that arises as a manifestation of an underlying disease classified elsewhere in ICD-10-CM — the spinal condition is secondary, not primary.
Verified May 8, 2026 · 5 sources ↓
- Status
- Billable
- Chapter
- 13
- Related CPT
- 11
- Region
- Spine
Documentation tips
What should appear in the chart to support M49.87.
Source · Editorial brief grounded in 5 cited references ↓
- Document the underlying disease by name (e.g., tuberculosis of the spine, diabetic spondylopathy) so the etiology code can be sequenced first — M49.87 cannot stand alone.
- Specify 'lumbosacral' explicitly in the note; 'lower lumbar' or 'L5-S1' alone may be interpreted as lumbar (M49.86) rather than lumbosacral.
- Record imaging findings (MRI, plain film) that confirm structural spinal involvement at the lumbosacral junction, including any vertebral endplate changes, disc space loss, or erosion attributable to the systemic condition.
- Note the clinical relationship between the underlying disease and the spinal findings — payers may challenge M49.87 if the causal link to the primary condition is not stated.
- If multiple spinal regions are affected, document each region separately; M49.89 covers multiple sites but requires explicit multi-region documentation to justify it over a single-site code.
Related CPT procedures
Procedure codes commonly billed with M49.87. Linking the right diagnosis to the right procedure is what establishes medical necessity.
Source · CMS LCDs · AAOS specialty guidance · claims-pattern analysis
Common coding pitfalls
The recurring mistakes coders make with M49.87 and adjacent codes.
Source · Editorial brief grounded in CDC ICD-10-CM tabular guidance, AAOS coding references, and cited references ↓
- Sequencing M49.87 as the principal diagnosis — it is a manifestation code and must be preceded by the etiology code for the underlying disease.
- Using M49.87 when documentation supports only the lumbar region (L1–L5); that maps to M49.86, not M49.87.
- Defaulting to M49.80 (site unspecified) when the operative or imaging report clearly identifies the lumbosacral junction — unspecified site codes invite audit scrutiny and underpay the clinical picture.
- Confusing M49.87 with M48.8X7 (other specified spondylopathies, lumbosacral) — M49.87 is reserved for spondylopathy that is a manifestation of a disease coded in another chapter; M48.8X7 is used for other specified spondylopathies not tied to a separate underlying etiology.
- Omitting the MCC code for the underlying systemic disease, which can drop the encounter from DRG 551 to DRG 552 and reduce facility payment.
Clinical context
Source · Editorial summary grounded in 5 cited references ↓
M49.87 is a manifestation code, meaning the lumbosacral spondylopathy it describes is a downstream effect of another condition — such as tuberculosis, brucellosis, diabetes, or another systemic disease already coded elsewhere. Per ICD-10-CM sequencing rules, code the underlying disease first; M49.87 follows as the manifestation. Never use it as a standalone primary diagnosis.
The lumbosacral region covered by M49.87 spans the junction of L5 and S1, distinct from the purely lumbar region (M49.86) and the sacral/sacrococcygeal region (M49.88). If documentation specifies lumbar without sacral involvement, use M49.86. If it spans both lumbar and sacral segments, M49.87 is the correct site assignment. Site precision is required — M49.80 (unspecified) is a last resort when the record genuinely fails to identify the region.
MS-DRG v43.0 groups M49.87 into DRG 551 (Medical back problems with MCC) or DRG 552 (Medical back problems without MCC), so accurate MCC capture alongside the underlying disease code directly affects facility reimbursement weight. Confirm that the underlying disease is also coded and that it qualifies as an MCC where applicable.
Sibling codes
Other billable codes under M49.8 (laterality / anatomic variants).
Frequently asked questions
Source · Generated from the editorial pipeline, verified against 5 cited references ↓
01Can M49.87 be the only diagnosis code on a claim?
02What is the difference between M49.86 and M49.87?
03Which DRGs does M49.87 group into under MS-DRG v43.0?
04Is M49.87 appropriate for degenerative disc disease of the lumbosacral spine?
05What underlying diseases most commonly pair with M49.87?
06Has M49.87 changed in the FY2026 ICD-10-CM update?
07When should M49.89 (multiple sites) be used instead of M49.87?
Sources & references
Editorial content was developed using the following public sources. Last verified May 8, 2026.
- 01CDC ICD-10-CM Tabular List 2026 (effective October 1, 2025)
- 02icd10data.comhttps://www.icd10data.com/ICD10CM/Codes/M00-M99/M45-M49/M49-/M49.87
- 03aapc.comhttps://www.aapc.com/codes/icd-10-codes/M49.87
- 04findacode.comhttps://www.findacode.com/icd-10-cm/icd-10-cm-diagnosis-codes-M49-group.html
- 05cdc.govhttps://www.cdc.gov/nchs/icd/icd-10-cm/index.html
Mira Scribe
Mira's AI scribe captures the treating provider's explicit statement of the underlying systemic disease causing the lumbosacral spinal involvement, the anatomic level (lumbosacral junction / L5-S1), and any supporting imaging findings such as vertebral endplate erosion or disc space narrowing. This ensures the etiology code is available for first-position sequencing and prevents a manifestation-only claim submission that payers will reject or downcode.
See how Mira captures M49.87 documentation