ICD-10 Code M47.892: Spondylosis, Other Region (Sacral and Sacrococcygeal)

Key Takeaways

ICD-10 Code M47.898 (Other spondylosis, sacral and sacrococcygeal region) is a fully billable ICD-10-CM diagnosis code valid for the 2026 fiscal year.

M47.898 captures degenerative spinal changes at the sacrum and coccyx without specifying myelopathy or radiculopathy, distinguishing it from M47.818 and M47.28.

Documentation must confirm the anatomical region and the absence or presence of neurological involvement before selecting among M47.898, M47.818, and M47.28.

Common billing errors arise from site confusion between lumbosacral (M47.897) and sacral/sacrococcygeal (M47.898) regions – using imaging and clinical notes to confirm laterality reduces denials.

Practices using structured documentation workflows can significantly reduce coding errors for musculoskeletal ICD-10-CM codes like M47.898.

ICD-10 Code M47.898: Spondylosis, Other Region (Sacral and Sacrococcygeal) – Code Definition and Billable Status

Sacral spondylosis does not generate the same volume of clinical literature as cervical or lumbar degeneration, yet coding errors at this region are common. When the treating provider documents degenerative changes at the sacrum or coccyx without specifying myelopathy or radiculopathy, the correct ICD-10-CM code is ICD-10 Code M47.898: Spondylosis, Other Region (Sacral and Sacrococcygeal). Getting this right matters: payers require region-specific coding, and a misassigned code in the M47 family can trigger a denial or a request for additional documentation.

M47.898 is a valid, billable diagnosis code under Chapter 13 (Diseases of the musculoskeletal system and connective tissue, M00-M99) of the ICD-10-CM classification system, as maintained by the Centers for Medicare and Medicaid Services (CMS) and the National Center for Health Statistics (NCHS). It falls within the M47 spondylosis category and the M47.89 “Other spondylosis” subcategory. For the 2026 fiscal year, M47.898 remains active and valid for reimbursement claims – though individual payer coverage policies may vary and should be confirmed separately.

This article covers the full clinical context for M47.898, how it differs from closely related codes in the M47 family, and what documentation providers need to support accurate billing. Claims management workflows that account for region-specific coding help practices avoid the most common denial triggers for musculoskeletal diagnoses.

ICD-10 Code M47.898: Spondylosis, Other Region (Sacral and Sacrococcygeal) – Anatomy and Clinical Context

The sacrum is the triangular bone at the base of the lumbar spine, formed by five fused vertebral segments (S1-S5). Below it sits the coccyx, commonly called the tailbone. Together, these structures form the sacral and sacrococcygeal region. Spondylosis at this level involves age-related or degenerative changes to the facet joints, intervertebral discs, and surrounding connective tissue – the same pathophysiological process that occurs at cervical and lumbar levels, but anatomically distinct.

Clinically, sacral spondylosis is less common than lumbar or cervical involvement, but it does present in patients with diffuse spinal degeneration, prior sacral fractures, or long-standing inflammatory arthropathy. Providers most likely to encounter this diagnosis include chiropractors, orthopedic surgeons, physiatrists, and pain management specialists. Physical therapists treating sacral dysfunction may also require this code for documentation purposes tied to physical therapy EMR workflows.

The ICD-10-CM code M47.898 captures spondylosis at this specific anatomical region as a primary diagnosis. It does not imply the presence or absence of neurological complications – that distinction is handled by separate codes within the M47 family, as explained in the section below.

ICD-10 Code M47.898: Spondylosis, Other Region (Sacral and Sacrococcygeal) – Full M47 Code Hierarchy

M47.898 sits within a structured hierarchy. Understanding where it falls helps coders select the correct level of specificity and avoid upcoding or undercoding. According to the ICD List reference for the M47 category, the full spondylosis hierarchy at the sacral and sacrococcygeal region includes three clinically distinct options:

• M47.818 – Spondylosis without myelopathy or radiculopathy, sacral and sacrococcygeal region. Use when the clinical record explicitly confirms the absence of both myelopathy and radiculopathy.
• M47.28 – Other spondylosis with radiculopathy, sacral and sacrococcygeal region. Use when the provider documents nerve root compression or radicular symptoms attributable to the sacral degenerative process.
• M47.898 – Other spondylosis, sacral and sacrococcygeal region. Use when the documentation describes degenerative changes at this region but does not explicitly exclude or confirm myelopathy or radiculopathy.

The broader M47.89 subcategory covers “Other spondylosis” across all spinal regions, from M47.891 (occipito-atlanto-axial) through M47.899 (site unspecified). The sacral and sacrococcygeal variant – M47.898 – is the second-to-last in this regional sequence, preceded by M47.897 for the lumbosacral region. This geographic proximity to the lumbosacral code is a common source of coding confusion, addressed in the differential coding section below.

ICD-10 Code M47.898: M47.89 Subcategory – Full Regional Listing

M47.899 (site unspecified) should only be used when imaging or clinical notes genuinely fail to identify the affected region. Because documentation that confirms the sacral and sacrococcygeal region is available in most cases, M47.899 is not an appropriate substitute for M47.898 when the anatomy is documented.

ICD-10 Code M47.898 vs M47.818 vs M47.28: Differential Coding for the Sacral Region

Three codes cover spondylosis at the sacral and sacrococcygeal region. Choosing the wrong one is the most consequential coding error for this anatomical site. The decision tree is driven entirely by the clinician’s documentation of neurological involvement.

ICD-10 Code M47.898: When to Use Each Sacral Spondylosis Code

Use M47.898 when the clinical note documents sacral or sacrococcygeal spondylosis without explicit reference to myelopathy or radiculopathy. This is appropriate when the provider describes degenerative changes, disc space narrowing, facet hypertrophy, or osteophyte formation at the sacral level – but has not performed or documented neurological testing that rules in or rules out nerve involvement. M47.898 is the default code when the neurological status is unspecified.

Use M47.818 when the provider explicitly documents that the spondylosis is present without myelopathy or radiculopathy. This typically requires a clinical note that states something like “degenerative sacral changes, no evidence of radiculopathy on examination” or “spondylosis without neurological compromise.” The distinction matters because M47.818 signals to payers that a neurological evaluation occurred and was negative – that is a stronger clinical statement than the unspecified nature of M47.898.

Use M47.28 when the documentation confirms radiculopathy attributed to the sacral degenerative process. Radicular symptoms at this level may include pain radiating into the buttock, perineum, or posterior thigh, along with sensory or motor findings consistent with sacral nerve root involvement. Note that myelopathy codes (M47.18x) are generally reserved for the cervical region where cord involvement is anatomically possible – sacral cord pathology is uncommon and may require separate specialist documentation.

ICD-10 Code M47.898: Documentation Requirements for Accurate Billing

Payers require sufficient clinical documentation to support the use of any ICD-10-CM diagnosis code. For M47.898, the documentation must establish two things: the degenerative pathology at the spine, and the specific anatomical region affected. Missing either element creates a vulnerability at the point of payer review.

The CDC/NCHS ICD-10-CM web tool and the ICD-10-CM Official Guidelines for Coding and Reporting (published jointly by CMS and NCHS) provide the governing framework for code selection. Under these guidelines, the diagnosis must be based on the provider’s documented assessment – coders should not infer a diagnosis from symptoms alone. For M47.898, this means the clinical note, radiology report, or assessment section of the encounter must reference sacral or sacrococcygeal spondylosis, degenerative disc disease at the sacral level, or equivalent clinical language.

ICD-10 Code M47.898: Documentation Elements That Support the Code

• Imaging confirmation: X-ray, MRI, or CT findings documenting osteophyte formation, disc space narrowing, facet joint degeneration, or other degenerative changes at S1-S5 or the coccyx.
• Clinical diagnosis statement: Provider documentation using terms such as “sacral spondylosis,” “sacrococcygeal degeneration,” or “degenerative joint disease at the sacral spine.”
• Neurological assessment status: Note whether myelopathy or radiculopathy was assessed. If not assessed, M47.898 is appropriate. If explicitly excluded, M47.818 applies. If confirmed, M47.28 applies.
• Symptom correlation: Documentation of lower back pain, sacral pain, or coccydynia that correlates with the imaging findings helps establish medical necessity.
• Laterality and region specificity: Confirm the sacral region is distinct from the lumbosacral region (L5-S1 junction) to avoid defaulting to M47.897.

For chiropractic practices and sports medicine clinics, where M47 codes appear frequently in high-volume billing workflows, structured note templates that prompt providers to document the region and neurological status reduce the risk of defaulting to unspecified codes. Practices using digital clinical documentation forms can build these prompts directly into their assessment templates.

Reduce M47 coding errors with structured documentation

Pabau's clinical documentation tools help musculoskeletal practices capture region-specific diagnostic details at the point of care – reducing the risk of claim denials tied to unspecified or incorrect ICD-10-CM codes.

Book a demo

ICD-10 Code M47.898: Comorbid Codes and Common Code Pairings

M47.898 is often not the only diagnosis code on a claim. Patients presenting with sacral spondylosis frequently have comorbid musculoskeletal or neurological conditions that require additional ICD-10-CM codes. Understanding which codes pair appropriately with M47.898 helps coders build accurate, complete claims.

For osteopathic practices and pain management specialists, common code pairings with M47.898 include:

• M54.5x (Low back pain): When sacral spondylosis is the underlying cause of documented low back or sacral pain, M54.5x may be coded as an additional diagnosis to capture the symptom burden.
• M53.3 (Sacrococcygeal disorders, not elsewhere classified): For coccydynia or sacrococcygeal joint instability documented alongside degenerative changes.
• M47.897 (Other spondylosis, lumbosacral region): When multi-level degeneration spans both the lumbosacral and sacral regions and both are documented by the provider.
• Z96.641-Z96.649 (Presence of artificial hip joint): Relevant when sacral degeneration is evaluated in the context of adjacent post-surgical anatomy.
• M16.x (Osteoarthritis of hip): Sacral spondylosis can coexist with hip osteoarthritis, particularly in older adults – when both are documented, both codes may apply.

Code pairing decisions should always be based on documented diagnoses, not on the assumption that comorbidities are present. According to the CMS ICD-10 coding guidance, coders must report each condition that coexists at the time of the encounter and affects patient care or management.

ICD-10 Code M47.898: MS-DRG Groupings and Billing Workflow

For inpatient hospital billing, ICD-10-CM diagnosis codes map to Medicare Severity Diagnosis Related Groups (MS-DRGs) under the CMS MS-DRG system. M47.898, like other spondylosis codes in the M47 family, groups into musculoskeletal MS-DRG categories that reflect the relative clinical complexity and resource use of the admission. The specific MS-DRG assignment for any individual claim depends on the principal diagnosis, procedures performed, and the presence of major complication or comorbidity (MCC) or complication or comorbidity (CC) flags.

For outpatient and professional fee billing – which is the most common setting for M47.898 – MS-DRG assignment does not apply. The code is used on CMS-1500 claims (professional billing) or UB-04 claims (facility/outpatient). Providers should confirm payer-specific coverage policies for sacral spondylosis diagnoses, as some commercial payers may require prior authorization for imaging or procedural services when M47.898 appears as the primary diagnosis.

Practices managing high volumes of musculoskeletal claims benefit from integrated billing tools that link diagnosis codes to claims management workflows. When documentation is captured at the point of care and flows directly into the billing module, the risk of code transcription errors and site-level mismatches drops considerably. For physical therapy practices and pain management clinics coding M47 diagnoses regularly, this workflow integration is particularly valuable.

ICD-10 Code M47.898: Spondylosis, Other Region – Specialist Coding Guidance

Specialists in orthopedics, chiropractic care, and pain management will encounter M47.898 most frequently. The code sits within a region that is anatomically adjacent to both the lumbar spine (handled by M47.896) and the lumbosacral junction (M47.897), making precise anatomical identification the central challenge. Several practical points reduce coding friction for specialist practices.

First, confirm that the imaging report explicitly references the sacral or sacrococcygeal region. Radiologists sometimes describe S1 pathology under “lower lumbar spine” or “lumbosacral region” – if the clinical documentation matches that framing, M47.897 may be more appropriate than M47.898. When ambiguity exists, providers should clarify in their assessment note which region is the primary site of the degenerative process.

Second, the M47.898 code is classified by the WHO under the ICD-10 range covering spondylopathies (M45-M49), as confirmed in the WHO ICD-10 browser. This classification context matters for practices that bill internationally or that use ICD-10 codes for quality reporting beyond direct reimbursement purposes. The American ICD-10-CM version used in the United States aligns with WHO ICD-10 at the category level, with additional specificity added at the 6th and 7th character positions where applicable.

Third, for sports medicine providers treating athletes with sacral stress injuries that have progressed to degenerative changes, M47.898 may appear alongside injury-related codes. In these cases, the coding sequence – primary versus secondary diagnosis – should reflect which condition drove the encounter and which represents a background comorbidity. The clinical record should clearly distinguish the two.

Expert Resources for ICD-10 Code M47.898 and Spondylosis Coding

Expert Picks

Need to understand the full M47 spondylosis code family? Chiropractic Practice Software covers how chiropractic clinics manage musculoskeletal documentation and billing workflows across high-volume M47 code sets.

Looking to streamline clinical note capture for ICD-10-CM codes? Pabau Digital Forms explains how configurable digital templates can prompt providers to document region-specific diagnostic details that support accurate code selection.

Managing claims for physical therapy patients with spinal diagnoses? Physical Therapy EMR outlines how integrated documentation and billing tools reduce denial rates for musculoskeletal diagnosis codes including the M47 family.

Want to reduce documentation gaps across your practice? Claims Management Software describes how structured billing workflows support accurate ICD-10-CM code submission and reduce claim rejection rates.

Conclusion

Sacral spondylosis is an underappreciated coding challenge precisely because its anatomy borders both the lumbar and coccygeal regions. When documentation confirms degenerative changes at the sacrum or coccyx without specifying neurological involvement, M47.898 is the correct ICD-10-CM code – but accuracy depends on providers distinguishing this site from the lumbosacral (M47.897) and confirming whether radiculopathy (M47.28) or its absence (M47.818) has been assessed.

Practices that build region-specific prompts into their clinical documentation templates reduce these errors at the point of care rather than catching them at billing. Pabau’s digital documentation tools and claims management workflows help musculoskeletal and pain management practices capture the anatomical detail that supports accurate M47.898 billing. To see how this works in practice, book a demo with the Pabau team.

Frequently Asked Questions