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ICD-10/M48.51XG

M48.51XG ICD-10-CM Code: Collapsed vertebra, not elsewhere classified, occipito-atlanto-axial region, subsequent encounter for fracture with delayed healing

Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.

Inpatient Payment Groups (MS-DRG)

MS-DRGs this diagnosis helps define, as principal or secondary, per the CMS ICD-10-CM/PCS MS-DRG Definitions Manual v43.0, Appendix B.

  • MS-DRG 559 — AFTERCARE, MUSCULOSKELETAL SYSTEM AND CONNECTIVE TISSUE WITH MCC (MDC 08)
  • MS-DRG 560 — AFTERCARE, MUSCULOSKELETAL SYSTEM AND CONNECTIVE TISSUE WITH CC (MDC 08)
  • MS-DRG 561 — AFTERCARE, MUSCULOSKELETAL SYSTEM AND CONNECTIVE TISSUE WITHOUT CC/MCC (MDC 08)

A diagnosis appearing in a group's logic does not by itself determine the DRG assigned to a stay; the grouper uses the full claim.

Official Registry Overview & Definition

Collapsed vertebra, not elsewhere classified, occipito-atlanto-axial region, subsequent encounter for fracture with delayed healing is a billable ICD-10-CM diagnosis code (M48.51G).

Official Tabular Instructional Notes

Sequencing, inclusion, and exclusion notes published for M48.51XG in the official ICD-10-CM tabular list.

Excludes1 — Not Coded Here

Conditions generally not reported together with this code (Excludes1) -- an error unless the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).

Change history

No changes recorded for this code — unchanged since the FY2016 baseline of the change ledger.

Verify Before Coding

  • Billable — reportable as written.

From the code registry, the Medicare Code Editor, and the MS-DRG Definitions Manual. Check it against a full claim.

Contextual Map

Every relationship of M48.51XG in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.

Hierarchy

  • M00-M99 — Chapter 13: Diseases of the Musculoskeletal System and Connective Tissue (M00-M99) (M00-M99) [Hierarchy]
  • M45-M49 — Spondylopathies [Hierarchy]

Referenced by Excludes1 notes

  • G55 — Nerve root and plexus compressions in diseases classified elsewhere [Excludes1](via M48.-): “nerve root compression (due to) (in) spondylopathies (M46.-, M48.-)”

Clinical classification (CCSR)

  • MUS017 — Stress fracture, subsequent encounter [CCSR]

Potential MS-DRG

  • DRG 559 — AFTERCARE, MUSCULOSKELETAL SYSTEM AND CONNECTIVE TISSUE WITH MCC [MS-DRG]: “AFTERCARE, MUSCULOSKELETAL SYSTEM AND CONNECTIVE TISSUE WITH MCC (MDC 08)”
  • DRG 560 — AFTERCARE, MUSCULOSKELETAL SYSTEM AND CONNECTIVE TISSUE WITH CC [MS-DRG]: “AFTERCARE, MUSCULOSKELETAL SYSTEM AND CONNECTIVE TISSUE WITH CC (MDC 08)”
  • DRG 561 — AFTERCARE, MUSCULOSKELETAL SYSTEM AND CONNECTIVE TISSUE WITHOUT CC/MCC [MS-DRG]: “AFTERCARE, MUSCULOSKELETAL SYSTEM AND CONNECTIVE TISSUE WITHOUT CC/MCC (MDC 08)”

Nearest codes (40)

  • M48 — Other spondylopathies [Sibling]
  • M48.46XS — Fatigue fracture of vertebra, lumbar region, sequela of fracture [Sibling]
  • M48.47 — Fatigue fracture of vertebra, lumbosacral region [Sibling]
  • M48.47XA — Fatigue fracture of vertebra, lumbosacral region, initial encounter for fracture [Sibling]
  • M48.47XD — Fatigue fracture of vertebra, lumbosacral region, subsequent encounter for fracture with routine healing [Sibling]
  • M48.47XG — Fatigue fracture of vertebra, lumbosacral region, subsequent encounter for fracture with delayed healing [Sibling]
  • M48.47XS — Fatigue fracture of vertebra, lumbosacral region, sequela of fracture [Sibling]
  • M48.48 — Fatigue fracture of vertebra, sacral and sacrococcygeal region [Sibling]
  • and 32 more

Referenced by Other Codes

Clinical classification (AHRQ CCSR):MUS017 — Stress fracture, subsequent encounter (default).

Clinical Classifications Software Refined (CCSR) for ICD-10-CM Diagnoses. Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality.

Potential MS-DRG Relationships (FY2026)

Not on the CMS CC/MCC list — as a secondary diagnosis this code does not change MS-DRG severity.

Named in the grouper logic of 3 MS-DRGs: DRG 559 (MDC 08), DRG 560 (MDC 08), DRG 561 (MDC 08).

From the CMS MS-DRG Definitions Manual (Appendices B and C). Actual DRG assignment depends on the complete claim.

Official ICD-10-CM tabular notes on other codes that name M48.51XG or its code family.

1 Excludes1 notes: G55 (via M48.-).

Frequently Asked Questions (FAQ) & Clinical Guidance

Does M48.51XG require a 7th character?

Yes. The appropriate 7th character is to be added to each code from subcategory M48.5:.

Nearest Codes in This Family

Official ICD-10-CM classifications closest to M48.51XG in its code family, with their registry titles.

  • M48.50XG — Collapsed vertebra, not elsewhere classified, site unspecified, subsequent encounter for fracture with delayed healing
  • M48.50XS — Collapsed vertebra, not elsewhere classified, site unspecified, sequela of fracture
  • M48.51 — Collapsed vertebra, not elsewhere classified, occipito-atlanto-axial region
  • M48.51XA — Collapsed vertebra, not elsewhere classified, occipito-atlanto-axial region, initial encounter for fracture
  • M48.51XD — Collapsed vertebra, not elsewhere classified, occipito-atlanto-axial region, subsequent encounter for fracture with routine healing
  • M48.51XS — Collapsed vertebra, not elsewhere classified, occipito-atlanto-axial region, sequela of fracture
  • M48.52 — Collapsed vertebra, not elsewhere classified, cervical region
  • M48.52XA — Collapsed vertebra, not elsewhere classified, cervical region, initial encounter for fracture
  • M48.52XD — Collapsed vertebra, not elsewhere classified, cervical region, subsequent encounter for fracture with routine healing
  • M48.52XG — Collapsed vertebra, not elsewhere classified, cervical region, subsequent encounter for fracture with delayed healing

View all codes in the M48 family