ICD-10 code S58.022D: Partial traumatic amputation, left arm

Key takeaways

S58.022D is a billable ICD-10-CM code for partial traumatic amputation at elbow level, left arm, subsequent encounter.

The code is valid for FY2026, covering encounters from October 1, 2025 through September 30, 2026.

The 7th character D signals subsequent encounter: Active treatment has ended and the patient is in routine follow-up care.

Confusing S58.022A with S58.022D is the most common error in this code family, and the wrong character triggers denial.

Practice management software like Pabau surfaces ICD-10-CM codes inside the clinical note, cutting manual lookup errors at documentation time.

ICD-10 code S58.022D is a billable, specific ICD-10-CM diagnosis code for partial traumatic amputation at elbow level, left arm, subsequent encounter. It is valid on practice management claims for fiscal year 2026, which runs from October 1, 2025 through September 30, 2026.

The code falls under the CDC/NCHS ICD-10-CM system. That system is maintained jointly by the Centers for Medicare and Medicaid Services (CMS) and the National Center for Health Statistics (NCHS).

S58.022 is not billable on its own. The 7th character is what completes the code, and D is the character for the follow-up phase of care.

What “partial” and “at elbow level” mean clinically

Two words in this code’s description carry the clinical weight. Both of them decide which code you select and how the note should be structured.

• Partial vs complete: A partial traumatic amputation means some soft tissue connection remains between the distal and proximal segments. A complete amputation severs all attachment. The distinction changes the code, because complete amputation at elbow level for the left arm uses S58.012D.
• At elbow level: This specifies the anatomical zone of the amputation rather than a specific structure. It covers amputations through or immediately adjacent to the elbow joint. Amputations further down the forearm use the S58.1xx codes instead.
• Left arm specificity: ICD-10-CM S58 codes distinguish laterality. Laterality sits in the sixth character, the third digit after the decimal point. A 2 means left arm and a 1 means right arm, so right arm partial amputation at elbow level uses S58.021D.

The CMS ICD-10-CM code files define “elbow level” within the S58 block as the zone of injury for coding purposes, not a surgical classification. Payers expect the clinical record to support the laterality and injury type before they process the claim.

What does the 7th character D mean?

The 7th character is the most frequent source of coding errors across the S58 family. ICD-10-CM uses three 7th character extensions on traumatic injury codes to show the type of encounter being billed.

According to the ICD-10-CM Official Guidelines for Coding and Reporting, “subsequent encounter” does not mean the patient’s second visit. It refers to any encounter after the active treatment phase has concluded, no matter how many visits the patient has had.

A patient who sees the same provider six times during acute care still has all of those visits coded with the A character. Once the focus shifts to healing, rehabilitation, or routine monitoring, the coder switches to D.

Three characters is a narrow set by S-chapter standards. Fracture categories add characters for delayed healing, nonunion, and malunion, which is why codes like S82.291J and S92.209K exist. Traumatic amputation categories never do.

So when a note describes an amputation site that is slow to heal, D still applies. The healing detail belongs in the procedure code and any additional diagnosis, never in the 7th character.

This distinction directly affects reimbursement. Some procedures and E/M services pair differently with initial and subsequent encounter codes. Submitting S58.022A during a subsequent-care phase can trigger a medical necessity audit. Submitting S58.022D during active surgical management risks underpayment or denial.

Where S58.022D sits in the ICD-10-CM hierarchy

Knowing where S58.022D sits in the code structure helps coders reach the right code faster. It also catches sequencing errors before submission.

• Chapter: S00-T88 (Injury, poisoning and certain other consequences of external causes)
• Block: S50-S59 (Injuries to the elbow and forearm)
• Category: S58 (Traumatic amputation of elbow and forearm)
• Subcategory: S58.0 (Traumatic amputation at elbow level)
• Code: S58.02 (Partial traumatic amputation at elbow level)
• Specific code: S58.022 (Partial traumatic amputation at elbow level, left arm)
• Full code with 7th character: S58.022D (subsequent encounter)

The S58 category covers every traumatic amputation of the elbow and forearm region. Neighboring upper-limb injury codes such as S60.159D take the same A, D and S set, so the framework transfers across the block.

Approximate synonyms for S58.022D

The AAPC ICD-10-CM lookup and the official tabular list recognize several approximate synonyms for S58.022D. These alternate descriptions appear in clinical records and map to this code when the documentation supports the diagnosis.

• Partial amputation at elbow level of left upper limb, subsequent encounter
• Partial traumatic amputation of left arm at elbow level, follow-up care
• Partial traumatic transection at elbow level, left upper extremity, subsequent encounter
• Partial amputation through left elbow joint, subsequent care

These synonyms are not separate codes. All of them map to S58.022D when the record confirms left arm, elbow level, partial amputation, and the subsequent encounter phase. Using a synonym in the record is not an error. The coder simply has to verify all four elements before assigning the code.

Related codes for traumatic amputation at elbow level

S58.022D belongs to a structured family of sibling codes. Coders cross-reference these when laterality, completeness of the amputation, or encounter type differs from the primary code.

Elbow amputation coding guidelines and documentation requirements

Documentation errors are the leading cause of S58.022D claim denials. The code is billable, but payers require the clinical record to support every element before processing.

• What the clinical record must document: All four coding elements have to appear in the note. Those are partial rather than complete amputation, an elbow-level site, the left arm, and the end of active treatment.
• HIPAA submission rules: Under HIPAA, ICD-10-CM codes must be submitted on covered electronic transactions. For HIPAA-compliant documentation, the diagnosis code drives medical necessity for any associated procedure.

A note reading “partial amputation, left upper extremity, follow-up” omits the elbow-level detail. That leaves the coder without grounds to assign S58.022D over a more general code.

Submitting S58.022D without a procedure code for the subsequent care provided creates a bare diagnosis claim. Most payers will hold or reject it.

Common coding errors to avoid:

• Using S58.022A once the patient has moved to routine wound care or rehabilitation
• Omitting the 7th character, since S58.022 on its own is not billable
• Selecting a forearm-level code such as S58.122D when the amputation sits at the elbow joint
• Failing to document laterality, which leaves the coder guessing between the left and right arm codes

The CMS ICD code lists include S58.022D among the valid diagnosis codes accepted for HIPAA Section 111 reporting. Practices using claims management software can cut these errors by building coding prompts into the documentation workflow. The required fields then surface before the note is finalized.

Practices managing ongoing rehabilitation for amputation patients can track the move from acute to subsequent-encounter care in a physical therapy EMR.

CPT codes commonly paired with S58.022D

ICD-10 code S58.022D is a diagnosis code, not a procedure code. Claim submission usually needs at least one CPT code alongside the diagnosis to show what service was provided. The codes below are the ones most often paired with S58.022D during follow-up care.

Treat them as guidance. Payer-specific policies govern medical necessity and coverage for each pairing.

Check payer-specific LCD (Local Coverage Determination) policies before submitting any CPT and ICD-10 pairing. Rehabilitation teams billing 97530 for daily-living retraining usually track those sessions in occupational therapy software.

Practices handling high volumes of traumatic injury follow-up should record the clinical rationale for each CPT code in the visit note. That detail supports medical necessity if the claim is later audited.

ICD-9-CM crosswalk for S58.022D

Legacy systems and historical record retrieval sometimes require mapping S58.022D to its ICD-9-CM equivalent. The General Equivalence Mappings (GEMs) maintained by CMS provide the official forward and backward translation between the two code sets.

These mappings are guidance only. They do not guarantee clinical equivalence, because ICD-10-CM is far more specific than ICD-9-CM.

ICD-9-CM did not distinguish between initial and subsequent encounters within the code itself. That encounter-type granularity is unique to ICD-10-CM, which makes the GEM mapping approximate rather than exact. For an audit on historical claims data, check the CMS GEM files for the best-fit mapping in your scenario.

How Pabau supports ICD-10 coding in clinical workflows

Manual ICD-10 code lookup creates friction twice: Once during the clinical encounter, and again during medical billing review. Coders who leave the chart to confirm a code on a reference site lose time on every lookup, and each switch adds transcription risk.

Practice management software like Pabau embeds ICD-10-CM code search inside clinical documentation workflows, surfacing diagnosis codes as the note is written. Clinicians document the encounter, and the billing team works from that same record without opening a separate lookup tool.

For practices carrying traumatic injury follow-up caseloads, that removes the A-versus-D error behind most S58 denials.

Pabau also supports HIPAA-covered transactions for claim submission. Diagnosis code assignment stays connected to the billing output, so nobody re-enters a code by hand.

Streamline ICD-10 coding in your clinical workflow

Pabau puts diagnosis code search inside the clinical note and the billing screen. Your coders stop switching tabs, so fewer 7th characters get typed from memory.

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Conclusion

The most common error with ICD-10 code S58.022D is a misread 7th character. Submitting A once the patient has moved into routine follow-up creates a denial that was entirely preventable. Dropping the character altogether does the same.

The fix belongs in the note rather than in the billing review. When the record states that active surgical management is complete, the 7th character is settled before anyone opens the claim.

Pabau’s claims management software puts ICD-10-CM code search in the clinical note, so the 7th character is chosen at documentation time. Book a demo to see how Pabau keeps traumatic injury coding accurate from note to claim.

Continue your research

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Documenting a contusion follow-up? S60.159D shows how the D character works on a minor upper-limb injury.

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