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N44.00 ICD-10-CM Code: Torsion of testis, unspecified

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 729 — OTHER MALE REPRODUCTIVE SYSTEM DIAGNOSES WITH CC/MCC (MDC 12)
  • MS-DRG 730 — OTHER MALE REPRODUCTIVE SYSTEM DIAGNOSES WITHOUT CC/MCC (MDC 12)

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

Torsion of testis, unspecified is a billable ICD-10-CM diagnosis code (N44.00).

Indexed Clinical Terms (1)

Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code.

  • Torsion, testis, testicle

Change history

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

Verify Before Coding

  • CC as a secondary diagnosis (FY2026). Can raise the stay's MS-DRG severity tier.

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

Relationships & Classification

Official ICD-10-CM tabular notes on other codes that name N44.00 or its code family.

1 Excludes2 notes: N50 (via N44.0.-).

Potential MS-DRG Relationships (FY2026)

CC — Complication or Comorbidity. Reported as a secondary diagnosis, this code raises the stay's MS-DRG severity tier — except when the principal diagnosis is one of 5 clinically related codes on its CMS exclusion list.

Named in the grouper logic of 2 MS-DRGs: DRG 729 (MDC 12), DRG 730 (MDC 12).

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

Clinical classification (AHRQ CCSR):GEN016 — Other specified male genital disorders (default).

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

Contextual Map

Every relationship of N44.00 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

  • N00-N99 — Chapter 14: Diseases of the Genitourinary System (N00-N99) (N00-N99) [Hierarchy]
  • N40-N53 — Diseases of male genital organs [Hierarchy]

Referenced by Excludes2 notes

  • N50 — Other and unspecified disorders of male genital organs [Excludes2](via N44.0.-): “torsion of testis (N44.0-)” · check together

Clinical classification (CCSR)

  • GEN016 — Other specified male genital disorders [CCSR]

Potential MS-DRG

  • CC — Complication or Comorbidity [MS-DRG severity]: “As a secondary diagnosis this code can raise the stay's MS-DRG severity tier (CC).”
  • DRG 729 — OTHER MALE REPRODUCTIVE SYSTEM DIAGNOSES WITH CC/MCC [MS-DRG]: “OTHER MALE REPRODUCTIVE SYSTEM DIAGNOSES WITH CC/MCC (MDC 12)”
  • DRG 730 — OTHER MALE REPRODUCTIVE SYSTEM DIAGNOSES WITHOUT CC/MCC [MS-DRG]: “OTHER MALE REPRODUCTIVE SYSTEM DIAGNOSES WITHOUT CC/MCC (MDC 12)”

MDC crossing · procedures (1964)

  • MDC 12 — Diseases and Disorders of the Male Reproductive System [MDC crossing]: “Diseases and Disorders of the Male Reproductive System — the grouper's crossing between diagnoses and procedures: a principal diagnosis sets the MDC, and same-MDC procedures move the stay to its surgical DRGs.”
  • 00HE0MZ — Insertion of Neurostimulator Lead into Cranial Nerve, Open Approach [Same-MDC procedure]: “Insertion of Neurostimulator Lead into Cranial Nerve, Open Approach — grouped in MDC 12, the procedure side of this code's crossing.” · check together
  • 00HE3MZ — Insertion of Neurostimulator Lead into Cranial Nerve, Percutaneous Approach [Same-MDC procedure]: “Insertion of Neurostimulator Lead into Cranial Nerve, Percutaneous Approach — grouped in MDC 12, the procedure side of this code's crossing.” · check together
  • 00HE4MZ — Insertion of Neurostimulator Lead into Cranial Nerve, Percutaneous Endoscopic Approach [Same-MDC procedure]: “Insertion of Neurostimulator Lead into Cranial Nerve, Percutaneous Endoscopic Approach — grouped in MDC 12, the procedure side of this code's crossing.” · check together
  • 00HU0MZ — Insertion of Neurostimulator Lead into Spinal Canal, Open Approach [Same-MDC procedure]: “Insertion of Neurostimulator Lead into Spinal Canal, Open Approach — grouped in MDC 12, the procedure side of this code's crossing.” · check together
  • 00HU3MZ — Insertion of Neurostimulator Lead into Spinal Canal, Percutaneous Approach [Same-MDC procedure]: “Insertion of Neurostimulator Lead into Spinal Canal, Percutaneous Approach — grouped in MDC 12, the procedure side of this code's crossing.” · check together
  • and 1959 more

Index entries

  • Torsion, testis, testicle[Index term]

Nearest codes (9)

  • N44 — Noninflammatory disorders of testis [Sibling]
  • N44.0 — Torsion of testis [Sibling]
  • N44.01 — Extravaginal torsion of spermatic cord [Sibling]
  • N44.02 — Intravaginal torsion of spermatic cord [Sibling]
  • N44.03 — Torsion of appendix testis [Sibling]
  • N44.04 — Torsion of appendix epididymis [Sibling]
  • N44.1 — Cyst of tunica albuginea testis [Sibling]
  • N44.2 — Benign cyst of testis [Sibling]
  • and 1 more

Nearest Codes in This Family

Official ICD-10-CM classifications closest to N44.00 in its code family, with their registry titles.

  • N44 — Noninflammatory disorders of testis
  • N44.0 — Torsion of testis
  • N44.01 — Extravaginal torsion of spermatic cord
  • N44.02 — Intravaginal torsion of spermatic cord
  • N44.03 — Torsion of appendix testis
  • N44.04 — Torsion of appendix epididymis
  • N44.1 — Cyst of tunica albuginea testis
  • N44.2 — Benign cyst of testis
  • N44.8 — Other noninflammatory disorders of the testis

View all codes in the N44 family