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P74.31 ICD-10-CM Code: Hyperkalemia of newborn

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

Coding at a Glance

Tabular directives
1 inclusion term

Billable · FY2027A valid, specific ICD-10-CM code, reportable for dates of service in FY2027.

What you need to know

Source: CMS/NCHS Official ICD-10-CM tabular notes, quoted. From the CMS/NCHS tabular list for the release in force. A note the category or block publishes applies to this code too; the Instructions section marks which is which.

IncludesWhat this code covers
  • transitory endocrine and metabolic disturbances caused by the infant's response to maternal endocrine and metabolic factors, or its adjustment to extrauterine environment

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Inpatient Payment Groups (MS-DRG)

Potential MS-DRG participation — not a DRG assignment.

MS-DRGs this diagnosis helps define, as principal or secondary, per the CMS ICD-10-CM/PCS MS-DRG Definitions Manual v44, Appendix B.

  • MS-DRG 791 — PREMATURITY WITH MAJOR PROBLEMS (MDC 15)
  • MS-DRG 793 — FULL TERM NEONATE WITH MAJOR PROBLEMS (MDC 15)

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.

Coding instructions

Official Tabular Instructional Notes: the inclusion, exclusion and sequencing notes published for P74.31 in the official ICD-10-CM tabular list, quoted as published.

Source: CMS/CDC — ICD-10-CM Tabular ListRelease: FY2027Effective: October 1, 2026

Trace:FY2027 changesChange historyRelease, file and checksum

Notes without a marker are published on P74.31 itself; “inherited from” names the category or block whose note applies here.

Includes

Conditions the official ICD-10-CM tabular list includes under this code.

  • transitory endocrine and metabolic disturbances caused by the infant's response to maternal endocrine and metabolic factors, or its adjustment to extrauterine environment

Source: inherited from P70-P74

Coding context

Guidelines, coding notes, decision aids, relationships (with MS-DRG and CCSR classification), hierarchy, HCC, coverage and the context map: what a coder reaches for after the core. Each section names whether it is official source data, a MedCoder-derived relationship or MedCoder editorial.

Code Overview

Hyperkalemia of newborn is a billable ICD-10-CM diagnosis code (P74.31).

MedCoder summary Summary composed by MedCoder from this code's official ICD-10-CM record. The tabular instructional notes themselves appear verbatim below.

Verify Before Coding

  • No Medicare Code Editor or MS-DRG Definitions Manual restrictions apply to this code.

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

Relationships & Classification

MedCoder-derived relationships — computed from published CMS and AHRQ datasets

Other codes that name P74.31 or its code family, from the CMS ICD-10-CM tabular instructional notes. Tabular-note edges are stored at the code family level that carries each note.

Referenced by 1 Excludes2 note: P00 — Newborn affected by maternal conditions that may be unrelated to present pregnancy (via P74.-).

These codes’ tabular lists name this diagnosis as distinct — both may be reported when both are documented.

MS-DRG Grouper Relationships (FY2027)

Potential MS-DRG participation — not a DRG assignment.

FY2027 MS-DRG: not on the CMS CC/MCC list — as a secondary diagnosis this code does not change MS-DRG severity for that release.

Named in the grouper logic of 2 MS-DRGs: DRG 791 (MDC 15), DRG 793 (MDC 15).

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

Clinical classification (AHRQ CCSR):PNL013 — Other specified and unspecified perinatal conditions (default).

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

Related Codes

Same clinical category (CCSR)

AHRQ's Clinical Classifications Software groups these diagnoses under the same clinical category (Other specified and unspecified perinatal conditions).

P72.1 — Transitory neonatal hyperthyroidism, P72.2 — Other transitory neonatal disorders of thyroid function, not elsewhere classified, P72.8 — Other specified transitory neonatal endocrine disorders, P72.9 — Transitory neonatal endocrine disorder, unspecified, P74.0 — Late metabolic acidosis of newborn, P74.1 — Dehydration of newborn, P74.2 — Disturbances of sodium balance of newborn, P74.21 — Hypernatremia of newborn, P74.22 — Hyponatremia of newborn, P74.3 — Disturbances of potassium balance of newborn, P74.32 — Hypokalemia of newborn, P74.4 — Other transitory electrolyte disturbances of newborn, P74.41 — Alkalosis of newborn, P74.421 — Hyperchloremia of newborn, P74.422 — Hypochloremia of newborn, P74.49 — Other transitory electrolyte disturbance of newborn, P74.5 — Transitory tyrosinemia of newborn, P74.6 — Transitory hyperammonemia of newborn, P74.8 — Other transitory metabolic disturbances of newborn, P74.9 — Transitory metabolic disturbance of newborn, unspecified, +74 more

Same Index main term, other category

The ICD-10-CM Index to Diseases and Injuries files this code under the main terms “Disturbance”, “Imbalance”; these codes share that main term but sit in a different category of the Tabular List.

N85.8 — Other specified noninflammatory disorders of uterus (innervation uterus), O08.5 — Metabolic disorders following an ectopic and molar pregnancy (electrolyte, with, molar pregnancy), O21.1 — Hyperemesis gravidarum with metabolic disturbance (electrolyte, due to hyperemesis gravidarum), O75.89 — Other specified complications of labor and delivery (metabolism, in labor or delivery), P70.8 — Other transitory disorders of carbohydrate metabolism of newborn (metabolism, neonatal, transitory, carbohydrate metabolism, specified type NEC), P70.9 — Transitory disorder of carbohydrate metabolism of newborn, unspecified (metabolism, neonatal, transitory, carbohydrate metabolism), P71.8 — Other transitory neonatal disorders of calcium and magnesium metabolism (metabolism, neonatal, transitory, calcium and magnesium, specified type NEC), P71.9 — Transitory neonatal disorder of calcium and magnesium metabolism, unspecified (metabolism, neonatal, transitory, calcium and magnesium), P72.8 — Other specified transitory neonatal endocrine disorders (endocrine, neonatal, transitory, specified NEC), P72.9 — Transitory neonatal endocrine disorder, unspecified (endocrine, neonatal, transitory), P81.8 — Other specified disturbances of temperature regulation of newborn (temperature, regulation, newborn, specified NEC), P81.9 — Disturbance of temperature regulation of newborn, unspecified (temperature, regulation, newborn), P91.88 — Other specified disturbances of cerebral status of newborn (cerebral, status, newborn, specified NEC), P91.9 — Disturbance of cerebral status of newborn, unspecified (cerebral, status, newborn), R20.0 — Anesthesia of skin (sensation NEC, skin, anesthesia), R20.1 — Hypoesthesia of skin (sensation NEC, skin, hypoesthesia), R20.2 — Paresthesia of skin (sensation NEC, skin, paresthesia), R20.3 — Hyperesthesia (sensation NEC, skin, hyperesthesia), R20.8 — Other disturbances of skin sensation (temperature, sense), R20.9 — Unspecified disturbances of skin sensation (sensation NEC), +129 more

Contextual Map

Every relationship of P74.31 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.

Run P74.31 with this related code in Claim Check

Hierarchy

Referenced by Excludes2 notes

Clinical classification (CCSR)

MS-DRG Grouper

MDC crossing

Index entries

  • Disturbance (s), electrolyte, newborn, transitory, potassium balance, hyperkalemia[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2027
  • Disturbance (s), potassium balance, newborn, hyperkalemia[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2027
  • Imbalance, electrolyte, neonatal, transitory NEC, potassium, hyperkalemia[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2027

Nearest codes (18)

Change history

Reference

Index terms and tables, published questions and FAQ, every source behind this page with its release and checksum, the date-of-service check and the complete change history.

Indexed Clinical Terms (3)

Official source data — entries quoted as published, in the Index’s own lookup phrasing

Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code. These are alphabetic-index entries shown as the Index writes them — lookup phrasing, not necessarily the wording of a final diagnosis.

Sources for this page

Codes, titles, notes, index terms and mappings on this page are transcribed from the datasets below. Relationships MedCoder computed and text MedCoder wrote are labelled where they appear.

Code, title, tabular notes and index terms Official source data
CMS/CDC ICD-10-CM FY2027 tabular list, index and tables, effective October 1, 2026 Release, file and checksum · Publisher’s page
Claim edits Official source data
CMS Definitions of Medicare Code Edits — v44.0 (October 2026) Release, file and checksum · Publisher’s page
Inpatient payment groups Official source data
CMS MS-DRG Definitions Manual (incl. Appendix B diagnosis index, Appendix C CC/MCC list, Appendix E procedure index) and IPPS Final Rule tables — v44 Release, file and checksum · Publisher’s page
Change history and date-of-service validity Official source data
CMS ICD-10-CM release addenda, ingested release by release into the change ledger Release, file and checksum · Publisher’s page
Comparisons, relationships and the contextual map MedCoder-derived relationship
Computed by MedCoder from the tabular notes and tables above; every derived relationship is marked as derived where it appears
Summary and FAQ answers MedCoder editorial explanation
Written by MedCoder to explain the sources above: drafted with AI assistance, checked by a person against the release files, and labelled as MedCoder text where it appears. Not official text.

Current data releases:ICD-10-CM FY2027 · ICD-10-PCS FY2027 · HCPCS October 2026 · MS-DRG v44 · Medicare Code Editor v44.0 · NCCI PTP Q4 2026 · MUE Q4 2026 · NCD code lists 2026-01 · LCD export September 20, 2026 · All releases and sources

Labels on this page: Official source data · MedCoder-derived relationship · MedCoder editorial explanation. How to read the labels · All data sources and release dates · CMS coding rules

Cite this page

Reference this page in a research guide, syllabus or article. The release is included because code content changes each year.

MedCoder.ai. "P74.31 — Hyperkalemia of newborn." ICD-10-CM FY2027. https://medcoder.ai/icd10/code/p74.31-hyperkalemia-of-newborn

Change history

  • FY2019 — October 1, 2018
    Added to the code set
    Hyperkalemia of newborn
    FY2019 changes

Nearest Codes in This Family

Official ICD-10-CM classifications closest to P74.31 in its code family, with their registry titles.

View all codes in the P74 family