ICD-10-CM Codes
P00-P96 Certain conditions originating in the perinatal period
P70-P74 Transitory endocrine and metabolic disorders specific to newborn
P74- Other transitory neonatal electrolyte and metabolic disturbances
2021 ICD-10-CM Diagnosis Code P74.21

2021 ICD-10-CM Diagnosis Code P74.21

Hypernatremia of newborn

2019 - New Code

2020

2021

Billable/Specific Code

Code on Newborn Record

P74.21 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
The 2021 edition of ICD-10-CM P74.21 became effective on October 1, 2020.
This is the American ICD-10-CM version of P74.21 - other international versions of ICD-10 P74.21 may differ.

ICD-10-CM Coding Rules

P74.21 should be used on the newborn record - not on the maternal record.

The following code(s) above P74.21 contain annotation back-references

Annotation Back-References

In this context, annotation back-references refer to codes that contain:

Applicable To annotations, or
Code Also annotations, or
Code First annotations, or
Excludes1 annotations, or
Excludes2 annotations, or
Includes annotations, or
Note annotations, or
Use Additional annotations

that may be applicable to P74.21:

P00-P96
2021 ICD-10-CM Range P00-P96
Certain conditions originating in the perinatal period
Includes
- conditions that have their origin in the fetal or perinatal period (before birth through the first 28 days after birth) even if morbidity occurs later
Note
- Codes from this chapter are for use on newborn records only, never on maternal records
Type 2 Excludes
- congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- tetanus neonatorum (A33)
Certain conditions originating in the perinatal period
P70-P74
2021 ICD-10-CM Range P70-P74
Transitory endocrine and metabolic disorders specific to newborn
Includes
- transitory endocrine and metabolic disturbances caused by the infant's response to maternal endocrine and metabolic factors, or its adjustment to extrauterine environment
Transitory endocrine and metabolic disorders specific to newborn

ICD-10-CM P74.21 is grouped within Diagnostic Related Group(s) (MS-DRG v38.0):

791 Prematurity with major problems
793 Full term neonate with major problems

Code History

2019 (effective 10/1/2018): New code
2020 (effective 10/1/2019): No change
2021 (effective 10/1/2020): No change

Diagnosis Index entries containing back-references to P74.21:

Disturbance(s) - see also Disease
- electrolyte - see also Imbalance, electrolyte
  - newborn, transitory P74.49
    ICD-10-CM Diagnosis Code P74.49
    Other transitory electrolyte disturbance of newborn
    2019 - New Code 2020 2021 Billable/Specific Code Code on Newborn Record
    - sodium balance
      - hypernatremia P74.21
- sodium balance, newborn
  - hypernatremia P74.21
Imbalance R26.89
ICD-10-CM Diagnosis Code R26.89
Other abnormalities of gait and mobility
- electrolyte E87.8
  ICD-10-CM Diagnosis Code E87.8
  Other disorders of electrolyte and fluid balance, not elsewhere classified
  2016 2017 2018 2019 2020 2021 Billable/Specific Code
  Applicable To
  Electrolyte imbalance NOS
  Hyperchloremia
  Hypochloremia
  - neonatal, transitory NEC P74.49
    ICD-10-CM Diagnosis Code P74.49
    Other transitory electrolyte disturbance of newborn
    2019 - New Code 2020 2021 Billable/Specific Code Code on Newborn Record
    - sodium
      - hypernatremia P74.21
Newborn (infant) (liveborn) (singleton) Z38.2
ICD-10-CM Diagnosis Code Z38.2
Single liveborn infant, unspecified as to place of birth
Applicable To
Single liveborn infant NOS
- hypernatremia P74.21

ICD-10-CM Codes Adjacent To P74.21

P72 Other transitory neonatal endocrine disorders

P72.0 Neonatal goiter, not elsewhere classified

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 Other transitory neonatal electrolyte and metabolic disturbances

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

P74.31 Hyperkalemia of newborn

P74.32 Hypokalemia of newborn

P74.4 Other transitory electrolyte disturbances of newborn

P74.41 Alkalosis of newborn

P74.42 Disturbances of chlorine balance of newborn

P74.421 Hyperchloremia of newborn

P74.422 Hypochloremia of newborn

P74.49 Other transitory electrolyte disturbance of newborn

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.

2021 ICD-10-CM Diagnosis Code P74.21

Hypernatremia of newborn

Certain conditions originating in the perinatal period

Transitory endocrine and metabolic disorders specific to newborn

Other transitory electrolyte disturbance of newborn

Other abnormalities of gait and mobility

Other disorders of electrolyte and fluid balance, not elsewhere classified

Other transitory electrolyte disturbance of newborn

Single liveborn infant, unspecified as to place of birth