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ICD-10-CM 2027 diagnosis code

F53.1Puerperal psychosis

✓ Billable / specificMaternity · age 9–64Female only

F53.1 is a valid, billable ICD-10-CM code for puerperal psychosis. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Code last changed in FY2019 (effective October 1, 2018). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About F53.1

F53.1 is the ICD-10-CM diagnosis code for puerperal psychosis. It belongs to category F53 (mental and behavioral disorders associated with the puerperium, not elsewhere classified), block F50-F59 (behavioral syndromes associated with physiological disturbances and physical factors) and chapter 5 (mental, Behavioral and Neurodevelopmental disorders). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within F53 (mental and behavioral disorders associated with the puerperium, not elsewhere classified), F53.1 is specifically for puerperal psychosis. Related codes cover postpartum depression (F53.0).

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 885 (Psychoses, relative weight 1.3901), in MDC 19 (Mental Diseases and Disorders), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

The Medicare Code Editor treats this as a maternity diagnosis, expected only for patients age 9 through 64.

It is on the CMS list of diagnoses consistent only with female patients (the sex-conflict edit itself was retired in FY2025).

It was added in FY2019, effective October 1, 2018.

Coding notes

Applicable toConditions and synonyms classified to this code
  • Postpartum psychosis
  • Puerperal psychosis, NOS

Notes that apply from higher levels

Instructions written at a parent level also apply to F53.1.

› From F53 Mental and behavioral disorders associated with the puerperium, not elsewhere classified
Excludes1

Broader instructions also apply from Chapter 5: Mental, Behavioral and Neurodevelopmental disorders.

Alphabetic index entries

4 entries

Terms in the official ICD-10-CM index that lead to F53.1.

Codes whose notes reference F53.1

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

MDC 19 · Mental Diseases and Disorders

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2019 (effective 10/1/2018): Added
  • No changes since FY2019.

Common questions about F53.1

Is F53.1 billable?

Yes. F53.1 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can F53.1 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict F53.1 as a principal diagnosis.

Is F53.1 a CC or MCC?

No. F53.1 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does F53.1 group to?

F53.1 is used in the MS-DRG v44.0 logic for MS-DRG 885 (Psychoses). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.