Z53.21 – Procedure and treatment not carried out due to patient leaving prior to being seen by health care provider

ICD-10-CM 2027 diagnosis code · Encounters for other specific health care

Billable code

ICD-10-CM code Z53.21

Code: Z53.21 (claims format: Z5321)
Description: Procedure and treatment not carried out due to patient leaving prior to being seen by health care provider
Short description: Proc/trtmt not crd out d/t pt lv bef seen by hlth care prov
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 21. Factors influencing health status and contact with health services (Z00-Z99)
Block: Z40-Z53 Encounters for other specific health care
Parent codes: Z53 › Z53.2

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

Block Z40-Z53

Applicable to:

Categories Z40-Z53 are intended for use to indicate a reason for care. They may be used for patients who have already been treated for a disease or injury, but who are receiving aftercare or prophylactic care, or care to consolidate the treatment, or to deal with a residual state

Excludes2 (not included here):

follow-up examination for medical surveillance after treatment (Z08-Z09)

Index terms for Z53.21

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in Z53.2

Frequently asked questions

What is ICD-10 code Z53.21?

Z53.21 is the ICD-10-CM code for procedure and treatment not carried out due to patient leaving prior to being seen by health care provider, in the block Z40-Z53 (Encounters for other specific health care).

Is Z53.21 a billable code?

Yes. Z53.21 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does Z53.21 belong to?

It belongs to category Z53 – Persons encountering health services for specific procedures and treatment, not carried out.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.