2027 ICD-10-CM Diagnosis Code Z98.818Other dental procedure status
Z98.818 is a billable ICD-10-CM diagnosis code for other dental procedure status. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 951. The code is not accepted as a principal diagnosis by the Medicare Code Editor and exempt from POA reporting. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Implant, device or graft related encounter.
Code Identity
Code Classification
Code EditsBilling
Medicare Code Editor checks that affect claim validity for Z98.818.
Present on Admission (POA)Billing
Z98.818 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review the other POA exempt codes in Persons with potential health hazards related to family and personal history and certain conditions influencing health status (Z77-Z99).
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Dental structure displaced into maxillary sinus
- Displacement of root of tooth into maxillary sinus due to and following extraction of tooth
- Full restoration of crown of tooth needed due to previous endodontic treatment
- History of revision of root canal treatment of anterior tooth
- History of revision of root canal treatment of canine tooth
- History of revision of root canal treatment of incisor tooth
- History of revision of root canal treatment of molar tooth
- History of revision of root canal treatment of premolar tooth
- History of root canal treatment
- History of surgical procedure on mouth
- History of tooth extraction
- History of vital pulpotomy
- Orthodontic treatment stopped
- Procedure needed
- Tooth cavity drilled and filled
- Tooth restored - fixed bridge
- Tooth restored with crown
- Tooth restored with gold inlay
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to Z98.818: its own notes plus those printed at Z98, block Z77-Z99, and Chapter 21. A note printed at a category, block or chapter applies to every code under it.
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
Code Also
A second code may be needed to fully describe the condition; the note gives no sequencing direction.
Notes
General instructions on how these codes are used.
- Z codes represent reasons for encounters. A corresponding procedure code must accompany a Z code if a procedure is performed. Categories Z00-Z99 are provided for occasions when circumstances other than a disease, injury or external cause classifiable to categories A00-Y89 are recorded as 'diagnoses' or 'problems'. This can arise in two main ways:
- (a) When a person who may or may not be sick encounters the health services for some specific purpose, such as to receive limited care or service for a current condition, to donate an organ or tissue, to receive prophylactic vaccination (immunization), or to discuss a problem which is in itself not a disease or injury.
- (b) When some circumstance or problem is present which influences the person's health status but is not in itself a current illness or injury.
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name Z98.818, its category, or a range that includes it.
Excludes2 2
These codes carry an Excludes2 note naming Z98.818: its condition is not part of those codes, and both may be reported when the patient has both.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Status (post) See Also: Presence (of);
dental Z98.818
specified NEC Z98.818
postoperative (postprocedural) NEC Z98.890
dental Z98.818
specified NEC Z98.818
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Convert Z98.818 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About Z98.818Overview
What is the ICD-10 code for other dental procedure status?
The ICD-10-CM code for other dental procedure status is Z98.818 (sometimes written as Z98818). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is Z98.818 (Dental procedure status) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report other dental procedure status on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does Z98.818 group to?
On inpatient claims, other dental procedure status maps to MS-DRG 951 (other Factors Influencing Health Status), which carries a relative weight of 0.5574. Higher weights mean higher Medicare reimbursement.
Can Z98.818 be a principal diagnosis?
No. The Medicare Code Editor rejects this code as a principal diagnosis because other dental procedure status describes a circumstance that influences health status rather than a current illness. Report it as a secondary diagnosis.
Is Z98.818 exempt from POA reporting?
Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for other dental procedure status on inpatient claims. The code appears in the Persons with potential health hazards related to family and personal history and certain conditions influencing health status (Z77-Z99) range of the CMS exempt list.
