AHA Coding Clinic® for ICD-9 - 1984 July - August
Class 4 Procedures
The following list of Class 4 Procedures are now allowed for use in DRG assignment in billing for operating room procedures (issued in April 1984). Note: Classes of procedures were eliminated with the revision of UHDDS implemented January 1, 1986. See Coding Clinic, July-August, 1985. 01.18Other brain dx procedure01.19Other skull dx procedure03.39Other spinal dx procedure04.19Peripheral nerve dx procedure NEC05.19Sympathetic nerve dx procedure NEC06.19Thyroid/parathyroid dx procedure NEC07.19Endocrine dx procedure NEC08.91Electrosurgical lid epilation08.92Cryosurgical lid epilation08.93Eyelid epilation NEC09.19Lacrimal system dx procedure NEC09.41Lacrimal punctum probe09.42Lacrimal canaliculi probe09.43Nasolacrimal duct probe09...
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Article Overview
This article is a historical coding reference for Class 4 Procedures and explains that these procedure classes were allowed for DRG assignment in operating room billing at the time of issuance. It is relevant for coders, auditors, and researchers who work with legacy inpatient classification rules and need to understand the scope of procedure categories covered before the class system was eliminated. The article primarily presents a long list of procedure categories across multiple body systems, along with a note about the later removal of procedure classes from UHDDS guidance.
Why This Topic Matters
It helps users identify whether a legacy procedure category fell within the historical DRG assignment framework and understand the time period to which the reference applies. That can be important when reviewing archived records, comparing older coding guidance, or researching changes in inpatient classification policy.
What You Will Learn
- The historical context for Class 4 Procedures in DRG assignment
- That the reference applies to an older inpatient coding framework
- The broad anatomic and specialty groupings included in the list
- The significance of the later UHDDS revision note
Who Should Read This
- Medical coders
- Coding auditors
- HIM professionals
- Revenue cycle staff
- Compliance teams
- Healthcare researchers
Codes Discussed
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