ICD-9-CM procedure code (retired)
27.99 — Other operations on oral cavity
About ICD-9-CM 27.99
27.99 is an ICD-9-CM procedure code for other operations on oral cavity. ICD-9-CM was retired for U.S. claims on October 1, 2015, when ICD-10-PCS took over.
The CMS General Equivalence Mappings translate it to 6 ICD-10-PCS codes, such as 0CR407Z (Replacement of Buccal Mucosa with Autologous Tissue Substitute, Open Approach), 0CR40KZ (Replacement of Buccal Mucosa with Nonautologous Tissue Substitute, Open Approach) and 0CR437Z (Replacement of Buccal Mucosa with Autologous Tissue Substitute, Percutaneous Approach). All of these are approximate matches, so review the record to pick the right one.
ICD-10-PCS equivalents
- 0CR407ZReplacement of Buccal Mucosa with Autologous Tissue Substitute, Open Approachapproximate
- 0CR40KZReplacement of Buccal Mucosa with Nonautologous Tissue Substitute, Open Approachapproximate
- 0CR437ZReplacement of Buccal Mucosa with Autologous Tissue Substitute, Percutaneous Approachapproximate
- 0CR43KZReplacement of Buccal Mucosa with Nonautologous Tissue Substitute, Percutaneous Approachapproximate
- 0CR4X7ZReplacement of Buccal Mucosa with Autologous Tissue Substitute, External Approachapproximate
- 0CR4XKZReplacement of Buccal Mucosa with Nonautologous Tissue Substitute, External Approachapproximate
Common questions about 27.99
What is the ICD-10 code for ICD-9 27.99?
- The GEMs map 27.99 to ICD-10-PCS 0CR407Z, 0CR40KZ, 0CR437Z, 0CR43KZ, 0CR4X7Z and 0CR4XKZ.
GEMs are a translation aid, not a substitute for coding from the record. The 2027 ICD-10 code set has changed since the last GEMs release in 2018. Page updated September 29, 2026.