ICD-9-CM procedure code (retired)
27.91 — Labial frenotomy
ICD-9-CM was replaced by ICD-10 on October 1, 2015. These are the ICD-10-PCS equivalents from the CMS General Equivalence Mappings.
About ICD-9-CM 27.91
27.91 is an ICD-9-CM procedure code for labial frenotomy. 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 0CN00ZZ (Release Upper Lip, Open Approach), 0CN03ZZ (Release Upper Lip, Percutaneous Approach) and 0CN0XZZ (Release Upper Lip, External Approach). All of these are approximate matches, so review the record to pick the right one.
ICD-10-PCS equivalents
- 0CN00ZZRelease Upper Lip, Open Approachapproximate
- 0CN03ZZRelease Upper Lip, Percutaneous Approachapproximate
- 0CN0XZZRelease Upper Lip, External Approachapproximate
- 0CN10ZZRelease Lower Lip, Open Approachapproximate
- 0CN13ZZRelease Lower Lip, Percutaneous Approachapproximate
- 0CN1XZZRelease Lower Lip, External Approachapproximate
Common questions about 27.91
What is the ICD-10 code for ICD-9 27.91?
- The GEMs map 27.91 to ICD-10-PCS 0CN00ZZ, 0CN03ZZ, 0CN0XZZ, 0CN10ZZ, 0CN13ZZ and 0CN1XZZ.
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.