CPT 43644
Laparoscopic gastric bypass with Roux-en-Y gastroenterostomy
Last reviewed August 2026 · DataLily AI data team
What does CPT 43644 mean?
CPT 43644 reports a laparoscopic gastric bypass with a Roux-en-Y gastroenterostomy, in which a small gastric pouch is connected to a rerouted limb of small intestine. It is grouped with the other laparoscopic bariatric surgery codes in the 43644–43645 and 43770 families.
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CPT 43644 at a glance
- Code
- 43644
- Code type
- CPT/HCPCS
- Short descriptor
- Lap gastric bypass/roux-en-y
- Category
- Not typically performed in an ASC
- ASC eligibility
- Not typically performed in an ASC
- Typical setting
- Hospital outpatient department (POS 22) or office (POS 11). Not typically performed in an ASC.
What is CPT code 43644?
CPT 43644 reports a laparoscopic gastric bypass with a Roux-en-Y gastroenterostomy, in which a small gastric pouch is connected to a rerouted limb of small intestine. It is grouped with the other laparoscopic bariatric surgery codes in the 43644–43645 and 43770 families. Its official short descriptor is "Lap gastric bypass/roux-en-y", and in the ASC context it is grouped under Not typically performed in an ASC.
Is CPT 43644 eligible in an ambulatory surgery center (ASC)?
CPT 43644 is not typically performed in an ambulatory surgery center; it is usually done in a hospital outpatient department (HOPD) or office instead.
Where is CPT 43644 typically performed?
Hospital outpatient department (POS 22) or office (POS 11). Not typically performed in an ASC.
Which specialties use CPT 43644?
CPT 43644 is most associated with Gastroenterology, General Surgery.
Reference information about ASC eligibility and typical procedure setting. Codes, descriptors, and ASC-eligibility status change over time. This is a coding reference, not billing, coding, or legal advice. Always verify against current guidance and individual payer policy before scheduling or billing. CPT is a registered trademark of the American Medical Association. Read the DataLily AI data methodology.