Karen DiefenbachM.D.
Colorectal Surgery·Columbus, OH
Karen Diefenbach, M.D. is a Colorectal Surgery provider in Columbus, OH, as of July 2026.
- NPI1164658258
- Registered2009
Case volumes, referral patterns, and payer mix live in DataLily AI Insights.
Karen Diefenbach at a glance
- Provider
- Karen Diefenbach
- Credential
- M.D.
- Specialty
- Colon & Rectal Surgery
- Location
- Columbus, OH
- NPI registered
- 2009
- NPI
- 1164658258
- Snapshot
- July 2026
Identity, specialty, and affiliations change over time. This is not an endorsement, and not clinical, billing, or legal advice. Providers may request corrections at founders@datalilyai.com. Read the DataLily AI data methodology.
Questions
Where does Karen Diefenbach practice?
Karen Diefenbach, M.D. is based in Columbus, OH. Affiliations reflect the current DataLily AI snapshot (July 2026) and can change.
What is Karen Diefenbach's NPI number?
Karen Diefenbach's National Provider Identifier (NPI) is 1164658258, registered in 2009. Specialty on record: Colon & Rectal Surgery; credential M.D.
How many Colorectal Surgery providers in Ohio work at ambulatory surgery centers?
12 Colorectal Surgery surgeons and proceduralists in Ohio are affiliated with ambulatory surgery centers in DataLily AI's current snapshot, Karen Diefenbach among them. The Ohio Colorectal Surgery directory lists each one by city with credential, NPI, and center affiliations.
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