Karen Diefenbach, M.D.
NPI 1164658258 · Pediatric Surgery Physician · Columbus, OH
Enrolled with Medicare as Practitioner - General Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karen Diefenbach, M.D. is a Pediatric Surgery Physician provider in Columbus, OH (NPI 1164658258).
Provider details
- NPI number
- 1164658258
- Entity type
- Individual
- Primary specialty
- Pediatric Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 35.099337 (OH)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
17 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
8 documented practice locations
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Additional practice locations (7)
- 26 Hospital DrAthens, OH 45701-2471Phone: (614) 722-2000
- 700 Childrens DrColumbus, OH 43205-2664Phone: (614) 722-6200
- 5665 Venture DrDublin, OH 43017-2159Phone: (614) 722-6200
- 536 S Trimble RdMansfield, OH 44906-3418Phone: (614) 722-6200
- 2222 Cherry St Ste 1800Toledo, OH 43608-2679Phone: (614) 722-4300Fax: (614) 722-7766
- 2213 Cherry StToledo, OH 43608-2603Phone: (419) 251-4300Fax: (419) 251-7766
- 455 Executive Campus DrWesterville, OH 43082-8870Phone: (614) 722-6200
Registry dates
- Enumerated
- 2009-06-03
- Last updated
- 2024-11-19
- Certified
- 2024-11-19
Frequently asked questions
- What is Karen Diefenbach's NPI number?
- Karen Diefenbach's National Provider Identifier (NPI) is 1164658258, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Diefenbach's specialty?
- Karen Diefenbach is listed in the NPPES registry with a primary specialty of Pediatric Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Karen Diefenbach located?
- Karen Diefenbach's practice location on file with NPPES is 555 S 18th St, Columbus, OH 43205-2654.
- What is Karen Diefenbach's phone number?
- The practice phone number listed in the NPPES registry for Karen Diefenbach is (614) 722-6200.
- Does Karen Diefenbach accept Medicare?
- Karen Diefenbach is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karen Diefenbach's NPI active?
- Yes — Karen Diefenbach's NPI (1164658258) is active in the NPPES registry as of the last update on 2024-11-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.