Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Mark Loren Keldahl, MD

Individual provider Vascular Surgery Physician · NPI 1114181658

Mark Loren Keldahl, MD is a Vascular Surgery in Chicago, Illinois. Graduated from Rush Medical College of Rush University in 2004, 22 years ago. Practices with Advocate Health and Hospitals Corporation, a 3,079-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in Illinois and Tennessee.

Years since qualifying
22
Trained at
Rush Medical College of Rush University
Licensed in
IL, TN
In the registry since
2008
Specialties on file
4
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

3000 N Halsted St Ste 703
Chicago, IL 60657
Phone: (773) 296-3390
Fax: (773) 296-7531
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 1325 Eastmoreland Ave Ste 365, Memphis, TN 38104-7542 — (901) 272-6018

Specialties & licences

Vascular Surgery Physician (primary) Taxonomy 2086S0129X · Licence 036-117220 (IL)
Vascular Surgery Physician Taxonomy 2086S0129X · Licence 59517 (TN)
Surgery Physician Taxonomy 208600000X · Licence 036-117220 (IL)
Surgery Physician Taxonomy 208600000X · Licence 036117220 (IL)

Record details

NPI number1114181658
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 14, 2008
Last updated in NPPESJune 25, 2026
Certification dateJune 25, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyVASCULAR SURGERY
Medical schoolRUSH MEDICAL COLLEGE OF RUSH UNIVERSITY
Graduated 2004 (22 years in practice)
Group practice Advocate Health And Hospitals Corporation — 3079 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations6 on file with Medicare

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