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

Dr. Karen S Shimshak, MD

Individual provider Ophthalmology Physician · NPI 1407931769

Dr. Karen S Shimshak, MD practises Ophthalmology in Jacksonville, Florida. Graduated from Medical College of Wisconsin in 1985, 41 years ago. Practices with Mayo Clinic Jacksonville, a 1,581-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Florida and Montana.

Years since qualifying
41
Trained at
Medical College of Wisconsin
Licensed in
FL, MT
In the registry since
2006
Specialties on file
2
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

807 Childrens Way
Jacksonville, FL 32207-8426
Phone: (904) 697-3600
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 4500 San Pablo Rd S, Jacksonville, FL 32224-1865 — (904) 953-2000

Specialties & licences

Ophthalmology Physician (primary) Taxonomy 207W00000X · Licence ME122759 (FL)
Ophthalmology Physician Taxonomy 207W00000X · Licence 42851 (MT)

Record details

NPI number1407931769
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 26, 2006
Last updated in NPPESSeptember 2, 2020
Certification dateSeptember 2, 2020

Medicare enrollment

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

Medicare specialtyOPHTHALMOLOGY
Medical schoolMEDICAL COLLEGE OF WISCONSIN
Graduated 1985 (41 years in practice)
Group practice Mayo Clinic Jacksonville — 1581 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Removal of skin lesions 1–10 times
Removal or shaving of skin growth 1–10 times
Skin biopsy 1–10 times

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients257
Services billed 548 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Mayo Clinic Jacksonville

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1581 clinicians in the practice; 12 are shown here.

Other providers in Jacksonville