Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Eric A. Johnson, MD

Individual provider Gastroenterology Physician · NPI 1245276534

Eric A. Johnson, MD practises Gastroenterology in Wausau, Wisconsin. Graduated from Medical College of Wisconsin in 2006, 20 years ago. Practices with Gastrointestinal Associates SC, a 43-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Wisconsin.

Years since qualifying
20
Trained at
Medical College of Wisconsin
Licensed in
WI
In the registry since
2006
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

411 Westwood Dr
Wausau, WI 54401-4152 Not confirmed with CMS for 12 years — call before visiting
Phone: (715) 847-2558
Fax: (714) 847-2462
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence 51362 (WI)

Record details

NPI number1245276534
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 22, 2006
Last updated in NPPESAugust 7, 2014

Medicare enrollment

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

Medicare specialtyGASTROENTEROLOGY
Also practisesGERIATRIC MEDICINE, INTERNAL MEDICINE
Medical schoolMEDICAL COLLEGE OF WISCONSIN
Graduated 2006 (20 years in practice)
Group practice Gastrointestinal Associates S.C. — 43 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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.

Upper gastrointestinal (GI) endoscopy for acid reflux 223 times · 92nd percentile
Colonoscopy 122 times · 84th percentile

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 patients386
Services billed 1,583 a service is one billed item, such as a visit, a test or a procedure
Average patient age72

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. Those with a page here are linked.

Colleagues at Gastrointestinal Associates SC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 43 clinicians in the practice; 12 are shown here.

Other providers in Wausau