Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Dr. Ryndon Negrillo Bautista, MD

Individual provider Internal Medicine Physician · NPI 1225230170

Dr. Ryndon Negrillo Bautista, MD practises Internal Medicine in Janesville, Wisconsin. Qualified in 2001, 25 years ago. Practices with Mercy Health System Corporation, a 751-clinician group and accepts Medicare assignment. Licensed in Illinois and Wisconsin.

Years since qualifying
25
Licensed in
IL, WI
In the registry since
2007
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

3524 E Milwaukee St
Janesville, WI 53546-1626 Not confirmed with CMS for 19 years — call before visiting
Phone: (608) 756-7100
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 49833020 (WI)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X (IL)

Record details

NPI number1225230170
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 4, 2007
Last updated in NPPESAugust 27, 2007

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 2001 (25 years in practice)
Group practice Mercy Health System Corporation — 751 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

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 patients417
Services billed 1,434 a service is one billed item, such as a visit, a test or a procedure
Average patient age71

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.

  • University Of Wi Hospitals & Clinics Authority Hospital · Madison, WI · listed as University of Wisconsin Hospitals and Clinics Authority
  • Mercy Health System Corp Hospital · Janesville, WI
  • Mercy Walworth Hospital & Medical Center Hospital · Lake Geneva, WI
  • Commonheart Home Health Home health agency · Waukesha, WI
  • Mercyhealth At Home Home health agency · Janesville, WI

Colleagues at Mercy Health System Corporation

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 751 clinicians in the practice; 12 are shown here.

Other providers in Janesville