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

Ran Guan, MD, MS

Individual provider Hospitalist Physician · NPI 1275774192

Ran Guan, MD, MS is an Internal Medicine in Grafton, Wisconsin. Qualified in 1994, 32 years ago. Practices with Aurora Medical Group, Inc, a 3,741-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Wisconsin.

Years since qualifying
32
Licensed in
WI
In the registry since
2009
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.
MS — Master of Science
A graduate science degree.

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Practice location Address checks out

975 Port Washington Rd
Grafton, WI 53024-9201
Phone: (262) 329-1000
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Hospitalist Physician (primary) Taxonomy 208M00000X · Licence 54599020 (WI)

Record details

NPI number1275774192
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD , MS
Sole proprietorNo
NPI enumeratedMarch 23, 2009
Last updated in NPPESJune 12, 2025
Certification dateJune 12, 2025
Mailing addressPo Box 735044, Chicago, IL 60673-5044

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 1994 (32 years in practice)
Group practice Aurora Medical Group, Inc. — 3741 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations6 on file with Medicare

Other providers in Grafton