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

Donald David Nimmer, MD

Individual provider Family Medicine Physician · NPI 1477555951

Donald David Nimmer, MD is a Family Practice in Greenfield, Wisconsin. Graduated from Medical College of Wisconsin in 1987, 39 years ago. Practices with Ascension Medical Group-Southeast Wisconsin Inc, a 555-clinician group and accepts Medicare assignment. Licensed in Wisconsin.

Years since qualifying
39
Trained at
Medical College of Wisconsin
Licensed in
WI
In the registry since
2005
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

4600 W Loomis Rd Ste 130
Greenfield, WI 53220-4858
Phone: (414) 389-4900
Fax: (414) 465-4606
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence 29494 (WI)

Record details

NPI number1477555951
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 13, 2005
Last updated in NPPESSeptember 19, 2022
Certification dateSeptember 19, 2022
Mailing address4935 S 76th St Ste 101, Greenfield, WI 53220-4305

Medicare enrollment

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

Medicare specialtyFAMILY PRACTICE
Medical schoolMEDICAL COLLEGE OF WISCONSIN
Graduated 1987 (39 years in practice)
Group practice Ascension Medical Group-Southeast Wisconsin Inc — 555 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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