Donald David Nimmer, MD - Medicare Family Practice in Greenfield, WI

Donald David Nimmer, MD is a medicare enrolled "Family Medicine" physician in Greenfield, Wisconsin. He went to Medical College Of Wisconsin and graduated in 1987 and has 37 years of diverse experience with area of expertise as Family Practice. He is a member of the group practice Wheaton Franciscan Medical Group Inc and his current practice location is 4600 W Loomis Rd, Suite 130, Greenfield, Wisconsin. You can reach out to his office (for appointments etc.) via phone at (414) 389-4900.

Donald David Nimmer is licensed to practice in Wisconsin (license number 29494) and he also participates in the medicare program. He accepts medicare assignments (which means he accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and his NPI Number is 1477555951.

Contact Information

Donald David Nimmer, MD
4600 W Loomis Rd, Suite 130,
Greenfield, WI 53220-4858
(414) 389-4900
(414) 465-4606

Map and Direction




Physician's Profile

Full NameDonald David Nimmer
GenderMale
SpecialityFamily Practice
Experience37 Years
Location4600 W Loomis Rd, Greenfield, Wisconsin
Accepts Medicare AssignmentsYes. He accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Donald David Nimmer attended and graduated from Medical College Of Wisconsin in 1987
  NPI Data:
  • NPI Number: 1477555951
  • Provider Enumeration Date: 08/13/2005
  • Last Update Date: 09/19/2022
  Medicare PECOS Information:
  • PECOS PAC ID: 8123195070
  • Enrollment ID: I20080918000676

Medical Identifiers

Medical identifiers for Donald David Nimmer such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1477555951NPI-NPPES
31588100MedicaidWI

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207Q00000XFamily Medicine 29494 (Wisconsin)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Ascension Se Wisconsin Hospital - St Joseph CampusMilwaukee, WIHospital
Ascension St Francis HospitalMilwaukee, WIHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Wheaton Franciscan Medical Group Inc8628980943565

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. Donald David Nimmer allows following entities to bill medicare on his behalf.
Entity NameAscension Medical Group-southeast Wisconsin Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1609881077
PECOS PAC ID: 8628980943
Enrollment ID: O20031104000421

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Donald David Nimmer is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Donald David Nimmer, MD
4935 S 76th St Ste 101,
Greenfield, WI 53220-4305

Ph: (414) 777-3100
Donald David Nimmer, MD
4600 W Loomis Rd, Suite 130,
Greenfield, WI 53220-4858

Ph: (414) 389-4900

Reviews and Comments


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Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.