Ryan D Holzmacher, MD - Medicare Internal Medicine in Greenfield, WI

Ryan D Holzmacher, MD is a medicare enrolled "Internal Medicine" physician in Greenfield, Wisconsin. He went to Southern Illinois University School Of Medicine and graduated in 1999 and has 26 years of diverse experience with area of expertise as Internal Medicine. He is a member of the group practice Oak Medical Sc and his current practice location is 5017 S 110th St, Greenfield, Wisconsin. You can reach out to his office (for appointments etc.) via phone at (414) 301-3531.

Ryan D Holzmacher is licensed to practice in Wisconsin (license number 42642-020) 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 1598700601.

Contact Information

Ryan D Holzmacher, MD
5017 S 110th St,
Greenfield, WI 53228-3131
(414) 301-3531
Not Available

Map and Direction




Physician's Profile

Full NameRyan D Holzmacher
GenderMale
SpecialityInternal Medicine
Experience26 Years
Location5017 S 110th St, 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:
  • Ryan D Holzmacher attended and graduated from Southern Illinois University School Of Medicine in 1999
  NPI Data:
  • NPI Number: 1598700601
  • Provider Enumeration Date: 06/20/2006
  • Last Update Date: 09/20/2024
  Medicare PECOS Information:
  • PECOS PAC ID: 7214909761
  • Enrollment ID: I20060905000204

Medical Identifiers

Medical identifiers for Ryan D Holzmacher such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1598700601NPI-NPPES
34749000MedicaidWI

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RN0300XInternal Medicine - Nephrology 42642-020 (Wisconsin)Secondary
208VP0000XPain Medicine - Pain Medicine 42642-020 (Wisconsin)Secondary
207R00000XInternal Medicine 42642-020 (Wisconsin)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Waukesha Memorial HospitalWaukesha, WIHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Oak Medical Sc004259517587

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. Ryan D Holzmacher allows following entities to bill medicare on his behalf.
Entity NameOak Medical Sc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1669910345
PECOS PAC ID: 0042595175
Enrollment ID: O20170331001848
Entity NameMaple Medical Sc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1487152104
PECOS PAC ID: 9032471248
Enrollment ID: O20180328002607

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. Ryan D Holzmacher 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
Ryan D Holzmacher, MD
19050 Blue Ridge Ct,
Brookfield, WI 53045-5103

Ph: (414) 202-1724
Ryan D Holzmacher, MD
5017 S 110th St,
Greenfield, WI 53228-3131

Ph: (414) 301-3531

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.