Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Ms. Julie M. Grenzer, MSN, CNM
Midwife in Milwaukee, WI · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1528023470
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Registry record
Entity type Individual (Type 1)
Name Ms. Julie M. Grenzer
Credential MSN, CNM
Sex Female
Practice address 8200 W. Silver Spring Drive, Milwaukee, WI, 53216
Phone (414) 769-3900
Fax (414) 372-7289
Enumeration date Apr 20, 2006
Last updated in NPPES Jun 10, 2013
Taxonomy & licenses
CNM · Certified Nurse Midwife: An advanced practice nurse specializing in pregnancy, childbirth, and reproductive care.
About the CNM credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 38339600 | Medicaid | WI | - |
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.
Frequently asked questions
What specialty is Julie Grenzer?
Julie Grenzer is registered in NPPES with the primary taxonomy of Midwife. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-06-10.