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

Freddie J. Mertzig, APNP

Individual provider Nurse Practitioner · NPI 1922523836

Freddie J. Mertzig, APNP is a Nurse Practitioner in Milwaukee, Wisconsin. Qualified in 2017, 9 years ago. Practices with Sheboygan Physicians Group SC, a 15-clinician group and accepts Medicare assignment. Licensed in Wisconsin.

Years since qualifying
9
Licensed in
WI
In the registry since
2017
Specialties on file
2
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Practice location Address checks out

3237 S 16th St
Milwaukee, WI 53215-4526
Phone: (262) 647-5000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Gerontology Nurse Practitioner (primary) Taxonomy 363LG0600X · Licence 7889-33 (WI)
Nurse Practitioner Taxonomy 363L00000X · Licence 7889-33 (WI)

Record details

NPI number1922523836
Entity typeIndividual (Type 1)
GenderMale
Credentials APNP
Sole proprietorNo
NPI enumeratedAugust 11, 2017
Last updated in NPPESSeptember 25, 2017

Medicare enrollment

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

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2017 (9 years in practice)
Group practice Sheboygan Physicians Group S.C. — 15 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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