Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.

Mark Jonathan Oldenburg, LPC

Individual provider Professional Counselor · NPI 1275261935

Mark Jonathan Oldenburg, LPC is a Mental Health Counselor in Slinger, Wisconsin. Qualified in 2023, 3 years ago. Licensed in Wisconsin.

Years since qualifying
3
Licensed in
WI
In the registry since
2022
What do these letters mean?
LPC — Licensed Professional Counselor
A licensed mental health counsellor.

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Practice location Address checks out

4509 Arthur Rd
Slinger, WI 53086-9603
Phone: (414) 966-7136
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Professional Counselor (primary) Taxonomy 101YP2500X · Licence 12445 (WI)

Record details

NPI number1275261935
Entity typeIndividual (Type 1)
GenderMale
Credentials LPC
Sole proprietorNo
NPI enumeratedAugust 10, 2022
Last updated in NPPESSeptember 3, 2026
Certification dateSeptember 3, 2026

Medicare enrollment

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

Medicare specialtyMENTAL HEALTH COUNSELOR
Medical schoolOTHER
Graduated 2023 (3 years in practice)
Accepts Medicare assignment Not indicated
Practice locations3 on file with Medicare