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

Michael Ryan Oldenburg, NP

Individual provider Registered Nurse · NPI 1659910800

Michael Ryan Oldenburg, NP is a Nurse Practitioner in Marietta, Georgia. Qualified in 2021, 5 years ago. Practices with Wellstar Medical Group LLC, a 3,072-clinician group and accepts Medicare assignment. Licensed in Georgia.

Years since qualifying
5
Licensed in
GA
In the registry since
2020
Specialties on file
2
What do these letters mean?
NP — Nurse Practitioner
An advanced practice nurse who can diagnose, treat and in most states prescribe.

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Practice location Address checks out

400 Tower Rd NE Ste 200
Marietta, GA 30060-9412
Phone: (770) 422-1372
Show map & directions

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

Specialties & licences

Critical Care Medicine Nurse Practitioner (primary) Taxonomy 363LC0200X · Licence RN259503 (GA)
Registered Nurse Taxonomy 163W00000X · Licence RN259503 (GA)

Record details

NPI number1659910800
Entity typeIndividual (Type 1)
GenderMale
Credentials NP
Sole proprietorYes
NPI enumeratedJanuary 4, 2020
Last updated in NPPESOctober 5, 2021
Certification dateOctober 5, 2021

Medicare enrollment

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

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2021 (5 years in practice)
Group practice Wellstar Medical Group Llc — 3072 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations5 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients64
Services billed 112 a service is one billed item, such as a visit, a test or a procedure
Average patient age73

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

  • Wellstar Cobb Medical Center Hospital · Austell, GA · listed as Wellstar Cobb Medical Group, LLC
  • Wellstar Kennestone Regional Medical Center Hospital · Marietta, GA

Colleagues at Wellstar Medical Group LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 3072 clinicians in the practice; 12 are shown here.

Other providers in Marietta