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

Nicholas Maddens

Individual provider Internal Medicine Physician · NPI 1841420445

Nicholas Maddens practises Internal Medicine in Royal Oak, Michigan. Graduated from Wayne State University School of Medicine in 2009, 17 years ago. Practices with Oakwood Ambulatory LLC, a 272-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Michigan.

Years since qualifying
17
Trained at
Wayne State University School of Medicine
Licensed in
MI
In the registry since
2009
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Practice location Address checks out

3601 W 13 Mile Rd
Royal Oak, MI 48073-6712
Phone: (248) 898-5000
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

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

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 4301094694 (MI)

Record details

NPI number1841420445
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorNo
NPI enumeratedJuly 17, 2009
Last updated in NPPESOctober 23, 2020
Certification dateOctober 23, 2020

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolWAYNE STATE UNIVERSITY SCHOOL OF MEDICINE
Graduated 2009 (17 years in practice)
Group practice Oakwood Ambulatory Llc — 272 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Removal of skin lesions 1–10 times

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

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 patients194
Services billed 400 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

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.

Colleagues at Oakwood Ambulatory LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 272 clinicians in the practice; 12 are shown here.

Other providers in Royal Oak