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

Dr. John D. Madigan, DO

Individual provider Nephrology Physician · NPI 1427239854

Dr. John D. Madigan, DO is a Nephrology in Millburn, New Jersey. Qualified in 2003, 23 years ago. Practices with The Nephrology Group PA, a 6-clinician group and accepts Medicare assignment. Licensed in New Jersey.

Years since qualifying
23
Licensed in
NJ
In the registry since
2007
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

See every abbreviation used in this directory →

Practice location Address checks out

225 Millburn Ave Ste 209
Millburn, NJ 07041-1737
Phone: (973) 926-7000
Show map & directions

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

Specialties & licences

Nephrology Physician (primary) Taxonomy 207RN0300X · Licence 25MBO8268200 (NJ)

Record details

NPI number1427239854
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorYes
NPI enumeratedNovember 14, 2007
Last updated in NPPESMarch 1, 2016
Mailing address225 Millburn Ave, Suite 209, Millburn, NJ 07041-1737

Medicare enrollment

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

Medicare specialtyNEPHROLOGY
Also practisesINTERNAL MEDICINE
Medical schoolOTHER
Graduated 2003 (23 years in practice)
Group practice The Nephrology Group Pa — 6 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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