John Madigan, D.O.
NPI 1427239854 · Nephrology Physician · Millburn, NJ
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Madigan, D.O. is a Nephrology Physician provider in Millburn, NJ (NPI 1427239854).
Provider details
- NPI number
- 1427239854
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 25MBO8268200 (NJ)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
18 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,289 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 465 | $81 |
| Hemodialysis Procedure With Physician Evaluation90935 | 180 | $71 |
| Dialysis Services, 4 Or More Physician Visits Per Month (20 Years Or Older)90960 | 169 | $358 |
| Home Dialysis Services Per Month (20 Years Or Older)90966 | 131 | $298 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 121 | $135 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 104 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 25 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Dapagliflozin Propanediolbrand: Farxiga | 129 | 28 |
| Amlodipine Besylate | 85 | 34 |
| Sevelamer Carbonate | 79 | 24 |
| Losartan Potassium | 78 | 22 |
| Calcium Acetate | 68 | 24 |
| Carvedilol | 58 | 18 |
| Furosemide | 54 | 22 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$785 across 24 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-11-14
- Last updated
- 2016-03-01
Frequently asked questions
- What is John Madigan's NPI number?
- John Madigan's National Provider Identifier (NPI) is 1427239854, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Madigan's specialty?
- John Madigan is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is John Madigan located?
- John Madigan's practice location on file with NPPES is 225 Millburn Ave, Millburn, NJ 07041-1737.
- What is John Madigan's phone number?
- The practice phone number listed in the NPPES registry for John Madigan is (973) 926-7000.
- Does John Madigan accept Medicare?
- John Madigan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Madigan's NPI active?
- Yes — John Madigan's NPI (1427239854) is active in the NPPES registry as of the last update on 2016-03-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.