DR. DONALD JAMES MCMAHON (D.O.) – Gastroenterology Physician, NPI 1285824839
Gastroenterology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
757 GASTROENTEROLOGY in NJ
Provider Addresses for DR. DONALD JAMES MCMAHON (D.O.)
570 EGG HARBOR RD
SUITE C-2
SEWELL, NJ 080802359
Phone: (856) 783-2241
Fax: (856) 783-2243
Type: Mailing
188 FRIES MILL RD
SUITE N-1
TURNERSVILLE, NJ 080122015
Phone: (856) 783-2241
Fax: (856) 783-2243
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
Loading prescription activity...
Open Payments (CMS)
CMS reports 1 Open Payments records for all available years, with a total value of $16.
Total Amount is formed as General ($16) + Research ($0) + Ownership ($0) = $16.
Last reported payment date: 2023-10-05 • Largest payer in this snapshot: NESTLE HEALTHCARE NUTRITION INC. ($16).
Total Amount
$16
General + Research + Ownership
Payments
1
Total payment records
General Amount
$16
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2023-10-05
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| NESTLE HEALTHCARE NUTRITION INC. | $16 |
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2010-09-07
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20100907000611 | I | Gastroenterology | NJ | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99203 | New patient office or other outpatient visit, 30-44 minutes | 101 | 101 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 37 | 34 | $0 |
| 43239 | Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 35 | 35 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 32 | 30 | $0 |
| 45378 | Diagnostic exam of large bowel using a flexible endoscope | 28 | 28 | $0 |
Insurance plans in this area (ZIP 08080)
Loading plans...
Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| GASTROENTEROLOGY | NJ | 45378 | Diagnostic examination of large bowel using an endoscope | 20 | 20 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| Internal Medicine | NJ | |
| Family Practice | NJ | |
| Nurse Practitioner | NJ | |
| Internal Medicine | NJ | |
| Family Practice | NJ | |
| Family Practice | NJ | |
| Nurse Practitioner | NJ | |
| Nurse Practitioner | NJ | |
| Nurse Practitioner | NJ | |
| Internal Medicine | NJ |
Reviews
All reviews are moderated before publication. Reviews reflect users' opinions; we do not verify the accuracy of individual reviews.
No reviews yet. Be the first to share your experience — your opinion helps families compare providers.