DR. WILLIAM L DIEHL (M.D.) – Surgical Oncology Physician, NPI 1629068457
Surgical Oncology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
984 GENERAL SURGERY in NJ
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Provider Addresses for DR. WILLIAM L DIEHL (M.D.)
James Street, Dublin, Morristown, Morris County, New Jersey, 07960, United States
SUITE 2G
MORRISTOWN, NJ 079606392
Phone: (973) 267-6400
Fax: (973) 267-7295
Type: Mailing
Summit Medical Group, 75, East Northfield Road, Northfield, Livingston, Essex County, New Jersey, 07039, United States
LIVINGSTON, NJ 070394532
Phone: (973) 436-1530
Fax: (973) 422-0414
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 1 Open Payments records for all available years, with a total value of $19.
Total Amount is formed as General ($19) + Research ($0) + Ownership ($0) = $19.
Last reported payment date: 2024-12-11 • Largest payer in this snapshot: LEICA MICROSYSTEMS INC. ($19).
Total Amount
$19
General + Research + Ownership
Payments
1
Total payment records
General Amount
$19
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-11
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| LEICA MICROSYSTEMS INC. | $19 |
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: 2005-06-21
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 |
|---|---|---|---|---|
| I20050621000068 | I | General Surgery | 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 |
|---|---|---|---|---|
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 169 | 161 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 62 | 59 | $0 |
| 99204 | New patient office or other outpatient visit, 45-59 minutes | 60 | 60 | $0 |
| 19083 | Biopsy of breast and placement of locating device using ultrasound, first growth | 49 | 48 | $0 |
| 99205 | New patient office or other outpatient visit, 60-74 minutes | 42 | 42 | $0 |
Insurance plans in this area (ZIP 07960)
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Provider's Procedures
Group practice members
| Name | Specialty | State |
|---|---|---|
| U R O L O G Y | NJ | |
| Radiation Oncology | NY | |
| - | NJ | |
| - | NJ | |
| Physical Therapist In Private Practice | NJ | |
| - | NJ | |
| - | NJ | |
| G A S T R O E N T E R O L O G Y | NJ | |
| - | NJ | |
| - | NJ |
Reviews
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