DR. JOHN H MARKS (MD) – Colon & Rectal Surgery Physician, NPI 1346212594
Colon & Rectal Surgery Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
167 COLORECTAL SURGERY (PROCTOLOGY) in PA
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Provider Addresses for DR. JOHN H MARKS (MD)
Lankenau Medical Center, 100, East Lancaster Avenue, Wynnewood, Lower Merion Township, Montgomery County, Pennsylvania, 19096, United States
SUITE 330 LANKENAU MOB WEST
WYNNEWOOD, PA 190963450
Phone: (610) 645-9093
Fax: (610) 645-9476
Mailing address matches the actual address.
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 57 Open Payments records for all available years, with a total value of $49,636.
Total Amount is formed as General ($49,636) + Research ($0) + Ownership ($0) = $49,636.
Last reported payment date: 2024-12-24 • Largest payer in this snapshot: Vascular Technology, Inc. ($23,000).
Total Amount
$49,636
General + Research + Ownership
Payments
57
Total payment records
General Amount
$49,636
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-24
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Vascular Technology, Inc. | $23,000 |
| Arthrex, Inc. | $11,252 |
| Stryker Corporation | $10,526 |
| Medtronic, Inc. | $2,905 |
| Virtual Incision Corporation | $526 |
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: 2010-09-20
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 |
|---|---|---|---|---|
| I20100920001097 | I | Colorectal Surgery (Proctology) | PA | 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 |
|---|---|---|---|---|
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 157 | 129 | $0 |
| 45330 | Diagnostic exam of lower portion of large bowel using a flexible endoscope | 151 | 129 | $0 |
| 99215 | Established patient office or other outpatient visit, 40-54 minutes | 86 | 62 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 85 | 64 | $0 |
| 45380 | Biopsy of large bowel using a flexible endoscope | 68 | 67 | $0 |
Insurance plans in this area (ZIP 19096)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| COLORECTAL SURGERY (PROCTOLOGY) | PA | 46600 | Diagnostic examination of the anus using an endoscope | 27 | 26 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| - | PA | |
| Family Practice | PA | |
| - | PA | |
| General Surgery | PA | |
| - | PA | |
| - | PA | |
| Internal Medicine | PA | |
| Internal Medicine | PA | |
| - | PA | |
| Family Practice, Geriatric Medicine | PA |
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