DR. STEPHEN EDWARD MERCER (MD PHD) – Dermatopathology (Pathology) Physician, NPI 1740449297
Dermatopathology (Pathology) Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
355 PATHOLOGY in NJ
Provider Addresses for DR. STEPHEN EDWARD MERCER (MD PHD)
1700 Whitehorse Hamilton Square Rd
Hamilton Square, NJ 086903536
Phone: (609) 890-2600
Type: Location
1700 WHITEHORSE HAMILTON SQUARE RD
HAMILTON SQUARE, NJ 086903536
Phone: (609) 890-2600
Type: Location
PO BOX 23329
NEW YORK, NY 100873329
Phone: (410) 873-8500
Type: Mailing
2003 LOWER STATE RD BLDG 200
DOYLESTOWN, PA 189012622
Phone: (215) 345-6647
Fax: (215) 345-0460
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
No Open Payments data available for this provider.
This can happen when there are no reportable CMS Open Payments records.
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: 2019-07-08
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 2 Medicare enrollment records; no due dates published yet.
Enrollment records
2
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 |
|---|---|---|---|---|
| I20110930000211 | I | Pathology | NJ | TBD |
| I20190708002476 | I | Pathology | 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 |
|---|---|---|---|---|
| 88305 | Pathology examination of tissue using a microscope, intermediate complexity | 6,696 | 3,697 | $0 |
| 88342 | Special stained specimen slides to examine tissue, initial procedure | 1,205 | 880 | $0 |
| 88341 | Special stained specimen slides to examine tissue, each additional procedure | 392 | 212 | $0 |
| 88312 | Special stained specimen slides to identify organisms including interpretation and report | 259 | 211 | $0 |
| 88304 | Pathology examination of tissue using a microscope, moderately low complexity | 152 | 142 | $0 |
Insurance plans in this area (ZIP 08690)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| PATHOLOGY | NJ | 88342 | Tissue or cell analysis by immunologic technique | 1200 | 828 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| Physician Assistant | PA | |
| Nurse Practitioner | PA | |
| Physician Assistant | NY | |
| D E R M A T O L O G Y | PA | |
| Physician Assistant | PA | |
| Nurse Practitioner | NY | |
| Nurse Practitioner | NY | |
| D E R M A T O L O G Y | PA | |
| Dermatology, Surgical Oncology | PA | |
| D E R M A T O L O G Y | PA |
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