DR. JOHN WESLEY JR. MERCER (M.D.) – Family Medicine Physician, NPI 1235196957
Family Medicine Physician
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Doctor Profile
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Profile Insights
NPPES metrics only — not quality of care.
8,705 FAMILY PRACTICE in TX
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Provider Addresses for DR. JOHN WESLEY JR. MERCER (M.D.)
Cooper Drive, Wylie, Collin County, Texas, 75098, United States
WYLIE, TX 750983970
Phone: (972) 442-7325
Fax: (972) 442-8348
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 8 Open Payments records for all available years, with a total value of $854.
Total Amount is formed as General ($854) + Research ($0) + Ownership ($0) = $854.
Last reported payment date: 2024-07-25 • Largest payer in this snapshot: Intuitive Surgical, Inc. ($827).
Total Amount
$854
General + Research + Ownership
Payments
8
Total payment records
General Amount
$854
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-07-25
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Intuitive Surgical, Inc. | $827 |
| GlaxoSmithKline, LLC. | $13 |
| SANOFI PASTEUR INC. | $13 |
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: 2004-05-25
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 |
|---|---|---|---|---|
| I20040525001583 | I | Family Practice | TX | 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 | 188 | 100 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 176 | 90 | $0 |
| 36415 | Insertion of needle into vein for collection of blood sample | 161 | 125 | $0 |
| G0439 | Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 108 | 108 | $0 |
| G0008 | Administration of influenza virus vaccine | 59 | 58 | $0 |
Insurance plans in this area (ZIP 75098)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| FAMILY MEDICINE | TX | 83036 | Hemoglobin A1C level | 57 | 39 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| Radiation Oncology | TX | |
| Nurse Practitioner | TX | |
| Internal Medicine | TX | |
| - | TX | |
| - | TX | |
| Clinical Social Worker | TX | |
| - | TX | |
| Nurse Practitioner | TX | |
| Orthopedic Surgery | TX | |
| Clinical Psychologist | TX |
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