WILLIAM C SUMMERS (MD) – Internal Medicine Physician, NPI 1265471650
Internal Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
4,186 INTERNAL MEDICINE in MO
Provider Addresses for WILLIAM C SUMMERS (MD)
6188 MacKenzie Valley Ct
Saint Louis, MO 631233477
Phone: (314) 686-9714
Fax: (888) 464-1108
Type: Location
3915 WATSON RD STE 202
SAINT LOUIS, MO 631091251
Phone: (314) 244-3818
Fax: (888) 464-1108
Type: Mailing
6188 MACKENZIE VALLEY CT
SAINT LOUIS, MO 631233477
Phone: (314) 686-9714
Fax: (833) 529-0574
Type: Mailing
3915, Watson Road, Lindenwood Park, St. Louis, Missouri, 63109, United States
SUITE 101
ST LOUIS, MO 630192935
Phone: (314) 833-4001
Fax: (314) 228-0488
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 159 Open Payments records for all available years, with a total value of $23,109.
Total Amount is formed as General ($23,109) + Research ($0) + Ownership ($0) = $23,109.
Last reported payment date: 2024-12-19 • Largest payer in this snapshot: Gilead Sciences, Inc. ($21,846).
Total Amount
$23,109
General + Research + Ownership
Payments
159
Total payment records
General Amount
$23,109
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-19
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Gilead Sciences, Inc. | $21,846 |
| ViiV Healthcare Company | $448 |
| AstraZeneca Pharmaceuticals LP | $214 |
| GlaxoSmithKline, LLC. | $175 |
| Novo Nordisk Inc | $108 |
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: 2007-07-24
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 |
|---|---|---|---|---|
| I20070724000735 | I | Internal Medicine | MO | 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 | 310 | 94 | $0 |
| 81002 | Urinalysis, manual test | 67 | 50 | $0 |
| 99205 | New patient office or other outpatient visit, 60-74 minutes | 46 | 46 | $0 |
| 99215 | Established patient office or other outpatient visit, 40-54 minutes | 39 | 33 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 33 | 24 | $0 |
Insurance plans in this area (ZIP 63123)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| INTERNAL MEDICINE | MO | 83036 | Hemoglobin A1C level | 29 | 24 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| Physician Assistant | MO |
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