DR. CHARLES JOSEPH RENNER (M.D.) – Family Medicine Physician, NPI 1669439733
Family Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
21,511 INTERNAL MEDICINE in CA
Provider Addresses for DR. CHARLES JOSEPH RENNER (M.D.)
5161 Clayton Rd Ste F
Concord, CA 94521
Phone: (925) 609-8282
Type: Location
Treat Boulevard, Walnut Creek, Contra Costa County, California, 94519, United States
WALNUT CREEK, CA 945972168
Phone: (925) 952-2888
Type: Mailing
5161, Clayton Road, Concord, Contra Costa County, California, 94521, United States
SUITE C
CONCORD, CA 94521
Phone: (925) 687-2200
Fax: (925) 689-5608
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 $12.
Total Amount is formed as General ($12) + Research ($0) + Ownership ($0) = $12.
Last reported payment date: 2023-08-25 • Largest payer in this snapshot: Watermark Medical, Inc. ($12).
Total Amount
$12
General + Research + Ownership
Payments
1
Total payment records
General Amount
$12
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2023-08-25
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Watermark Medical, Inc. | $12 |
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: 2010-08-05
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 |
|---|---|---|---|---|
| I20100805000473 | I | Family Practice | CA | 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 | 274 | 184 | $0 |
| G0439 | Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 119 | 119 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 114 | 97 | $0 |
| 90694 | Influenza vaccine, quadrivalent inactivated, 0.5 ml dosage | 48 | 48 | $0 |
| G0008 | Administration of influenza virus vaccine | 48 | 48 | $0 |
Insurance plans in this area (ZIP 94521)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| FAMILY MEDICINE | CA | 81002 | Urinalysis, manual test | 28 | 20 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| Internal Medicine, Pediatric Medicine | CA | |
| Family Practice | CA | |
| - | CA | |
| - | CA | |
| U R O L O G Y | CA | |
| Internal Medicine, Hospitalist | CA | |
| - | CA | |
| Internal Medicine | CA | |
| Hospice/Palliative Care, Internal Medicine | CA | |
| Physician Assistant | CA |
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