WILLIAM R JR. HERZOG (MD) – Interventional Cardiology Physician, NPI 1902873979
Interventional Cardiology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
790 CARDIOVASCULAR DISEASE (CARDIOLOGY) in MD
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Provider Addresses for WILLIAM R JR. HERZOG (MD)
Michael’s Deli Café, 10710, Charter Drive, Howard County Medical plaza, Harper's Choice, Columbia, Howard County, Maryland, 21044, United States
SUITE 400
COLUMBIA, MD 210442858
Phone: (410) 997-7979
Fax: (410) 997-9231
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 4 Open Payments records for all available years, with a total value of $69.
Total Amount is formed as General ($69) + Research ($0) + Ownership ($0) = $69.
Last reported payment date: 2023-11-28 • Largest payer in this snapshot: Medtronic, Inc. ($32).
Total Amount
$69
General + Research + Ownership
Payments
4
Total payment records
General Amount
$69
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2023-11-28
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Medtronic, Inc. | $32 |
| Cardiovascular Systems Inc. | $20 |
| ShockWave Medical, Inc | $18 |
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: 2018-01-03
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 |
|---|---|---|---|---|
| I20180103002686 | I | Cardiovascular Disease (Cardiology) | NC | 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 |
|---|---|---|---|---|
| 93000 | Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | 134 | 114 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 132 | 100 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 41 | 39 | $0 |
| 93306 | Ultrasound of heart with color-depicted blood flow, rate, direction and valve function | 38 | 38 | $0 |
| 93458 | Insertion of tube in left lower heart chamber and coronary artery for diagnosis with review by radiologist | 24 | 24 | $0 |
Insurance plans in this area (ZIP 21044)
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Provider's Procedures
Group practice members
| Name | Specialty | State |
|---|---|---|
| - | NC | |
| Nurse Practitioner | NC | |
| Internal Medicine, Pulmonary Disease | NC | |
| Internal Medicine, Cardiovascular Disease (Cardiology) | NC | |
| - | NC | |
| Nurse Practitioner | NC | |
| - | NC | |
| Nurse Practitioner | NC | |
| - | NC | |
| Nurse Practitioner | NC |
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