DR. GERARD STEPHEN O'CONNOR (M.D.) – Family Medicine Physician, NPI 1609879873
Family Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
827 GENERAL SURGERY in MD
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Provider Addresses for DR. GERARD STEPHEN O'CONNOR (M.D.)
University of Maryland Shore Medical Center at Chestertown, 100, Brown Street, Mile Tree Village, Chestertown, Kent County, Maryland, 21620, United States
CHESTERTOWN, MD 216201435
Phone: (410) 778-6303
Fax: (410) 778-6306
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)
No Open Payments data available for this provider.
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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: 2009-05-27
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 |
|---|---|---|---|---|
| I20090527000305 | I | General Surgery | MD | 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 |
|---|---|---|---|---|
| 99203 | New patient office or other outpatient visit, 30-44 minutes | 106 | 106 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 91 | 77 | $0 |
| 87428 | Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus and influenza | 84 | 78 | $0 |
| 99204 | New patient office or other outpatient visit, 45-59 minutes | 54 | 54 | $0 |
| 87430 | Detection test by immunoassay technique for streptococcus, group a (strep) | 33 | 32 | $0 |
Insurance plans in this area (ZIP 21620)
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Provider's Procedures
Group practice members
| Name | Specialty | State |
|---|---|---|
| Nurse Practitioner | MD | |
| Nurse Practitioner | NJ | |
| Nurse Practitioner | MD |
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