Physician Profile
Gerard Stephen O'Connor, M.D.
Unclaimed ProfileAbout Dr. O'connor
Gerard Stephen O'Connor, M.D. is a healthcare provider in Chestertown, MD specializing in general surgery. Gerard trained at Georgetown University School of Medicine, graduating in 1978. Gerard is also listed as specializing in specialist and family medicine. Medicare claims data shows Gerard provided 479 services to 461 patients.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Specialty
Credentials & Licensing
Source: NPPES NPI Registry
Contact Information
- (410) 778-6303
- Email not available
Practice Locations
100 BROWN ST
Chestertown, MD 21620
Conditions Commonly Evaluated or Treated
Within General Surgery generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
Procedures & services
Most searched procedures
Procedures Most Often Billed to Medicare
479 services · 461 patients · 9 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more | Office visit | 99203 |
95 |
| Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more | Office visit | 99212 |
91 |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
70 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
50 |
| Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus and influenza | Lab test | 87428 |
42 |
| Automated urinalysis test | Lab test | 81003 |
41 |
| New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more | Office visit | 99204 |
39 |
| Detection test by immunoassay technique for streptococcus, group a (strep) | Lab test | 87430 |
34 |
| Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus | Lab test | 87426 |
17 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Trained at Georgetown University School of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 1978 at Georgetown University School of Medicine 8
Providers who graduated from the same medical school in the same year.
Common questions
What does Dr. O'Connor specialize in?
Dr. O'Connor is a general surgeon in Chestertown, MD. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “GENERAL SURGERY”.
NPI registry
Where is Dr. O'Connor located?
Dr. O'Connor is listed at 100 BROWN ST, Chestertown, MD 21620. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. O'Connor's phone number?
The number on file is (410) 778-6303. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. O'Connor?
Dr. O'Connor's National Provider Identifier is 1609879873. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. O'Connor go to medical school?
Dr. O'Connor attended Georgetown University School of Medicine, graduating in 1978. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. O'Connor have?
Dr. O'Connor has 48 years experience. Calculated from a graduation year of 1978, reported in the CMS National Downloadable File.
CMS public data
What does Dr. O'Connor do most often?
According to Medicare billing data, Dr. O'Connor the Medicare record under this individual NPI shows mainly office visits and diagnostic testing. Hospital-based physicians usually have their procedural work billed by the facility rather than under their own number, so this is a floor on their practice, not a description of it. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. O'Connor's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. O'Connor. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.