DR. BRIAN O'CONNOR (MD) – Medical Oncology Physician, NPI 1174515050
Medical Oncology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
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Provider Addresses for DR. BRIAN O'CONNOR (MD)
FMH Rose Hill, 1562, Opossumtown Pike, Spring Valley, Frederick, Frederick County, Maryland, 21702-3077, United States
FREDERICK, MD 217024337
Phone: (301) 662-8477
Type: Location
501 W 7th St
Suite 1A
Frederick, MD 217014507
Phone: (301) 662-8477
Fax: (301) 662-4293
Type: Location
PO BOX 37086
BALTIMORE, MD 212973086
Phone: (240) 439-8733
Fax: (240) 439-8910
Type: Mailing
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.
This can happen when there are no reportable CMS Open Payments records.
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: 2010-04-05
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 |
|---|---|---|---|---|
| I20100405000010 | I | Hematology/Oncology | 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.
No Medicare fee-for-service utilization data available for this provider in our database.
Insurance plans in this area (ZIP 21702)
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Provider's Procedures
Group practice members
| Name | Specialty | State |
|---|---|---|
| - | MD | |
| Internal Medicine | MD | |
| Gastroenterology, Internal Medicine | MD | |
| Physician Assistant | MD | |
| Nurse Practitioner | PA | |
| - | MD | |
| - | IL | |
| - | MD | |
| Family Practice | MD | |
| - | MD |
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