DR. BRIAN O'CONNOR MD
NPI 1174515050
Internal Medicine - Medical Oncology in Frederick, MD

Q: What is Brian O'connor's NPI number?

The NPI number for Brian O'connor is 1174515050. It was assigned to this individual provider in the NPPES registry on August 17, 2005.

Q: What is Brian O'connor's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Medical Oncology, with taxonomy code 207RX0202X.

Q: When was this NPI record last updated?

The NPPES record for Brian O'connor was last updated on May 15, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since August 17, 2005PECOS Enrolled

1562 OPOSSUMTOWN PIKE, FREDERICK, MD 21702(301) 662-8477 Get Directions Write a Review

NPPES record last updated: May 15, 2019. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: May 15, 2019, Oct 1, 2018 (2 updates tracked since 2018).

On this page

About Dr. Brian O'connor Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. BRIAN O'CONNOR MD (NPI 1174515050) is an individual medical oncology provider in Frederick, Maryland, licensed in Maryland (D31761) and active in the NPI registry since August 2005. He is enrolled in Medicare PECOS and maintains a secondary practice location in Frederick.

NPPES Registry Identity

NPI1174515050

Entity TypeIndividualMale

Primary Taxonomy207RX0202X

Provider Legal NameDR. BRIAN O'CONNORCredential: MD

Location Address1562 OPOSSUMTOWN PIKEFrederick, MD 21702-4337

Mailing AddressPo Box 37086Baltimore, MD 21297-3086 · (240) 439-8733 · Fax (240) 439-8910

Phone(301) 662-8477

Sole ProprietorNo

Enumeration DateAugust 17, 2005

Last NPPES UpdateMay 15, 20192 updates tracked since enumeration

✔ NPI 1174515050 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Medical OncologyAllopathic & Osteopathic Physicians

Taxonomy Code207RX0202X

License✔ Licensed in MD · D31761

Definition

An internist who specializes in the diagnosis and treatment of all types of cancer and other benign and malignant tumors. This specialist decides on and administers therapy for these malignancies as well as consults with surgeons and radiotherapists on other treatments for cancer.

Also ListedInternal Medicine · Hematology & OncologyTaxonomy 207RH0003X · License D0031761 (MD)

1562 OPOSSUMTOWN PIKE, Frederick, MD 21702

Open in Google Maps ↗

Secondary Practice Location 1

Location 1501 W 7th St, Suite 1AFrederick, MD 21701-4507 · Phone (301) 662-8477 · Fax (301) 662-4293

Other Identifiers 5

OtherW575-0002Carefirst Bcbs Ghmsi

Other971641United

Other28658979Aetna Pvn

Other523014-01Carefirst Bcbs Maryland

Medicaid81961100MD

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Brian O'connor Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show Brian O'connor reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Frederick Health Medical Group LLC

Same address

Medical Oncology

1562 OPOSSUMTOWN PIKE STE 102
Frederick, MD 21702

Reassigned Medicare billing, Maryland enrollment
245 clinicians in this Medicare group

NPI 1063780633 (301) 662-8477

Frederick Health Hospital Inc

Same address

Oncology, Radiation

1562 OPOSSUMTOWN PIKE STE 101
Frederick, MD 21702

Reassigned Medicare billing, Maryland enrollment
9 clinicians in this Medicare group

NPI 1891154100 (240) 566-4500

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 21702 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$175.57 typical visit price

range $57.99 – $175.57

Typical copayment $43.89 (range $14.49 – $43.89)

Most-billed visit code 99205

Established Patient

$102.11 typical visit price

range $18.66 – $143.02

Typical copayment $25.52 (range $4.66 – $35.75)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Referred Medical Equipment & Supplies CMS DME claims 3

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Portable gaseous oxygen system, rental; includes portable container, regulator, flowmeter, humidifier, cannula or mask, and tubing E0431

DME-Oxygen and Supplies · category DC000N

1 supplier11 claims11 services$13.37 avg. paid by Medicare

Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate E1390

DME-Oxygen and Supplies · category DC002N

1 supplier11 claims11 services$62.45 avg. paid by Medicare

Injection, immune globulin, (gammagard liquid), non-lyophilized, (e.g., liquid), 500 mg J1569

Treatment-Injections and Infusions (nononcologic) · category RI008N

1 supplier13 claims1,040 services$35.69 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MS. JEANETTE E FORONDA P.A.

Physician Assistant