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DR. MARGUERITE ROSE O'FARRELL M.D.
NPI 1407090251
Emergency Medicine in Englewood, CO

Active since April 23, 2009PECOS Enrolled
91.74/100
CMS Quality Rating
501 E HAMPDEN AVE, ENGLEWOOD, CO 80113(303) 788-5000 Get Directions Write a Review

NPPES record last updated: December 29, 2016. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Dec 29, 2016, Feb 15, 2016 (2 updates tracked since 2016).

About Dr. Marguerite Rose O'farrell M.d. NPPES

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

DR. MARGUERITE ROSE O'FARRELL M.D. (NPI 1407090251) is an individual emergency medicine provider in Englewood, Colorado, licensed in Florida (ME113502) and active in the NPI registry since April 2009. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1407090251
Entity TypeIndividualFemale
Primary Taxonomy207P00000X
Provider Legal NameDR. MARGUERITE ROSE O'FARRELLCredential: M.D.
Location Address501 E HAMPDEN AVEEnglewood, CO 80113-2702
Mailing Address5600 S Quebec St, #312 AGreenwood Village, CO 80111-2207 · (303) 436-2727 · Fax (303) 436-2710
Phone(303) 788-5000
Sole ProprietorNo
Enumeration DateApril 23, 2009
Last NPPES UpdateDecember 29, 20162 updates tracked since enumeration
✔ NPI 1407090251 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
Licenses✔ Licensed in FL · ME113502✔ Licensed in CO · DR. 0057859
Definition
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.
501 E HAMPDEN AVE, Englewood, CO 80113
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Other Names 1

Former Name (1)Dr. Marguerite Rose Halphen Md

Other Identifiers 3

Medicare PINGG678ZFL
Other14L7TFL · Bcbs Fl
Medicaid0059699-00FL

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Oscar Health Maintenance Organization of Florida.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Marguerite Rose O'farrell M.d. 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

4

Medicare enrollment records show Marguerite O'farrell reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Panhandle Emergency Physicians A Div Of Sacred Heart Hosp Pensacola
1,186 mi
Emergency Medicine
5151 N 9TH AVE, ER
Pensacola, FL 32504
  • Reassigned Medicare billing, Florida enrollment
  • 108 clinicians in this Medicare group
NPI 1215948096 (850) 416-7000
Pensacola Emergency Physicians, LLC
1,193 mi
Emergency Medicine
123 BAPTIST WAY
Pensacola, FL 32503
  • Reassigned Medicare billing, Florida enrollment
  • 119 clinicians in this Medicare group
NPI 1801841473 (850) 434-4011
Baptist Physician Associates LLC
1,206 mi
Urgent Care
8888 NAVARRE PKWY STE 106
Navarre, FL 32566
  • Reassigned Medicare billing, Florida enrollment
  • 69 clinicians in this Medicare group
NPI 1235128646 (850) 908-8888
Emergency Medicine Services Of Fl, LLC
1,716 mi
Emergency Medicine
20900 BISCAYNE BLVD
Aventura, FL 33180
  • Reassigned Medicare billing, Florida enrollment
  • 1,912 clinicians in this Medicare group
NPI 1043917180 (305) 682-7000

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

Areas of Expertise CMS Part B claims 2

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Emergency department visit with high level of medical decision making 99285
An emergency department visit for severe conditions is when you urgently seek medical help due to serious health issues. These could be severe injuries, breathing problems, unbearable pain, or sudden severe illness. Doctors and nurses will provide immediate care to stabilize your condition.
64 services64 patients
Emergency department visit with moderate level of medical decision making 99284
An emergency department visit for a high-severity issue means you're experiencing a serious health problem that needs immediate attention. This could be a severe injury, serious illness, or life-threatening condition. Medical professionals will provide urgent care to stabilize your condition.
48 services48 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 80113 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
$89.43 typical visit price
range $58.06 – $174.82
Typical copayment $22.35 (range $14.51 – $43.70)
Most-billed visit code 99203
Established Patient
$102.03 typical visit price
range $18.88 – $142.79
Typical copayment $25.50 (range $4.72 – $35.69)
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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

91.74/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality85.98
Improvement Activities40

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.

KEVIN K JOHNSON MD
Radiology (Diagnostic Radiology)
501 E HAMPDEN AVE
ENGLEWOOD, CO 80113
Arapahoe County (303) 761-9190
MS. JANET RUTH DUBRICK NNP
Nurse Practitioner (Neonatal)
501 E HAMPDEN AVE, S 5556
ENGLEWOOD, CO 80113
Arapahoe County (303) 788-6515
ALIDA RAE NEAR M.D.
Anesthesiology
501 E HAMPDEN AVE
ENGLEWOOD, CO 80113
Arapahoe County (303) 788-6749
CHERYL A. MELICK MD
General Practice
501 E HAMPDEN AVE
ENGLEWOOD, CO 80113
Arapahoe County (303) 788-6911
DR. DENETTA SUE SLONE MD
Surgery
501 E HAMPDEN AVE
ENGLEWOOD, CO 80113
Arapahoe County (303) 788-5300
CLAIRE SAKAMOTO PA
Physician Assistant
501 E HAMPDEN AVE
ENGLEWOOD, CO 80113
Arapahoe County (303) 788-6911
HEALTHONE CLINIC SERVICES - SURGERY NEUROLOGICAL LLC
Neurological Surgery
501 E HAMPDEN AVE
ENGLEWOOD, CO 80113
Arapahoe County (303) 788-5000
DR. WILLIAM DUNFEE M.D.
Radiology (Diagnostic Radiology)
501 E HAMPDEN AVE
ENGLEWOOD, CO 80113
Arapahoe County (303) 761-9190

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Marguerite O'farrell's NPI number?

The NPI number for Marguerite O'farrell is 1407090251. It was assigned to this individual provider in the NPPES registry on April 23, 2009. The provider is also known as Dr. Marguerite Rose Halphen MD.

Where is Marguerite O'farrell located?

Marguerite O'farrell practices at 501 E Hampden Ave, Englewood, CO 80113. The listed phone number is (303) 788-5000.

What is Marguerite O'farrell's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Is Marguerite O'farrell enrolled in Medicare?

Yes. Marguerite O'farrell is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Marguerite O'farrell's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Marguerite O'farrell reassigns Medicare benefits to 4 organizations: Panhandle Emergency Physicians A Div Of Sacred Heart Hosp Pensacola (Pensacola, FL), Pensacola Emergency Physicians, LLC (Pensacola, FL), Baptist Physician Associates LLC (Navarre, FL) and Emergency Medicine Services Of Fl, LLC (Aventura, FL). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Marguerite O'farrell's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Marguerite O'farrell accept?

Health plans from Oscar Health Maintenance Organization of Florida list Marguerite O'farrell as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Marguerite O'farrell was last updated on December 29, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.