DR. WILLIAM CASEY FREW M.D.
NPI 1740556000
Emergency Medicine in Marrero, LA
About Dr. William Casey Frew M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. WILLIAM CASEY FREW M.D. (NPI 1740556000) is an individual emergency medicine provider in Marrero, Louisiana, licensed in Louisiana (207465) and active in the NPI registry since March 2012. He is enrolled in Medicare PECOS, is affiliated with St Bernard Parish Hospital, and is a graduate of University Of Alabama School Of Medicine (2008).
NPPES Registry Identity
Specialties & Licenses
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. William Casey Frew M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
16Medicare enrollment records show William Frew reassigns Medicare billing to 16 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Marrero, LA 70072
- Reassigned Medicare billing, Louisiana enrollment
- 4,559 clinicians in this Medicare group
New Orleans, LA 70115
- Reassigned Medicare billing, Louisiana enrollment
- 240 clinicians in this Medicare group
Chalmette, LA 70043
- Reassigned Medicare billing, Louisiana enrollment
- 82 clinicians in this Medicare group
Kenner, LA 70065
- Reassigned Medicare billing, Louisiana enrollment
- 181 clinicians in this Medicare group
Luling, LA 70070
- Reassigned Medicare billing, Louisiana enrollment
- 114 clinicians in this Medicare group
La Place, LA 70068
- Reassigned Medicare billing, Louisiana enrollment
- 120 clinicians in this Medicare group
Raceland, LA 70394
- Reassigned Medicare billing, Louisiana enrollment
- 32 clinicians in this Medicare group
Thibodaux, LA 70301
- Reassigned Medicare billing, Louisiana enrollment
- 104 clinicians in this Medicare group
Morgan City, LA 70380
- Reassigned Medicare billing, Louisiana enrollment
- 95 clinicians in this Medicare group
Breaux Bridge, LA 70517
- Reassigned Medicare billing, Louisiana enrollment
- 69 clinicians in this Medicare group
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 4
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.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
St Bernard Parish Hospital
Acute Care Hospitals · Chalmette, LAOchsner St Martin Hospital
Critical Access Hospitals · Breaux Bridge, LAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 70072 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 12
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
MARRERO, LA 70072
MARRERO, LA 70072
MARRERO, LA 70072
MARRERO, LA 70072
MARRERO, LA 70072
MARRERO, LA 70072
MARRERO, LA 70072
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 William Frew's NPI number?
The NPI number for William Frew is 1740556000. It was assigned to this individual provider in the NPPES registry on March 30, 2012.
Where is William Frew located?
William Frew practices at 1101 Medical Center Blvd. ER, Marrero, LA 70072. The listed phone number is (504) 349-1533.
What is William Frew's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is William Frew enrolled in Medicare?
Yes. William Frew is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for William Frew's services?
According to the CMS Revalidation Reassignment List (October 2026 release), William Frew reassigns Medicare benefits to 16 organizations: Ochsner Clinic LLC (Marrero, LA), Belle Chasse Emergency Group LLC (New Orleans, LA), St. Bernard Emergency Group, LLC (Chalmette, LA), Kenner Emergency Group LLC (Kenner, LA), Luling Emergency Group LLC (Luling, LA) and 11 more organizations, listed in the Medicare section above. 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 William Frew's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does William Frew accept?
Health plans from Arkansas Blue Cross and Blue Shield, CHRISTUS Health Plan, HMO Louisiana, Health Advantage and Octave list William Frew 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.
Is William Frew affiliated with any hospitals?
According to CMS data, William Frew is affiliated with St Bernard Parish Hospital and Ochsner St Martin Hospital.
When was this NPI record last updated?
The NPPES record for William Frew was last updated on July 23, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.
# Dr. William Casey Frew, M.D. · NPI 1740556000
Emergency Medicine physician in Marrero, Louisiana. Individual provider, active in the CMS NPPES registry since March 30, 2012.
## Identity
- **NPI:** 1740556000 (Entity type: Individual)
- **Enumerated:** March 30, 2012
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 207465 (Louisiana)
- **Sole proprietor:** No
## Practice location
- **Address:** 1101 MEDICAL CENTER BLVD., ER, Marrero, LA 70072
- **Phone:** (504) 349-1533 · **Fax:** (504) 349-1530
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 16 organizations under Medicare reassignment (form CMS-855R): Ochsner Clinic LLC (NPI 1629478409, Marrero, LA); Belle Chasse Emergency Group LLC (NPI 1851714075, New Orleans, LA); St. Bernard Emergency Group, LLC (NPI 1306386685, Chalmette, LA); Kenner Emergency Group LLC (NPI 1013986546, Kenner, LA); Luling Emergency Group LLC (NPI 1528446101, Luling, LA); and 11 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Alabama School Of Medicine, class of 2008
## Record status
- **NPPES last updated:** July 23, 2015
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Source: [NPI Profile](https://npiprofile.com/npi/1740556000) · Data from the CMS NPPES public registry.