Elizabeth Hays Boyle Cassels, M.D.
Emergency Medicine Physician · Baton Rouge, LA
Elizabeth Hays Boyle Cassels, M.D. is an emergency medicine physician with a practice address in Baton Rouge, Louisiana, and NPI 1639533755, issued on Apr 6, 2016. Check the license (Louisiana 313471, as entered in NPPES) on the Louisiana State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Elizabeth Hays Boyle Cassels
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 313471 LA
Self-reported in NPPES; status is on the state search - Practice location
- 4256 Brittany Drive, Baton Rouge, LA 70808
- Phone
- (225) 757-4142
- Enumerated
- Apr 6, 2016
- Record last updated
- Aug 15, 2019 (not updated in 7 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20190907000286); accepts Medicare assignment
- Entity
- Type 1 · individual
Verify Elizabeth Hays Boyle Cassels in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersLouisiana State Board of Medical Examiners
Search for license 313471Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
38% fewer Medicare Part D claims than the average emergency medicine physician in 2024
141 Medicare Part D claims for 107 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 17 claims were for opioids.
Most prescribed
- Cyclobenzaprine Hcl19 claims
- Hydrocodone-Acetaminophen16 claims
- Cephalexin13 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 78.7 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $13.40
1 payment: food and beverage; the largest payer was Abbvie Inc. The 12,335 providers of this specialty with any payment received $953.79 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Red Stick Emergency Group LLCBaton Rouge, LA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
175 emergency medicine physician records list a practice address in Baton Rouge
They are 175 of the 12,526 NPPES records with a practice address in Baton Rouge, and 1,000 emergency medicine physician records in Louisiana.
All 175 in Baton Rouge → All 1,000 in Louisiana → Every provider in Baton Rouge →
Other emergency medicine physician records in Louisiana
- Yousef Abdulla, MDKaplan, LA1376122507
- Joseph Abraham, M.D.Lafayette, LA1629309000
- Evangeline Abriam, MDMetairie, LA1861581936
- Angela Adams, M.D.Alexandria, LA1356652895
- Brian Adams, M.D., M.P.H.Alexandria, LA1396006995
- Jerielle AdamsBaton Rouge, LA1174813018
- Kasi Addison, DOShreveport, LA1679034870
- Prateek Adhikari, M.D.New Orleans, LA1083788004
- Rohit Adi, MDBaton Rouge, LA1912012444
- Miguel Aguilera, M.D.Metairie, LA1598735334
Common questions
What is Elizabeth Hays Boyle Cassels, M.D.'s NPI number?
Elizabeth Hays Boyle Cassels, M.D.'s National Provider Identifier (NPI) is 1639533755, issued on Apr 6, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Elizabeth Hays Boyle Cassels, M.D. located?
The NPPES record lists a practice address at 4256 Brittany Drive, Baton Rouge, LA, 70808. Phone: (225) 757-4142. Providers update this record themselves, so call before visiting.
How can I verify Elizabeth Hays Boyle Cassels, M.D.'s license?
NPPES lists Louisiana license number 313471, as entered by the provider. Search the Louisiana State Board of Medical Examiners at https://www.lsbme.la.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Elizabeth Hays Boyle Cassels, M.D. prescribe under Medicare Part D?
In 2024, Elizabeth Hays Boyle Cassels, M.D. had 141 Medicare Part D claims for 107 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Elizabeth Hays Boyle Cassels, M.D.'s MIPS final score?
The 2023 MIPS final score is 78.7 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.