Cornelius E. Regan, MD
Retina Specialist (Ophthalmology) Physician · Hattiesburg, MS
Cornelius E. Regan, MD is a retina specialist (ophthalmology) physician with a practice address in Hattiesburg, Mississippi, and NPI 1508220252, issued on Apr 8, 2016. Check the license (Mississippi 27509, as entered in NPPES) on the Mississippi State Board of Medical Licensure; the Medicare figures below come from public CMS files.
- Name
- Cornelius E. Regan
- Credential
- MD
- Primary taxonomy
- Retina Specialist (Ophthalmology) Physician 207WX0107X
- License numbers
- 27509 MS
60893 TN
Self-reported in NPPES; status is on the state search - Practice location
- 109 Millsaps Dr Ste B, Hattiesburg, MS 39402
- Phone
- (601) 255-0736
- Enumerated
- Apr 8, 2016
- Record last updated
- Dec 28, 2022
- Medicaid ID
- 000559073 MS
- Medicare enrollment
- Enrolled (PECOS I20200608000788); accepts Medicare assignment
- Medical or professional school
- Louisiana State University School Of Medicine In New Orleans, 2016
- Entity
- Type 1 · individual
Also registered at 109 Millsaps Dr Ste B
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sean Allison, M.D.Retina Specialist (Ophthalmology) Physician1467621524
- Martin Thomley, MDRetina Specialist (Ophthalmology) Physician1679558357
Verify Cornelius E. Regan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMississippi State Board of Medical Licensure
Search for license 27509Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
24% fewer Medicare Part D claims than the average retina specialist (ophthalmology) physician in 2024
470 Medicare Part D claims for 116 beneficiaries, against an average of 620 among the 1,449 providers of this specialty who prescribed in Part D. Brand-name drugs were 36% of claims.
Most prescribed
- Prednisolone Acetate123 claims
- Latanoprost95 claims
- Ofloxacin64 claims
- Brimonidine Tartrate47 claims
- Dorzolamide-Timolol47 claims
- Timolol Maleate33 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): 100 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: $21.06
1 payment: food and beverage; the largest payer was Genentech USA, Inc. The 1,253 providers of this specialty with any payment received $7,667.49 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
- Retina Specialists OF Mississippi, PLLCHattiesburg, MS
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Retina Specialist (Ophthalmology) Physician providers in Mississippi
There are 12 retina specialist (ophthalmology) physician records in Mississippi.
Other retina specialist (ophthalmology) physician records in Mississippi
- Sean Allison, M.D.Hattiesburg, MS1467621524
- Anne Baranano, M.D.Biloxi, MS1295937183
- Michael Borne, M.D.Jackson, MS1588750178
- James Brown, M.D.Jackson, MS1528096971
- Jorge Calzada, M.D.Southaven, MS1538154117
- Joel Herring, M.D.Jackson, MS1831286699
- Veronica Kon Graversen, M.D.Madison, MS1467773838
- Wright Lauten, MDHattiesburg, MS1174781231
- Albert Lin, M.D.Jackson, MS1669760385
- Martin Thomley, MDHattiesburg, MS1679558357
Common questions
What is Cornelius E. Regan, MD's NPI number?
Cornelius E. Regan, MD's National Provider Identifier (NPI) is 1508220252, issued on Apr 8, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Cornelius E. Regan, MD located?
The NPPES record lists a practice address at 109 Millsaps Dr Ste B, Hattiesburg, MS, 39402. Phone: (601) 255-0736. Providers update this record themselves, so call before visiting.
How can I verify Cornelius E. Regan, MD's license?
NPPES lists Mississippi license number 27509, as entered by the provider. Search the Mississippi State Board of Medical Licensure at https://www.msbml.ms.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Cornelius E. Regan, MD prescribe under Medicare Part D?
In 2024, Cornelius E. Regan, MD had 470 Medicare Part D claims for 116 beneficiaries; the average among retina specialist (ophthalmology) physician prescribers was 620. Part D covers Medicare prescriptions only.
What is Cornelius E. Regan, MD's MIPS final score?
The 2023 MIPS final score is 100 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.