Gregory William Cotter, M.D.
Radiation Oncology Physician · Baton Rouge, LA
Gregory William Cotter, M.D. is a radiation oncology physician with a practice address in Baton Rouge, Louisiana, and NPI 1659363067, issued on Aug 22, 2005. Check the license (Louisiana 308265, as entered in NPPES) on the Louisiana State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Gregory William Cotter
- Credential
- M.D.
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License numbers
- 308265 LA
9773 AL
15829 MS
11773 SC
47775 TN
Self-reported in NPPES; status is on the state search - Practice location
- 4950 Essen LN Ste 500, Baton Rouge, LA 70809
- Phone
- (225) 767-0847
- Enumerated
- Aug 22, 2005
- Record last updated
- Feb 6, 2024
- Fax
- (225) 767-1335
- Medicaid IDs
- 00011136 MS
000016332 AL
1528979 TN - Medicare enrollment
- Enrolled (PECOS I20120719000392); accepts Medicare assignment
- Medical or professional school
- University Of South Alabama College Of Medicine, 1980
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 66 in Louisiana → Look up another NPI →
Also registered at 4950 Essen LN Ste 500
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Constance Blunt, M.D.Medical Oncology Physician1710245162
- Andrew Dalovisio, M.D.Hematology & Oncology Physician1144458704
- Taylor DannaFamily Nurse Practitioner1306593488
- Andrew Faucheux, MDHematology & Oncology Physician1619535689
- Jessica Gaubert, NPGerontology Nurse Practitioner1942830682
- Ghenet Ghebretatios, N.P.Family Nurse Practitioner1356598031
Verify Gregory William Cotter in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersLouisiana State Board of Medical Examiners
Search for license 308265Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
22% fewer Medicare Part D claims than the average radiation oncology physician in 2024
104 Medicare Part D claims for 40 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 26 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen25 claims
- Tamsulosin Hcl25 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.
Bills Medicare through one group practice
- Mary Bird Perkins Cancer CenterNatchez, MS
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregory William Cotter among 66 radiation oncology physician records in Louisiana
Gregory William Cotter, M.D. is one of 66 radiation oncology physician records with a practice address in Louisiana. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 94% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated1980 · median 2008 among the 49 with a school on file
- Record last updated2024 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0001X and a Louisiana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Radiation Oncology Physician providers in Louisiana
There are 66 radiation oncology physician records in Louisiana.
All 66 in Louisiana → Every provider in Baton Rouge → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Michael Dzeda, M.D.Baton Rouge, LA 708091659318129
- Andrew Elson, MDBaton Rouge, LA 708091649596107
- Gregory Henkelmann, MDBaton Rouge, LA 708091639264237
- Maurice King, M.D.Baton Rouge, LA 708091194817411
- Maurice King, MDBaton Rouge, LA 708091629497888
- Konstantin Kovtun, M.D.Baton Rouge, LA 708091528406832
- Renee Levine, M.D.Baton Rouge, LA 708091811095102
- Kenneth Lo, MDBaton Rouge, LA 708091700897220
Common questions
What is Gregory William Cotter, M.D.'s NPI number?
Gregory William Cotter, M.D.'s National Provider Identifier (NPI) is 1659363067, issued on Aug 22, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Gregory William Cotter, M.D. located?
The NPPES record lists a practice address at 4950 Essen LN Ste 500, Baton Rouge, LA, 70809. Phone: (225) 767-0847. Providers update this record themselves, so call before visiting.
How can I verify Gregory William Cotter, M.D.'s license?
NPPES lists Louisiana license number 308265, 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 Gregory William Cotter, M.D. prescribe under Medicare Part D?
In 2024, Gregory William Cotter, M.D. had 104 Medicare Part D claims for 40 beneficiaries; the average among radiation oncology physician prescribers was 134. Part D covers Medicare prescriptions only.
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.