Marnin A. Merrick, MD
Hematology & Oncology Physician · New Orleans, LA
Marnin A. Merrick, MD is a hematology & oncology physician with a practice address in New Orleans, Louisiana, and NPI 1114132818, issued on May 14, 2007. Check the license (Louisiana MD.202844, as entered in NPPES) on the Louisiana State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Marnin A. Merrick
- Credential
- MD
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License numbers
- MD.202844 LA
41160 KY
13495 ND
Self-reported in NPPES; status is on the state search - Practice location
- 1430 Tulane Ave, New Orleans, LA 70112
- Phone
- (504) 988-6060
- Enumerated
- May 14, 2007
- Record last updated
- Apr 28, 2025
- Fax
- (504) 988-6077
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 188 in Louisiana → Look up another NPI →
Also registered at 1430 Tulane Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Marnin A. Merrick in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersLouisiana State Board of Medical Examiners
Search for license MD.202844Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average hematology & oncology physician in 2024
21 Medicare Part D claims, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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.
Industry payments in 2024: $1,536.89
8 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 8,560 providers of this specialty with any payment received $7,481.41 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.
Marnin A. Merrick among 188 hematology & oncology physician records in Louisiana
Marnin A. Merrick, MD is one of 188 hematology & oncology physician records with a practice address in Louisiana. 89% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 49% of them.
- NPI issued2007 · 49% of these records are older, 40% newer
- In a Medicare fileYes · 89% of these records are
- In the CMS Doctors and Clinicians fileNo · 77% of these records are
- Record last updated2025 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a Louisiana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology & Oncology Physician providers in Louisiana
There are 188 hematology & oncology physician records in Louisiana.
All 188 in Louisiana → Every provider in New Orleans → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Rajasree Chowdry, MDNew Orleans, LA 701121013234079
- Bridgette Collins Burow, M.D.New Orleans, LA 701121942478805
- Elizabeth EllentNew Orleans, LA 701121770825549
- Stefan Grant, M.D.New Orleans, LA 701121407979032
- Maissaa JanbainNew Orleans, LA 701121962668707
- Jodi Layton, M.D.New Orleans, LA 701121487834552
- Cindy LeissingerNew Orleans, LA 701121700839933
- Michelle Loch, M.DNew Orleans, LA 701121992918171
Common questions
What is Marnin A. Merrick, MD's NPI number?
Marnin A. Merrick, MD's National Provider Identifier (NPI) is 1114132818, issued on May 14, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Marnin A. Merrick, MD located?
The NPPES record lists a practice address at 1430 Tulane Ave, New Orleans, LA, 70112. Phone: (504) 988-6060. Providers update this record themselves, so call before visiting.
How can I verify Marnin A. Merrick, MD's license?
NPPES lists Louisiana license number MD.202844, 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 Marnin A. Merrick, MD prescribe under Medicare Part D?
In 2024, Marnin A. Merrick, MD had 21 Medicare Part D claims; the average among hematology & oncology physician prescribers was 877. 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.