MARNIN A MERRICK MD
NPI 1114132818
Internal Medicine - Hematology & Oncology in New Orleans, LA

Q: What is Marnin Merrick's NPI number?

The NPI number for Marnin Merrick is 1114132818. It was assigned to this individual provider in the NPPES registry on May 14, 2007.

Q: What is Marnin Merrick's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.

Q: When was this NPI record last updated?

The NPPES record for Marnin Merrick was last updated on April 28, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 months 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.

Active since May 14, 2007PECOS Enrolled

1430 TULANE AVE, SL-68, NEW ORLEANS, LA 70112(504) 988-6060(504) 988-6077 Get Directions Write a Review

NPPES record last updated: April 28, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

On this page

About Marnin A Merrick Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MARNIN A MERRICK MD (NPI 1114132818) is an individual hematology & oncology provider in New Orleans, Louisiana, licensed in Louisiana (MD.202844) and active in the NPI registry since May 2007. He is enrolled in Medicare PECOS and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1114132818

Entity TypeIndividualMale

Primary Taxonomy207RH0003X

Provider Legal NameMARNIN A MERRICKCredential: MD

Location Address1430 TULANE AVE, SL-68New Orleans, LA 70112-2632

Mailing Address5107 Citrus Blvd, Suite 309New Orleans, LA 70123-7148 · (606) 213-0275

Phone(504) 988-6060

Fax(504) 988-6077

Sole ProprietorNo

Enumeration DateMay 14, 2007

Last NPPES UpdateApril 28, 2025

NPPES CertifiedApril 28, 2025

✔ NPI 1114132818 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Hematology & OncologyAllopathic & Osteopathic Physicians

Taxonomy Code207RH0003X

License✔ Licensed in LA · MD.202844

Definition

An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered.

Also ListedRadiology · Radiation OncologyTaxonomy 2085R0001X · License 41160 (KY), MD.202844 (LA), 13495 (ND)

1430 TULANE AVE, New Orleans, LA 70112

Open in Google Maps ↗

Secondary Practice Locations 2

Location 1831 S BroadwayMinot, ND 58701-4636 · Phone (701) 418-8000

Location 22305 37th Ave SWMinot, ND 58701-7669 · Phone (701) 418-8000

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross Blue Shield of North Dakota, Providence Health Plan, Sanford Health Plan and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Marnin A Merrick Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show Marnin Merrick reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Baptist Health Medical Group Inc

469 mi

Rural Health

506 N 12TH ST STE A
Murray, KY 42071

Reassigned Medicare billing, Kentucky enrollment
1,441 clinicians in this Medicare group

NPI 1194471045 (270) 415-7055

Trinity Health

1,393 mi

Multi-Specialty

2305 37TH AVE SW
Minot, ND 58701

Reassigned Medicare billing, North Dakota enrollment
339 clinicians in this Medicare group

NPI 1083653752 (701) 857-5000

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 7

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.

Ct guidance for insertion of radiation therapy fields 77014

CT guidance for insertion of radiation therapy fields involves using a CT scan to accurately map the area of your body where radiation will be applied. This ensures the radiation targets only the necessary area, minimizing impact to healthy tissues.

336 services33 patients

Radiation treatment management, 5 treatment sessions 77427

Radiation treatment management involves a series of 5 sessions where targeted radiation is used to destroy or shrink cancer cells in your body. Each session is carefully planned to maximize effectiveness while minimizing harm to healthy tissues. You may experience side effects which will be closely monitored and managed for your comfort.

66 services29 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

58 services56 patients

Calculation of radiation therapy dose 77300

Radiation therapy dose calculation is a process to determine the exact amount of radiation needed to treat a specific area in the body. This calculation helps ensure the treatment is effective while minimizing harm to healthy tissues. It's a key part of planning your radiation therapy.

35 services12 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

32 services28 patients

Design and construction of complex radiation treatment device 77334

The design and construction of a complex radiation treatment device is a process where a specialized instrument is created. This device targets harmful cells with high-energy rays to destroy or damage them, while minimizing impact on healthy cells. This aids in treating conditions like cancer.

30 services16 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 70112 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$170.30 typical visit price

range $55.50 – $170.30

Typical copayment $42.57 (range $13.87 – $42.57)

Most-billed visit code 99205

Established Patient

$98.35 typical visit price

range $17.42 – $138.03

Typical copayment $24.58 (range $4.35 – $34.50)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

CARRIE ALINE STEWART M.D.

Urology

1430 TULANE AVE
NEW ORLEANS, LA 70112

Orleans Parish (256) 658-1406

DR. TONG WU M.D., PHD

Pathology (Anatomic Pathology)

1430 TULANE AVE
NEW ORLEANS, LA 70112

Orleans Parish (504) 988-5210

DR. PRINCESS ERONMWON DENNAR M.D.

Internal Medicine

1430 TULANE AVE, SL-16
NEW ORLEANS, LA 70112

Orleans Parish (504) 988-7518

DR. MARY CATHERINE PHELAN IV PH.D.

Medical Genetics, Ph.D. Medical Genetics

1430 TULANE AVE, SL31
NEW ORLEANS, LA 70112

Orleans Parish (504) 988-1050

ERIC GUSTAFSON M.D., M.P.H.

Internal Medicine

1430 TULANE AVE, SL-16
NEW ORLEANS, LA 70112

Orleans Parish (504) 988-7518

DR. MARGARETHA KLOK-VAN LEDDEN MD

Specialist

1430 TULANE AVE
NEW ORLEANS, LA 70112

Orleans Parish (504) 588-5458

JOSHUA PIERS LINHUBER MD

Internal Medicine

1430 TULANE AVE
NEW ORLEANS, LA 70112

Orleans Parish (504) 988-6191

JEFFREY RUTGARD M.D.

Ophthalmology

1430 TULANE AVE
NEW ORLEANS, LA 70112

Orleans Parish (504) 988-2261

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 Marnin Merrick's NPI number?

The NPI number for Marnin Merrick is 1114132818. It was assigned to this individual provider in the NPPES registry on May 14, 2007.

Where is Marnin Merrick located?

Marnin Merrick practices at 1430 Tulane Ave Sl-68, New Orleans, LA 70112. The listed phone number is (504) 988-6060.

What is Marnin Merrick's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.

Is Marnin Merrick enrolled in Medicare?

Yes. Marnin Merrick is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Marnin Merrick's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Marnin Merrick reassigns Medicare benefits to 2 organizations: Baptist Health Medical Group Inc (Murray, KY) and Trinity Health (Minot, ND). 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 Marnin Merrick's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Marnin Merrick accept?

Health plans from Blue Cross Blue Shield of North Dakota, Providence Health Plan, Sanford Health Plan and Select Health list Marnin Merrick 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.

When was this NPI record last updated?

The NPPES record for Marnin Merrick was last updated on April 28, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 months 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.