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JOHN DERRICK MARKER M.D.
NPI 1942477583
Hospitalist in New Orleans, LA

Active since May 13, 2008PECOS EnrolledAccepts Medicare Assignment
1430 TULANE AVE SL 50, NEW ORLEANS, LA 70112(504) 988-7809(504) 988-3971 Get Directions Write a Review

NPPES record last updated: April 3, 2017. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About John Derrick Marker M.d. NPPES

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

JOHN DERRICK MARKER M.D. (NPI 1942477583) is an individual hospitalist provider in New Orleans, Louisiana, licensed in Louisiana (MD.204045) and active in the NPI registry since May 2008. He is enrolled in Medicare PECOS, is affiliated with Ochsner Medical Center Acute, and is a graduate of Tulane University School Of Medicine (2008).

NPPES Registry Identity

NPI1942477583
Entity TypeIndividualMale
Primary Taxonomy208M00000X
Provider Legal NameJOHN DERRICK MARKERCredential: M.D.
Location Address1430 TULANE AVE SL 50New Orleans, LA 70112
Mailing Address1430 Tulane Ave Sl 50New Orleans, LA 70112 · (504) 988-7809 · Fax (504) 988-3971
Phone(504) 988-7809
Fax(504) 988-3971
Sole ProprietorYes
Medical School CMSTulane University School Of MedicineGraduated 2008
Enumeration DateMay 13, 2008
Last NPPES UpdateApril 3, 2017
✔ NPI 1942477583 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyHospitalistAllopathic & Osteopathic Physicians
Taxonomy Code208M00000X
License✔ Licensed in LA · MD.204045
Definition

Hospitalists are physicians whose primary professional focus is the general medical care of hospitalized patients. Their activities include patient care, teaching, research, and leadership related to Hospital Medicine. The term 'hospitalist' refers to physicians whose practice emphasizes providing care for hospitalized patients.

Also ListedInternal MedicineTaxonomy 207R00000X · License MD204045 (LA)
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
1430 TULANE AVE SL 50, New Orleans, LA 70112
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include CHRISTUS Health Plan, HMO Louisiana.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

John Derrick Marker M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID2365611126
PECOS Enrollment IDI20110811000558
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.

Areas of Expertise CMS Part B claims 6

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.

Follow-up hospital inpatient care per day, typically 35 minutes 99233
Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.
139 services68 patients
Hospital discharge day management, more than 30 minutes 99239
Hospital discharge day management over 30 minutes involves a detailed process to ensure a smooth transition from hospital to home. It includes final examinations, discussion of your hospital stay, post-discharge instructions, and coordinating follow-up care.
56 services53 patients
Follow-up hospital inpatient care per day, typically 25 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
44 services20 patients
Critical care, first 30-74 minutes 99291
Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.
19 services12 patients
Hospital observation care on day of discharge 99217
Hospital observation care on the day of discharge involves monitoring your health status to ensure stability before you leave. This includes assessing vital signs, response to treatment, and readiness for home care or rehabilitation.
16 services16 patients
Initial hospital inpatient care per day, typically 70 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
13 services13 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Ochsner Medical Center Acute

Acute Care Hospitals · New Orleans, LA
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number190036
Location1516 Jefferson HwyNew Orleans, LA 70121 · Jefferson County
Emergency services Birthing friendly

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
$128.88 typical visit price
range $55.50 – $170.30
Typical copayment $32.22 (range $13.87 – $42.57)
Most-billed visit code 99204
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

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

HENRY JOSEPH HEFLER MD
Internal Medicine (Gastroenterology)
1430 TULANE AVE SL 50
NEW ORLEANS, LA 70112
Orleans Parish (504) 988-7809

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 John Marker's NPI number?

The NPI number for John Marker is 1942477583. It was assigned to this individual provider in the NPPES registry on May 13, 2008.

Where is John Marker located?

John Marker practices at 1430 Tulane Ave Sl 50, New Orleans, LA 70112. The listed phone number is (504) 988-7809.

What is John Marker's specialty?

The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.

Is John Marker enrolled in Medicare?

Yes. John Marker is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does John Marker accept?

Health plans from CHRISTUS Health Plan and HMO Louisiana list John Marker 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.

Is John Marker affiliated with any hospitals?

According to CMS data, John Marker is affiliated with Ochsner Medical Center Acute.

When was this NPI record last updated?

The NPPES record for John Marker was last updated on April 3, 2017. NPI Profile syncs with the weekly NPPES data releases published by CMS.