DR. MARK JACK DER MESROPIAN D.O.
NPI 1124309349
Anesthesiology in Long Branch, NJ
About Dr. Mark Jack Der Mesropian D.o. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARK JACK DER MESROPIAN D.O. (NPI 1124309349) is an individual anesthesiology provider in Long Branch, New Jersey, licensed in New Jersey (25MB10061600) and active in the NPI registry since September 2011. He is enrolled in Medicare PECOS, is affiliated with Monmouth Medical Center, and maintains a secondary practice location in Brooklyn.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Mark Jack Der Mesropian D.o. 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.
Medicare Billing Reassignments
2Medicare enrollment records show Mark Der Mesropian reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Brooklyn, NY 11211
- Reassigned Medicare billing, New York enrollment
- 1,074 clinicians in this Medicare group
Livingston, NJ 07039
- Reassigned Medicare billing, New Jersey enrollment
- 1,913 clinicians in this Medicare group
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 2
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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Monmouth Medical Center
Acute Care Hospitals · Long Branch, NJMedicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
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.
LONG BRANCH, NJ 07740
LONG BRANCH, NJ 07740
LONG BRANCH, NJ 07740
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 Mark Der Mesropian's NPI number?
The NPI number for Mark Der Mesropian is 1124309349. It was assigned to this individual provider in the NPPES registry on September 1, 2011.
Where is Mark Der Mesropian located?
Mark Der Mesropian practices at 300 2nd Ave, Long Branch, NJ 07740. The listed phone number is (732) 222-5200.
What is Mark Der Mesropian's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Mark Der Mesropian enrolled in Medicare?
Yes. Mark Der Mesropian 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.
Which organizations bill Medicare for Mark Der Mesropian's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mark Der Mesropian reassigns Medicare benefits to 2 organizations: New York University (Brooklyn, NY) and Rwjbh Observation Associates LLC (Livingston, NJ). 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 Mark Der Mesropian's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Mark Der Mesropian accept?
Health plans from Ambetter Health and Ambetter Health of Delaware list Mark Der Mesropian 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 Mark Der Mesropian affiliated with any hospitals?
According to CMS data, Mark Der Mesropian is affiliated with Monmouth Medical Center.
When was this NPI record last updated?
The NPPES record for Mark Der Mesropian was last updated on January 23, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years 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.
# Dr. Mark Jack Der Mesropian, D.O. · NPI 1124309349
Anesthesiology physician in Long Branch, New Jersey. Individual provider, active in the CMS NPPES registry since September 1, 2011.
## Identity
- **NPI:** 1124309349 (Entity type: Individual)
- **Enumerated:** September 1, 2011
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** 25MB10061600 (New Jersey)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 300 2ND AVE, Long Branch, NJ 07740-6303
- **Phone:** (732) 222-5200
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): New York University (NPI 1801030630, Brooklyn, NY); Rwjbh Observation Associates LLC (NPI 1760095806, Livingston, NJ) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2009
## Record status
- **NPPES last updated:** January 23, 2023
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Source: [NPI Profile](https://npiprofile.com/npi/1124309349) · Data from the CMS NPPES public registry.