DR. TATIANA AMBARUS MD
NPI 1326174715
Obstetrics & Gynecology in Newark, NJ
About Dr. Tatiana Ambarus Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. TATIANA AMBARUS MD (NPI 1326174715) is an individual obstetrics & gynecology provider in Newark, New Jersey, licensed in New Jersey (25MA08211500) and active in the NPI registry since February 2007. She is enrolled in Medicare PECOS, is affiliated with John T Mather Memorial Hospital Of Port Jefferson, and is a graduate of Other (1993).
NPPES Registry Identity
Specialties & Licenses
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. Tatiana Ambarus Md 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
7Medicare enrollment records show Tatiana Ambarus reassigns Medicare billing to 7 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Newark, NJ 07112
- Reassigned Medicare billing, New Jersey enrollment
- 79 clinicians in this Medicare group
Newark, NJ 07103
- Reassigned Medicare billing, New Jersey enrollment
- 50 clinicians in this Medicare group
Elizabeth, NJ 07202
- Reassigned Medicare billing, New Jersey enrollment
- 1,894 clinicians in this Medicare group
Livingston, NJ 07039
- Reassigned Medicare billing, New Jersey enrollment
- 1,913 clinicians in this Medicare group
Morristown, NJ 07960
- Reassigned Medicare billing, New Jersey enrollment
- 1,699 clinicians in this Medicare group
New Brunswick, NJ 08901
- Reassigned Medicare billing, New Jersey enrollment
- Medicare enrollment name: Saint Peters University Hospital
- 325 clinicians in this Medicare group
Port Jefferson Station, NY 11776
- Reassigned Medicare billing, New York enrollment
- 636 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
John T Mather Memorial Hospital Of Port Jefferson
Acute Care Hospitals · Port Jefferson, NYPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 07112 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
NEWARK, NJ 07112
NEWARK, NJ 07112
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 Tatiana Ambarus's NPI number?
The NPI number for Tatiana Ambarus is 1326174715. It was assigned to this individual provider in the NPPES registry on February 27, 2007.
Where is Tatiana Ambarus located?
Tatiana Ambarus practices at 201 Lyons Ave, Newark, NJ 07112. The listed phone number is (973) 926-7342.
What is Tatiana Ambarus's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.
Is Tatiana Ambarus enrolled in Medicare?
Yes. Tatiana Ambarus 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 Tatiana Ambarus's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Tatiana Ambarus reassigns Medicare benefits to 7 organizations: Newark Beth Israel Medical Center Inc (Newark, NJ), University Physician Associates Of New Jersey Inc (Newark, NJ), Barnabas Health Medical Group PC (Elizabeth, NJ), Rwjbh Observation Associates LLC (Livingston, NJ), Practice Associates Medical Group (Morristown, NJ) and 2 more organizations, listed in the Medicare section above. 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 Tatiana Ambarus's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Tatiana Ambarus accept?
Health plans from Oscar Health list Tatiana Ambarus 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 Tatiana Ambarus affiliated with any hospitals?
According to CMS data, Tatiana Ambarus is affiliated with John T Mather Memorial Hospital Of Port Jefferson.
When was this NPI record last updated?
The NPPES record for Tatiana Ambarus was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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. Tatiana Ambarus, MD · NPI 1326174715
Obstetrics & Gynecology physician in Newark, New Jersey. Individual provider, active in the CMS NPPES registry since February 27, 2007.
## Identity
- **NPI:** 1326174715 (Entity type: Individual)
- **Enumerated:** February 27, 2007
- **Primary specialty:** Obstetrics & Gynecology · taxonomy 207V00000X
- **State license:** 25MA08211500 (New Jersey)
- **Sole proprietor:** No
## Practice location
- **Address:** 201 LYONS AVE, Newark, NJ 07112-2027
- **Phone:** (973) 926-7342
## 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:** 7 organizations under Medicare reassignment (form CMS-855R): Newark Beth Israel Medical Center Inc (NPI 1033210323, Newark, NJ); University Physician Associates Of New Jersey Inc (NPI 1922018514, Newark, NJ); Barnabas Health Medical Group PC (NPI 1841557246, Elizabeth, NJ); Rwjbh Observation Associates LLC (NPI 1760095806, Livingston, NJ); Practice Associates Medical Group (NPI 1427016385, Morristown, NJ); and 2 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1993
## Record status
- **NPPES last updated:** July 8, 2007
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Source: [NPI Profile](https://npiprofile.com/npi/1326174715) · Data from the CMS NPPES public registry.