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MERSEMA TESFAYE ABATE MD
NPI 1497950133
Internal Medicine - Nephrology in East Setauket, NY

Active since June 20, 2007PECOS EnrolledAccepts Medicare Assignment
26 RESEARCH WAY, EAST SETAUKET, NY 11733(631) 444-0580(631) 444-0562 Get Directions Write a Review

NPPES record last updated: June 23, 2009. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Mersema Tesfaye Abate Md NPPES

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

MERSEMA TESFAYE ABATE MD (NPI 1497950133) is an individual nephrology provider in East Setauket, New York, licensed in New York (250029) and active in the NPI registry since June 2007. She is enrolled in Medicare PECOS, is affiliated with North Shore University Hospital, and is a graduate of Other (2001).

NPPES Registry Identity

NPI1497950133
Entity TypeIndividualFemale
Primary Taxonomy207RN0300X
Provider Legal NameMERSEMA TESFAYE ABATECredential: MD
Location Address26 RESEARCH WAYEast Setauket, NY 11733-3526
Mailing Address26 Research WayEast Setauket, NY 11733-3526 · (631) 444-0580 · Fax (631) 444-0562
Phone(631) 444-0580
Fax(631) 444-0562
Sole ProprietorNo
Medical School CMSOtherGraduated 2001
Enumeration DateJune 20, 2007
Last NPPES UpdateJune 23, 2009
✔ NPI 1497950133 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · NephrologyAllopathic & Osteopathic Physicians
Taxonomy Code207RN0300X
License✔ Licensed in NY · 250029
Definition
An internist who treats disorders of the kidney, high blood pressure, fluid and mineral balance and dialysis of body wastes when the kidneys do not function. This specialist consults with surgeons about kidney transplantation.
26 RESEARCH WAY, East Setauket, NY 11733
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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

Mersema Tesfaye Abate 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.

PECOS PAC ID3577614015
PECOS Enrollment IDI20090624000138
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

3

Medicare enrollment records show Mersema Abate reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

North Shore-Lij Medical PC
34 mi
Urology
1010 NORTHERN BLVD STE 110
Great Neck, NY 11021
  • Reassigned Medicare billing, New York enrollment
  • 9,353 clinicians in this Medicare group
NPI 1053688572 (516) 321-7400
Claxton Medical PC
288 mi
Family Medicine
921 STATE ST
Ogdensburg, NY 13669
  • Reassigned Medicare billing, New York enrollment
  • 58 clinicians in this Medicare group
NPI 1013399617 (315) 393-1856
Claxton-Hepburn Medical Center
289 mi
Psychiatric Hospital
214 KING ST STE B
Ogdensburg, NY 13669
  • Reassigned Medicare billing, New York enrollment
  • 129 clinicians in this Medicare group
NPI 1891753034 (315) 393-3600

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 4

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.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 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.
150 services72 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 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.
145 services56 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.
112 services33 patients
Initial hospital care with moderate level of medical decision making, if using time, at least 75 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.
48 services45 patients

Hospital Affiliations CMS Care Compare

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

North Shore University Hospital

Acute Care Hospitals · Manhasset, NY
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number330106
Location300 Community DriveManhasset, NY 11030 · Nassau County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 11733 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
$154.28 typical visit price
range $67.40 – $203.53
Typical copayment $38.57 (range $16.85 – $50.88)
Most-billed visit code 99204
Established Patient
$117.62 typical visit price
range $21.66 – $164.45
Typical copayment $29.40 (range $5.41 – $41.11)
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.

Referred Medical Equipment & Supplies CMS DME claims 5

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Tacrolimus, extended release, (envarsus xr), oral, 0.25 mg J7503
Treatment-Chemotherapy · category RH002N
1 supplier60 claims20,160 services$1.21 avg. paid by Medicare
Prednisone, immediate release or delayed release, oral, 1 mg J7512
Treatment-Treatment - Miscellaneous · category RX029N
1 supplier27 claims4,110 services$0.01 avg. paid by Medicare
Mycophenolate mofetil, oral, 250 mg J7517
Treatment-Treatment - Miscellaneous · category RX029N
1 supplier32 claims4,620 services$0.19 avg. paid by Medicare
Pharmacy supply fee for oral anti-cancer, oral anti-emetic or immunosuppressive drug(s); for the first prescription in a 30-day period Q0511
Treatment-Chemotherapy · category RH012N
1 supplier34 claims34 services$18.96 avg. paid by Medicare
Pharmacy supply fee for oral anti-cancer, oral anti-emetic or immunosuppressive drug(s); for a subsequent prescription in a 30-day period Q0512
Treatment-Chemotherapy · category RH012N
1 supplier91 claims91 services$12.62 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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.

MS. HAKSOO KIM NURSE PRACTITIONER
Nurse Practitioner (Adult Health)
26 RESEARCH WAY
EAST SETAUKET, NY 11733
Suffolk County (631) 444-0502
MS. JENNIFER M MULVEY FITZGERALD NP, CDE
Nurse Practitioner (Family)
26 RESEARCH WAY, SUITE 1
EAST SETAUKET, NY 11733
Suffolk County (914) 649-9993
DR. LEONARD ARBEIT M.D.
Internal Medicine (Nephrology)
26 RESEARCH WAY
EAST SETAUKET, NY 11733
Suffolk County (631) 444-0580
DR. EDWARD NORD M.D.
Internal Medicine (Nephrology)
26 RESEARCH WAY
EAST SETAUKET, NY 11733
Suffolk County (631) 444-0580
DR. RAJEEV BALWANT PATEL M.D.
Internal Medicine (Pulmonary Disease)
26 RESEARCH WAY
EAST SETAUKET, NY 11733
Suffolk County (631) 444-9953
DR. HAROLD CARLSON M.D.
Internal Medicine (Endocrinology, Diabetes & Metabolism)
26 RESEARCH WAY
EAST SETAUKET, NY 11733
Suffolk County (631) 444-0580
DR. MOHAMED MOHSEN MANSOUR M.D.
Internal Medicine (Pulmonary Disease)
26 RESEARCH WAY
EAST SETAUKET, NY 11733
Suffolk County (631) 444-1750
MRS. FATIMA SHEIKH D.O
Internal Medicine (Nephrology)
26 RESEARCH WAY
EAST SETAUKET, NY 11733
Suffolk County (631) 444-0580

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 Mersema Abate's NPI number?

The NPI number for Mersema Abate is 1497950133. It was assigned to this individual provider in the NPPES registry on June 20, 2007.

Where is Mersema Abate located?

Mersema Abate practices at 26 Research Way, East Setauket, NY 11733. The listed phone number is (631) 444-0580.

What is Mersema Abate's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.

Is Mersema Abate enrolled in Medicare?

Yes. Mersema Abate 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 Mersema Abate's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mersema Abate reassigns Medicare benefits to 3 organizations: North Shore-Lij Medical PC (Great Neck, NY), Claxton Medical PC (Ogdensburg, NY) and Claxton-Hepburn Medical Center (Ogdensburg, NY). 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 Mersema Abate's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Mersema Abate affiliated with any hospitals?

According to CMS data, Mersema Abate is affiliated with North Shore University Hospital.

When was this NPI record last updated?

The NPPES record for Mersema Abate was last updated on June 23, 2009. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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.