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DR. ALEXANDER JOHN GREENSTEIN M.D.
NPI 1992964035
Surgery in New York, NY

Active since June 04, 2008PECOS EnrolledAccepts Medicare Assignment
5 E 98TH ST, 15TH FLOOR, BOX 1259, NEW YORK, NY 10029(212) 241-8679(212) 534-2654 Get Directions Write a Review

NPPES record last updated: October 8, 2014. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Dr. Alexander John Greenstein M.d. NPPES

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

DR. ALEXANDER JOHN GREENSTEIN M.D. (NPI 1992964035) is an individual surgery provider in New York, New York, licensed in New York (60 233708) and active in the NPI registry since June 2008. He is enrolled in Medicare PECOS, is affiliated with Mount Sinai Hospital, and is a graduate of Js Weill Medical College, Cornell University (2003).

NPPES Registry Identity

NPI1992964035
Entity TypeIndividualMale
Primary Taxonomy208600000X
Provider Legal NameDR. ALEXANDER JOHN GREENSTEINCredential: M.D.
Location Address5 E 98TH ST, 15TH FLOOR, BOX 1259New York, NY 10029-6501
Mailing Address5 E 98th St, 15th Floor, Box 1259New York, NY 10029-6501 · (212) 241-8679 · Fax (212) 534-2654
Phone(212) 241-8679
Fax(212) 534-2654
Sole ProprietorNo
Medical School CMSJs Weill Medical College, Cornell UniversityGraduated 2003
Enumeration DateJune 4, 2008
Last NPPES UpdateOctober 8, 2014
✔ NPI 1992964035 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySurgeryAllopathic & Osteopathic Physicians
Taxonomy Code208600000X
License✔ Licensed in NY · 60 233708
Definition
A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.
5 E 98TH ST, New York, NY 10029
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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

Dr. Alexander John Greenstein 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 ID648321356
PECOS Enrollment IDI20100907001013
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 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 straightforward or low level of medical decision making, per day, if using time, at least 25 minutes 99231
Follow-up hospital inpatient care is a daily service where a healthcare professional checks on your health progress during your hospital stay. Each session typically lasts 15 minutes, involving updates on your condition and adjustments to your treatment plan, if necessary.
44 services19 patients
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204
This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.
43 services43 patients
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222
Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
23 services21 patients
Drainage of abdominal abscess or infection 49020
Drainage of an abdominal abscess or infection involves a procedure to remove pus that has collected in the abdomen due to an infection. This is typically done by inserting a thin tube through the skin into the abscess to drain the pus, helping to alleviate symptoms and promote healing.
13 services13 patients

Hospital Affiliations CMS Care Compare

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

Mount Sinai Hospital

Acute Care Hospitals · New York, NY
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number330024
LocationOne Gustave L Levy PlaceNew York, NY 10029 · New York County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 10029 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
$102.04 typical visit price
range $65.69 – $198.19
Typical copayment $25.51 (range $16.42 – $49.54)
Most-billed visit code 99203
Established Patient
$81.44 typical visit price
range $21.20 – $160.66
Typical copayment $20.36 (range $5.30 – $40.16)
Most-billed visit code 99213
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 20

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

Skin barrier; solid, 4 x 4 or equivalent; each A4362
DME-Orthotic Devices · category DF010N
9 suppliers63 claims2,010 services$3.21 avg. paid by Medicare
Ostomy belt, each A4367
DME-Orthotic Devices · category DF010N
5 suppliers14 claims38 services$6.79 avg. paid by Medicare
Ostomy skin barrier, liquid (spray, brush, etc.), per oz A4369
DME-Orthotic Devices · category DF010N
4 suppliers22 claims86 services$2.21 avg. paid by Medicare
Ostomy skin barrier, powder, per oz A4371
DME-Orthotic Devices · category DF010N
8 suppliers41 claims108 services$3.46 avg. paid by Medicare
Ostomy skin barrier, solid 4 x 4 or equivalent, extended wear, without built-in convexity, each A4385
DME-Orthotic Devices · category DF010N
10 suppliers91 claims3,140 services$4.91 avg. paid by Medicare
Ostomy pouch, drainable, with barrier attached, with built-in convexity (1 piece), each A4389
DME-Orthotic Devices · category DF010N
2 suppliers12 claims250 services$5.15 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.

REBECCA BARZI NP
Nurse Practitioner (Family)
5 E 98TH ST
NEW YORK, NY 10029
New York County (212) 241-0764
BELINDA YEW PHD
Psychologist (Clinical)
5 E 98TH ST
NEW YORK, NY 10029
New York County (929) 224-3803
JADEN BAYE-CIGNA PA-C
Physician Assistant
5 E 98TH ST
NEW YORK, NY 10029
New York County (212) 241-9728
SUPINDA BUNYAVANICH M.D.
Allergy & Immunology
5 E 98TH ST
NEW YORK, NY 10029
New York County (212) 241-5548
DR. SHELDON LICHTBLAU M.D.
Orthopaedic Surgery
5 E 98TH ST, BOX 1188
NEW YORK, NY 10029
New York County (212) 241-1645
DR. YOUSAF ALI MD
Internal Medicine (Rheumatology)
5 E 98TH ST
NEW YORK, NY 10029
New York County (212) 659-9210
MRS. LESLIE CARLSON SCHLACHTER PA
Physician Assistant
5 E 98TH ST, 6TH FLOOR UROLOGY
NEW YORK, NY 10029
New York County (212) 241-5629
ORTHOPEDICS 2 DEPARTMENT OF MOUNT SINAI
Specialist
5 E 98TH ST
NEW YORK, NY 10029
New York County (212) 241-8892

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 Alexander Greenstein's NPI number?

The NPI number for Alexander Greenstein is 1992964035. It was assigned to this individual provider in the NPPES registry on June 4, 2008.

Where is Alexander Greenstein located?

Alexander Greenstein practices at 5 E 98th St 15th Floor, Box 1259, New York, NY 10029. The listed phone number is (212) 241-8679.

What is Alexander Greenstein's specialty?

The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.

Is Alexander Greenstein enrolled in Medicare?

Yes. Alexander Greenstein 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.

Is Alexander Greenstein affiliated with any hospitals?

According to CMS data, Alexander Greenstein is affiliated with Mount Sinai Hospital.

When was this NPI record last updated?

The NPPES record for Alexander Greenstein was last updated on October 8, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.