MRS. ALEXANDRA GREENBERG (D.O.) – Gastroenterology Physician, NPI 1063852101
Gastroenterology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
143 GASTROENTEROLOGY in NV
Provider Addresses for MRS. ALEXANDRA GREENBERG (D.O.)
620 SHADOW LANE
LAS VEGAS, NV 89106
Phone: (702) 388-8436
Fax: (702) 388-8431
Type: Mailing
1 Riverview Plz
Red Bank, NJ 077011864
Phone: (732) 741-2700
Fax: (732) 398-6405
Type: Location
525 JACK MARTIN BLVD STE 301
BRICK, NJ 087247737
Phone: (732) 840-0067
Fax: (732) 840-3103
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 195 Open Payments records for all available years, with a total value of $3,839.
Total Amount is formed as General ($3,839) + Research ($0) + Ownership ($0) = $3,839.
Last reported payment date: 2024-12-19 • Largest payer in this snapshot: ABBVIE INC. ($885).
Total Amount
$3,839
General + Research + Ownership
Payments
195
Total payment records
General Amount
$3,839
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-19
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| ABBVIE INC. | $885 |
| Janssen Biotech, Inc. | $624 |
| GENZYME CORPORATION | $286 |
| PFIZER INC. | $195 |
| Phathom Pharmaceuticals, Inc. | $189 |
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2016-11-07
PECOS data refreshed: 2026-06-15
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20161107000195 | I | Gastroenterology | NJ | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 572 | 371 | $0 |
| 99222 | Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 237 | 232 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 222 | 170 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 217 | 169 | $0 |
| 43239 | Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 116 | 112 | $0 |
Insurance plans in this area (ZIP 89106)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Gastroenterology, Internal Medicine | NJ | |
| G A S T R O E N T E R O L O G Y | NY | |
| Gastroenterology, Internal Medicine | NJ | |
| A N E S T H E S I O L O G Y | IA | |
| A N E S T H E S I O L O G Y | NJ | |
| - | NJ | |
| Gastroenterology, Internal Medicine | NJ | |
| Gastroenterology, Internal Medicine | NJ | |
| Gastroenterology, Internal Medicine | NJ | |
| Nurse Practitioner | NJ |
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