JASON L GREENBAUM (MD) – Emergency Medicine Physician, NPI 1649205493
Emergency Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
839 EMERGENCY MEDICINE in CT
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Provider Addresses for JASON L GREENBAUM (MD)
27, Sussex Place, Belltown, Stamford, Western Connecticut Planning Region, Connecticut, 06905, United States
STAMFORD, CT 069052931
Phone: (646) 242-3799
Type: Mailing
30, Shelburne Road, Stamford, Fairfield County, Connecticut, 06902, United States
STAMFORD, CT 069023628
Phone: (330) 493-4443
Fax: (330) 493-8677
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 1 Open Payments records for all available years, with a total value of $17.
Total Amount is formed as General ($17) + Research ($0) + Ownership ($0) = $17.
Last reported payment date: 2024-04-30 • Largest payer in this snapshot: Janssen Pharmaceuticals, Inc ($17).
Total Amount
$17
General + Research + Ownership
Payments
1
Total payment records
General Amount
$17
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-04-30
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Janssen Pharmaceuticals, Inc | $17 |
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: 2022-08-15
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 4 Medicare enrollment records; no due dates published yet.
Enrollment records
4
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 |
|---|---|---|---|---|
| I20061019000026 | I | Emergency Medicine | CT | TBD |
| I20101018000809 | I | Emergency Medicine | NY | TBD |
| I20200401000935 | I | Emergency Medicine | IN | TBD |
| I20220815002214 | I | Emergency Medicine | MA | 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 |
|---|---|---|---|---|
| 99284 | Emergency department visit with moderate level of medical decision making | 71 | 69 | $0 |
| 99285 | Emergency department visit with high level of medical decision making | 62 | 61 | $0 |
| 93010 | Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | 18 | 18 | $0 |
| 99291 | Critical care, first 30-74 minutes | 17 | 17 | $0 |
| 99283 | Emergency department visit with low level of medical decision making | 12 | 12 | $0 |
Insurance plans in this area (ZIP 06905)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Emergency Medicine | MA | |
| Family Practice, Hospitalist | MA | |
| Certified Registered Nurse Anesthetist (Crna) | CT | |
| A N E S T H E S I O L O G Y | MA | |
| Certified Registered Nurse Anesthetist (Crna) | MA | |
| - | IL | |
| Emergency Medicine | MA | |
| - | MA | |
| Diagnostic Radiology | NH | |
| Certified Registered Nurse Anesthetist (Crna) | MA |
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