Doctor profile · Federal record
Dr. Jack Greenwood, MD
Neurology With Special Qualifications in Child Neurology Physician (CMS: Neurology) · Port Jefferson, NY
- NPI 1851396865
- Accepts Medicare
- 52 yrs in practice
- Male
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
120 N Country RD
Port Jefferson, NY 117772604
(631) 474-0444
fax (631) 928-8605
Credentials & registration
- NPI registered
- June 2005 — 21 yrs on file
- Profile last updated
- April 2, 2008
- Year of graduation
- 1974 — 52 yrs since
- Specialty taxonomy
- 2084N0402X — NUCC code
- State license (1)
- New York #124686
- Medicaid
- NY #00664526
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1851396865. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
329
Distinct HCPCS
8
Medicare allowed
$32,352
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 102 | 56 | $149 | |
92537 |
Test to assess balance during warm and cool irrigation in both ears | 37 | 37 | $34 | |
92540 |
Evaluation and testing for balance with recording | 37 | 37 | $86 | |
92546 |
Test for abnormal eye movement using a rotating chair | 37 | 37 | $17 | |
92548 |
Test for balance and posture | 37 | 37 | $37 | |
99205 |
New patient office or other outpatient visit, 60-74 minutes | 34 | 34 | $246 | |
95923 |
Testing of autonomic (sympathetic) nervous system function | 33 | 29 | $50 | |
95816 |
Measurement of brain wave activity (eeg), awake and drowsy | 12 | 12 | $63 |
In context: peer comparison
Among 1 peers in this city , average services per provider: 41. This provider delivers 8.0× the peer median.Open Payments
Industry payments received
All-time total
$30
Transactions
1
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| ABBVIE INC. | 1 | $29.69 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
296
Patients
15
Total drug cost
$119,613
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Donepezil Hcl | Generic | 77 | 15 | $521 |
| Topiramate | Generic | 38 | 0 | $288 |
| Gabapentin | Generic | 33 | 0 | $613 |
| Lacosamide | Generic | 31 | 0 | $3,452 |
| Carbidopa-Levodopa (Carbidopa/Levodopa) | Brand | 22 | 0 | $271 |
| Dilantin (Phenytoin Sodium Extended) | Brand | 16 | 0 | $8,341 |
| Levetiracetam | Generic | 15 | 0 | $777 |
| Rizatriptan (Rizatriptan Benzoate) | Brand | 14 | 0 | $766 |
| Avonex Pen (Interferon Beta-1a) | Brand | 13 | 0 | $92,983 |
| Tegretol (Carbamazepine) | Brand | 13 | 0 | $10,806 |
Frequently asked questions
What is Dr. Jack Greenwood's medical specialty?
Dr. Jack Greenwood practices Neurology With Special Qualifications in Child Neurology Physician in Port Jefferson, NY.
Where does Dr. Jack Greenwood practice?
Dr. Jack Greenwood practices at 120 N Country RD, Port Jefferson, NY 117772604. Office phone: 6314740444.
What is Dr. Jack Greenwood's NPI?
Dr. Jack Greenwood's National Provider Identifier (NPI) is 1851396865, issued by NPPES.
Does Dr. Jack Greenwood accept Medicare assignment?
Yes. Dr. Jack Greenwood accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Jack Greenwood commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Test to assess balance during warm and cool irrigation in both ears (HCPCS 92537); Evaluation and testing for balance with recording (HCPCS 92540). Source: CMS Medicare Physician & Other Practitioners file.