Doctor profile · Federal record
Dr. Gregory Zwack, MD
Otolaryngology Physician (CMS: Otolaryngology) · Wilmington, NC
- NPI 1104857358
- Accepts Medicare
- 34 yrs in practice
- Male
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
6727 Parker Farm Drive
Wilmington, NC 28405
(910) 341-3300
fax (910) 251-2067 - Mailing address
-
1202 Medical Center Dr
Wilmington, NC 284017307
Credentials & registration
- NPI registered
- July 2006 — 20 yrs on file
- Profile last updated
- January 31, 2019
- Year of graduation
- 1992 — 34 yrs since
- Specialty taxonomy
- 207Y00000X — NUCC code
- State license (1)
- North Carolina #2009-01440
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1104857358. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
1,294
Distinct HCPCS
10
Medicare allowed
$141,302
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 253 | 203 | $86 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 223 | 223 | $156 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 172 | 136 | $121 | |
69210 |
Removal of impacted ear wax | 164 | 131 | $45 | |
99203 |
New patient office or other outpatient visit, 30-44 minutes | 158 | 158 | $104 | |
31231 |
Diagnostic exam of nasal passages using an endoscope | 83 | 77 | $178 | |
31575 |
Diagnostic exam of voice box using a flexible endoscope | 68 | 55 | $122 | |
92511 |
Exam of the nose and throat using an endoscope | 64 | 52 | $111 | |
G0268 |
Removal of impacted cerumen (one or both ears) by physician on same date of service as audiologic function testing | 20 | 20 | $50 | |
36415 |
Insertion of needle into vein for collection of blood sample | 17 | 16 | $8 |
In context: peer comparison
Among 7 peers in this city , average services per provider: 184. This provider delivers 7.0× the peer median.Open Payments
Industry payments received
All-time total
$571
Transactions
19
Manufacturers
6
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| GlaxoSmithKline, LLC. | 9 | $250.20 | |
| GENZYME CORPORATION | 5 | $163.97 | |
| Regeneron Healthcare Solutions, Inc. | 2 | $67.15 | |
| Smith+Nephew, Inc. | 1 | $50.00 | |
| Phathom Pharmaceuticals, Inc. | 1 | $20.44 | |
| AERIN MEDICAL INC. | 1 | $19.36 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
298
Patients
134
Total drug cost
$53,886
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Ipratropium Bromide | Generic | 63 | 24 | $1,958 |
| Montelukast Sodium | Generic | 59 | 23 | $846 |
| Prednisone | Generic | 43 | 38 | $246 |
| Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) | Brand | 22 | 21 | $194 |
| Ciprofloxacin-Dexamethasone (Ciprofloxacin Hcl/Dexameth) | Brand | 19 | 13 | $2,951 |
| Cefdinir | Generic | 17 | 15 | $437 |
| Fluticasone Propionate | Generic | 16 | 0 | $150 |
| Esomeprazole Magnesium | Generic | 13 | 0 | $226 |
| Dupixent Pen (Dupilumab) | Brand | 12 | 0 | $46,499 |
| Triamterene-Hydrochlorothiazid (Triamterene/Hydrochlorothiazid) | Brand | 12 | 0 | $128 |
Hospital affiliations
Frequently asked questions
What is Dr. Gregory Zwack's medical specialty?
Dr. Gregory Zwack practices Otolaryngology Physician in Wilmington, NC.
Where does Dr. Gregory Zwack practice?
Dr. Gregory Zwack practices at 6727 Parker Farm Drive, Wilmington, NC 28405. Office phone: 9103413300.
What is Dr. Gregory Zwack's NPI?
Dr. Gregory Zwack's National Provider Identifier (NPI) is 1104857358, issued by NPPES.
Does Dr. Gregory Zwack accept Medicare assignment?
Yes. Dr. Gregory Zwack accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Gregory Zwack commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99213); New patient office or other outpatient visit (HCPCS 99204); Established patient office or other outpatient visit (HCPCS 99214). Source: CMS Medicare Physician & Other Practitioners file.