Physician Profile
Gregory C. Zwack, MD
Unclaimed ProfileAbout Dr. Zwack
Based in Wilmington, NC, Gregory C. Zwack, MD is listed in the NPI registry under otolaryngology (ent). Gregory graduated from Jefferson Medical College of Thomas Jefferson University in 1992. According to Medicare claims data, Gregory cared for 1,056 Medicare patients across 1,205 services. The services billed most often include established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more, new patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more, and new patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (910) 341-3300
- Email not available
Practice Locations
6727 PARKER FARM DRIVE
Wilmington, NC 28405
Conditions Commonly Evaluated or Treated
Within Otolaryngology generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
- Ear infection
- Sinus infection
- Sleep apnea
- Tinnitus
- Tonsillitis
- Vertigo
Balance
- Ménière's disease
Ear and hearing
- Cholesteatoma
- Eustachian tube dysfunction
- Hearing loss
- Otosclerosis
- Perforated eardrum
- Swimmer's ear
Head, neck, and salivary
- Hyperparathyroidism
- Neck mass
- Parotid gland tumor
- Salivary gland infection
- Thyroid cancer
Nose and sinus
- Broken nose
- Deviated septum
- Loss or reduction of smell
- Nasal obstruction
- Nasal polyps
- Nosebleeds
- Seasonal allergies
Sleep and airway
- Snoring
Throat and voice
- Enlarged adenoids
- Globus sensation
- Hoarseness and voice change
- Laryngopharyngeal reflux
- Swallowing difficulties
- Vocal cord nodules
- Vocal cord paralysis
Cancer
- Laryngeal cancer
- Oral cavity cancer
- Skin cancer of the head and neck
Head & Neck
- Thyroid nodules
Throat & Voice
- Frequent Strep Throat
Procedures & services
Most searched procedures
- Adenoidectomy
- Ear tube surgery
- Hearing test
- Sinus surgery
- Tonsillectomy
Office diagnosis
- Fine-needle aspiration of a neck mass
- Flexible laryngoscopy
- Nasal endoscopy
Cosmetic
- Earlobe Repair
Ear & Hearing
- Bone-Anchored Hearing Aid Surgery
- Eustachian Tube Balloon Dilation
Ear procedures
- Cochlear implant surgery
- Eardrum repair
- Earwax removal
- Mastoid surgery
- Stapes surgery
Head & Neck
- Neck Lump Removal
- Salivary Duct Stone Removal
- Thyroid Nodule Biopsy
Head and neck surgery
- Neck lymph-node dissection
- Parathyroid surgery
- Parotid gland surgery
- Thyroid removal surgery
- Voice-box removal
Nose & Sinus
- Broken Nose Repair
Nose and sinus procedures
- Nasal cautery for nosebleeds
- Nasal-polyp removal
- Rhinoplasty
- Septoplasty
- Turbinate reduction
Sleep and airway
- Drug-induced sleep endoscopy
- Hypoglossal nerve stimulator implantation
- Uvulopalatopharyngoplasty
Throat & Voice
- Tongue-Tie Release
Throat, voice, and swallowing
- Esophageal dilation
- Microlaryngoscopy
- Vocal-fold injection
Procedures Most Often Billed to Medicare
1,205 services · 1,056 patients · 14 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Removal of impacted ear wax | Procedure | 69210 |
157 |
| Diagnostic exam of nasal passages using an endoscope | Procedure | 31231 |
82 |
| Diagnostic exam of voice box using a flexible endoscope | Procedure | 31575 |
73 |
| Insertion of needle into vein for collection of blood sample | Procedure | 36415 |
18 |
| Exam of the nose and throat using an endoscope | Treatment | 92511 |
61 |
| Repositioning exercises of head for treatment of dizziness, each day | Treatment | 95992 |
12 |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
264 |
| New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more | Office visit | 99203 |
166 |
| New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more | Office visit | 99204 |
161 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
147 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other otolaryngology specialists at this location 1
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 2
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 30 related providers in 4 groups
Other otolaryngology specialists in Wilmington 7
Same specialty, same city.
Trained at Jefferson Medical College of Thomas Jefferson University 8
Other providers in the same specialty who trained at the same institution.
Class of 1992 at Jefferson Medical College of Thomas Jefferson University 8
Providers who graduated from the same medical school in the same year.
Also performs Removal of impacted ear wax 7
Providers in NC who bill this service to Medicare most often.
Common questions
What is Dr. Zwack's specialty?
Dr. Zwack is an otolaryngology (ent) in Wilmington, NC. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where can I find Dr. Zwack?
Dr. Zwack is listed at 6727 Parker Farm Drive, Wilmington, NC 28405. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Dr. Zwack?
The number on file is (910) 341-3300. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Zwack's NPI number?
Dr. Zwack's National Provider Identifier is 1104857358. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
What is Dr. Zwack's medical education?
Dr. Zwack attended Jefferson Medical College of Thomas Jefferson University, graduating in 1992. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Zwack been practicing?
Dr. Zwack has 34 years experience. Calculated from a graduation year of 1992, reported in the CMS National Downloadable File.
CMS public data
What is Dr. Zwack known for?
According to Medicare billing data, Dr. Zwack performs procedures including removal of impacted ear wax, diagnostic exam of nasal passages using an endoscope and diagnostic exam of voice box using a flexible endoscope; provides treatments such as exam of the nose and throat using an endoscope and repositioning exercises of head for treatment of dizziness, each day, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Zwack confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Zwack. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.