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Edit this profileAt a glance
- 3172 N Swan Rd, Tucson, AZ 85712
About Dr. Gahn
Greggory Gahn, MD is an ophthalmology — retina specialist based in Tucson, AZ. Greggory is a 2019 graduate of University of Nevada School of Medicine. According to Medicare claims data, the services billed most often include removal of membrane of retina with removal of internal limiting membrane of retina. The provider's National Provider Identifier (NPI) is 1720541147.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
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
- (520) 881-1400
- Email not available
Is this your home address or personal number? Hide it
Practice Locations
3172 N SWAN RD
Tucson, AZ 85712
Conditions Commonly Evaluated or Treated
Within Ophthalmology 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
Eye injury and cancer
Inflammation, neurologic, and orbit
Most searched conditions
Cornea and external eye
Eyelid and tear drainage
Refractive and focusing
- Astigmatism
- Eye misalignment (strabismus)
- Farsightedness
- Lazy eye (amblyopia)
- Nearsightedness
- Presbyopia
Retina and vitreous
Eye injuries
Retina & vitreous
Procedures & services
Cataract and lens
- Cataract surgery with lens implant
- Laser-assisted cataract surgery
- Intraocular lens exchange
- YAG laser capsulotomy
Cornea and refractive
Emergency and minor
- Corneal rust-ring removal
- Removal of an eye foreign body
- Repair of an eye or eyelid laceration
- Repair of ruptured globe
Examination and imaging
- Eye ultrasound
- Slit-lamp examination
- Visual-field testing
- Corneal topography
- Fluorescein angiography
Eyelid, tear duct, and muscle
- Chalazion removal
- Ectropion repair
- Eyelid surgery
- Tear-duct probing
- Drooping-eyelid repair
- Entropion repair
- Eye-muscle surgery
- Tear-duct bypass surgery
Glaucoma
- Cyclophotocoagulation
- Trabeculectomy
- Glaucoma drainage-device implantation
- Laser peripheral iridotomy
- Minimally invasive glaucoma surgery
- Selective laser trabeculoplasty
Retina
Most searched procedures
Corneal procedures
Eye diagnostics
Eye injuries
Eyelid surgery
Laser eye surgery
Laser procedures
Laser vision correction
Refractive surgery
Tear duct & Orbit
Procedures Most Often Billed to Medicare
17 services · 16 patients · 1 distinct code
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Removal of membrane of retina with removal of internal limiting membrane of retina | Procedure | 67042 |
17 | As often as other peers in Ophthalmology — Retina Specialist |
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.
Related specialists at this location 4
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.
Other eye doctors in Tucson 8
Same specialty, same city.
More connections — 17 related providers in 3 groups
Trained at University of Nevada School of Medicine 1
Other providers in the same specialty who trained at the same institution.
Class of 2019 at University of Nevada School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Removal of membrane of retina with removal of internal limiting membrane of retina 8
Providers in AZ who bill this service to Medicare most often.
Common questions
What kind of doctor is Dr. Gahn?
Dr. Gahn is an eye doctor in Tucson, AZ. That is the designation recorded for this NPI in the federal registry, where it is listed as “Ophthalmology — Retina Specialist”.
NPI registry
What is Dr. Gahn's address?
Dr. Gahn is listed at 3172 N Swan Rd, Tucson, AZ 85712. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Dr. Gahn?
The number on file is (520) 881-1400. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Dr. Gahn?
Dr. Gahn's National Provider Identifier is 1720541147. 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
Where did Dr. Gahn train?
Dr. Gahn attended University of Nevada School of Medicine, graduating in 2019. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Gahn have?
Dr. Gahn has 7 years experience. Calculated from a graduation year of 2019, reported in the CMS National Downloadable File.
CMS public data
What procedures does Dr. Gahn perform?
According to Medicare billing data, Dr. Gahn performs procedures including removal of membrane of retina with removal of internal limiting membrane of retina. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Gahn's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Gahn. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.