Physician Profile
Greggory Gahn, MD
Unclaimed ProfileAbout 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.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it — free, and no identity document with a practice or institutional email.
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
- (520) 881-1400
- Email not available
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
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
Inflammation, neurologic, and orbit
Retina & vitreous
Procedures & services
Most searched procedures
Examination and imaging
Cataract and lens
Corneal procedures
Eye diagnostics
Eye injuries
Eyelid surgery
Eyelid, tear duct, and muscle
Glaucoma
- Glaucoma drainage-device implantation
- Laser peripheral iridotomy
- Minimally invasive glaucoma surgery
- Selective laser trabeculoplasty
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 3
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. Guide.md cannot book appointments or pass on messages — please call the office directly.
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
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.