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Edit this profileAt a glance
- 4190 Loberg Ave, Duluth, MN 55811
About Dr. Ahrens
Based in Duluth, MN, Charles E. Ahrens, M.D. is listed in the NPI registry under ophthalmology. Charles graduated from Sanford School of Medicine of University of South Dakota in 2007. Medicare claims data shows Charles provided 1,652 services to 930 patients. The services billed most often include imaging of retina, established patient complete exam of visual system, and injection of drug into eye. NPI 1356540827 identifies this record in the national registry.
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
- (218) 249-4600
- Email not available
Is this your home address or personal number? Hide it
Practice Locations
4190 LOBERG AVE
Duluth, MN 55811
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
1,652 services · 930 patients · 14 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Injection of drug into eye | Procedure | 67028 |
255 | As often as other peers in Ophthalmology |
| Removal of cataract with insertion of prosthetic lens | Procedure | 66984 |
103 | As often as other peers in Ophthalmology |
| Removal of recurring cataract in lens capsule using a laser | Procedure | 66821 |
21 | Less often than most peers in Ophthalmology |
| Imaging of retina | Treatment | 92134 |
359 | More often than most peers in Ophthalmology |
| Established patient complete exam of visual system | Treatment | 92014 |
270 | As often as other peers in Ophthalmology |
| Measurement of corneal curvature and depth of eye | Treatment | 92136 |
113 | As often as other peers in Ophthalmology |
| Exam of visual field with extended testing | Treatment | 92083 |
47 | Less often than most peers in Ophthalmology |
| Imaging of optic nerve | Treatment | 92133 |
36 | Less often than most peers in Ophthalmology |
| New patient complete exam of visual system | Treatment | 92004 |
26 | Less often than most peers in Ophthalmology |
| Ct scan of cornea | Treatment | 92025 |
11 | Less often than most peers in Ophthalmology |
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.
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 Duluth 8
Same specialty, same city.
Trained at Sanford School of Medicine of University of South Dakota 8
Other providers in the same specialty who trained at the same institution.
More connections — 16 related providers in 2 groups
Class of 2007 at Sanford School of Medicine of University of South Dakota 8
Providers who graduated from the same medical school in the same year.
Also performs Injection of drug into eye 8
Providers in MN who bill this service to Medicare most often.
Common questions
What kind of doctor is Charles E. Ahrens?
Charles E. Ahrens is an eye doctor in Duluth, MN. That is the designation recorded for this NPI in the federal registry, where it is listed as “Ophthalmology”.
NPI registry
What is Charles E. Ahrens's address?
Charles E. Ahrens is listed at 4190 Loberg Ave, Duluth, MN 55811. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Charles E. Ahrens?
The number on file is (218) 249-4600. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Charles E. Ahrens?
Charles E. Ahrens's National Provider Identifier is 1356540827. 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 Charles E. Ahrens train?
Charles E. Ahrens attended Sanford School of Medicine of University of South Dakota, graduating in 2007. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Charles E. Ahrens have?
Charles E. Ahrens has 19 years experience. Calculated from a graduation year of 2007, reported in the CMS National Downloadable File.
CMS public data
What procedures does Charles E. Ahrens perform?
According to Medicare billing data, Charles E. Ahrens performs procedures including injection of drug into eye, removal of cataract with insertion of prosthetic lens and removal of recurring cataract in lens capsule using a laser; provides treatments such as imaging of retina and established patient complete exam of visual system, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Charles E. Ahrens's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Charles E. Ahrens. If this is you, claiming it is free.
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