Physician Profile
Charles E. Ahrens, M.D.
Unclaimed ProfileAbout 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.
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
- (218) 249-4600
- Email not available
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
Most searched conditions
- Cataracts
- Diabetic retinopathy
- Dry eye
- Glaucoma
- Macular degeneration
Cornea and external eye
- Blepharitis
- Corneal abrasion
- Corneal ulcer
- Keratoconus
- Pink eye
- Pterygium
Eyelid and tear drainage
- Blocked tear duct
- Chalazion
- Drooping eyelid
Refractive and focusing
- Astigmatism
- Eye misalignment (strabismus)
- Farsightedness
- Lazy eye (amblyopia)
- Nearsightedness
- Presbyopia
Retina and vitreous
- Epiretinal membrane
- Retinal detachment
Eye injuries
- Foreign Object in Eye
Inflammation, neurologic, and orbit
- Thyroid eye disease
- Uveitis
Retina & vitreous
- Eye Floaters and Flashes
Procedures & services
Most searched procedures
- Cataract surgery
- Eye exam
- LASIK
- Retina surgery
Examination and imaging
- Corneal topography
- Fluorescein angiography
Cataract and lens
- Intraocular lens exchange
- YAG laser capsulotomy
Corneal procedures
- Amniotic Membrane Eye Graft
Eye diagnostics
- Optical Coherence Tomography Scan
Eye injuries
- Eye Scratch Laceration Repair
- Foreign Object Removal from Eye
Eyelid surgery
- Stye Removal
Eyelid, tear duct, and muscle
- Drooping-eyelid repair
- Entropion repair
- Eye-muscle surgery
- Eyelid surgery
- Tear-duct bypass surgery
Glaucoma
- Glaucoma drainage-device implantation
- Laser peripheral iridotomy
- Minimally invasive glaucoma surgery
- Selective laser trabeculoplasty
Laser eye surgery
- Laser Floater Removal
Laser procedures
- Laser Treatment for Retinal Tear
Laser vision correction
- SMILE Eye Surgery
Refractive surgery
- Clear Lens Exchange
- Implantable Contact Lenses
Tear duct & Orbit
- Orbital Decompression Surgery
- Tear Duct Plugs
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. Guide.md cannot book appointments or pass on messages — please call the office directly.
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.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.