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Edit this profileAt a glance
- 4600 W Loomis Rd Ste 310, Greenfield, WI 53220
About Dr. Larson
Based in Greenfield, WI, Mark D. Larson, MD is listed in the NPI registry under ophthalmology. Mark graduated from Sanford School of Medicine of University of South Dakota in 2019. Mark is also listed as specializing in ophthalmology — glaucoma. According to Medicare claims data, Mark cared for 341 Medicare patients across 371 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, established patient complete exam of visual system, and measurement of corneal curvature and depth of eye. NPI 1831651868 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
- (414) 281-0424
- Email not available
Practice Locations
4600 W LOOMIS RD STE 310
Greenfield, WI 53220
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
371 services · 341 patients · 12 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Removal of cataract with insertion of prosthetic lens | Procedure | 66984 |
19 | Less often than most peers in Ophthalmology |
| Ultrasound scan of cornea to determine thickness | Imaging | 76514 |
23 | Less often than most peers in Ophthalmology |
| Established patient complete exam of visual system | Treatment | 92014 |
39 | Less often than most peers in Ophthalmology |
| Measurement of corneal curvature and depth of eye | Treatment | 92136 |
38 | Less often than most peers in Ophthalmology |
| Exam of visual field with extended testing | Treatment | 92083 |
31 | Less often than most peers in Ophthalmology |
| Imaging of optic nerve | Treatment | 92133 |
27 | Less often than most peers in Ophthalmology |
| Exam of the internal drainage system of eye | Treatment | 92020 |
26 | Less often than most peers in Ophthalmology |
| Imaging of retina | Treatment | 92134 |
22 | Less often than most peers in Ophthalmology |
| New patient complete exam of visual system | Treatment | 92004 |
21 | Less often than most peers in Ophthalmology |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
61 | 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.
Related specialists at this location 5
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 Greenfield 8
Same specialty, same city.
More connections — 24 related providers in 3 groups
Trained at Sanford School of Medicine of University of South Dakota 8
Other providers in the same specialty who trained at the same institution.
Class of 2019 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 Removal of cataract with insertion of prosthetic lens 8
Providers in WI who bill this service to Medicare most often.
Common questions
What kind of doctor is Dr. Larson?
Dr. Larson is an eye doctor in Greenfield, WI. That is the designation recorded for this NPI in the federal registry, where it is listed as “Ophthalmology”.
NPI registry
What is Dr. Larson's address?
Dr. Larson is listed at 4600 W Loomis Rd Ste 310, Greenfield, WI 53220. 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. Larson?
The number on file is (414) 281-0424. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Dr. Larson's NPI number?
Dr. Larson's National Provider Identifier is 1831651868. 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. Larson train?
Dr. Larson attended Sanford School of Medicine of University of South Dakota, graduating in 2019. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Larson been practicing?
Dr. Larson 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. Larson perform?
According to Medicare billing data, Dr. Larson performs procedures including removal of cataract with insertion of prosthetic lens; reads or performs imaging such as ultrasound scan of cornea to determine thickness; provides treatments such as established patient complete exam of visual system and measurement of corneal curvature and depth of eye, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Larson confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Larson. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.