Physician Profile
Unclaimed ProfileAbout KOSTER
James J Koster, MD is a healthcare provider in Phoenix, AZ specialising in ophthalmology. James trained at University of Arizona College of Medicine, graduating in 1999.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Common questions
What kind of doctor is Dr. Koster?
Dr. Koster is an ophthalmology in Phoenix, AZ. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “OPHTHALMOLOGY”.
NPI registry
What is Dr. Koster's address?
Dr. Koster is listed at 300 E OSBORN RD STE 100, Phoenix, AZ 85012. 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. Koster?
The number on file is (480) 994-5012. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Koster's NPI number?
Dr. Koster's National Provider Identifier is 1851387344. 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. Koster train?
Dr. Koster attended University of Arizona College of Medicine, graduating in 1999. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Koster been practising?
Dr. Koster has 27 years experience. Calculated from a graduation year of 1999, reported in the CMS National Downloadable File.
CMS public data
What procedures does Dr. Koster perform?
According to Medicare billing data, Dr. Koster performs procedures including removal of cataract with insertion of prosthetic lens and removal of recurring cataract in lens capsule using a laser; 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. Koster confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Koster. If this is you, claiming it is free.
Guide.md
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (480) 994-5012
- Email not available
Practice Locations
300 E OSBORN RD STE 100
Phoenix, AZ 85012
Procedures Most Often Billed to Medicare
3,158 services · 2,535 patients · 14 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Removal of cataract with insertion of prosthetic lens | Procedure | 66984 |
277 |
| Removal of recurring cataract in lens capsule using a laser | Procedure | 66821 |
113 |
| Ultrasound scan of cornea to determine thickness | Imaging | 76514 |
27 |
| Established patient complete exam of visual system | Treatment | 92014 |
1,122 |
| Measurement of corneal curvature and depth of eye | Treatment | 92136 |
451 |
| Exam of visual field with extended testing | Treatment | 92083 |
181 |
| Imaging of optic nerve | Treatment | 92133 |
159 |
| Photography of the retina | Treatment | 92250 |
152 |
| Imaging of retina | Treatment | 92134 |
139 |
| New patient complete exam of visual system | Treatment | 92004 |
116 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
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Claim this profileRelated providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other ophthalmology specialists at this location 4
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 1
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.
More connections — 32 related providers in 4 groups
Other ophthalmology specialists in Phoenix 8
Same specialty, same city.
Trained at University of Arizona College of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 1999 at University of Arizona College of Medicine 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 AZ who bill this service to Medicare most often.
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.