What is James Koster's specialty?

James Koster (NPI 1851387344) is a Medicare-billing provider whose primary specialty is Ophthalmology in Phoenix, AZ.

Where does James Koster practice?

James Koster practices in Phoenix, AZ, based on the location reported in the CMS Medicare provider datasets for NPI 1851387344.

How much does Medicare pay James Koster?

James Koster (NPI 1851387344) received approximately $329K in total Medicare Part B payments, serving 1,281 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1851387344

James KosterMD

OphthalmologyPhoenix, AZI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

2,535

Unique beneficiaries

—

Total services

3,158

Distinct HCPCS

Medicare payment

$320K

Peer benchmark

Total Medicare services vs. 293 Ophthalmology providers in AZ — above median (cohort median 2,550).

PRESCRIBING · PART D · 2024

Total Rx claims

1,095

Beneficiaries

—

Total drug cost

$129K

Distinct drugs

Brand share

28.3%

Top prescribed drugs

Latanoprost317 claims

Prednisolone Acetate188 claims

Timolol Maleate93 claims

Bimatoprost81 claims

Moxifloxacin Hcl62 claims

QUALITY · MIPS · 2024

Final MIPS score

89.7

Quality

81.3

Cost

84.4

Improvement activities

40.0

Promoting interop.

100.0

Payment adjustment

0.62%

Individual

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024

Total received

$462

Payment records

By payment type

Food and Beverage$462

Top paying entities

Food and Beverage$462

REFERRAL NETWORK

Where James Koster's patients come from & go

Directional shared-patient flow from Medicare claims — who sends patients to this provider (inbound) and where this provider's patients go next (outbound). 6 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Raymond Nierva Anesthesiology · Phoenix, AZ	112	346
E. Bloemker Ophthalmology · Phoenix, AZ	29	51
George Yanik Ophthalmology · Phoenix, AZ	18	25
MAYO CLINIC ARIZONA	16	48
Nolawi Mengesha Internal Medicine · Phoenix, AZ	11	28
HONORHEALTH	11	26

Refers patients to

Outbound — where patients go next

No outbound pairs above the suppression threshold.

Source: CMS Physician Shared Patient Patterns (30-day window, Medicare FFS). Direction = a beneficiary seen by the first provider, then the second, within 30 days; a proxy for referral, not a documented referral. Pairs with fewer than 11 shared beneficiaries are suppressed.

CROSS-REFERENCE

Related data on other Healthparse brands

ProviderScore

OIG/SAM exclusion screening, sanctions history

Healthparse Signals

Monitor this provider for changes — dated NPI change events