Physician

Gayle L Shimokaji, MD

According to 2025 Medicare claims, Gayle Shimokaji, MD (NPI: 1912099672) practices ophthalmology in the San Rafael, CA market, with the plurality of this provider's patient population coming from Marin, CA. Shimokaji uses personal NPI as billing NPI and primary practice location at 94904-2151.

Shimokaji's data goes back to 2015 and runs through 2024. For example, in 2024, this provider had 134 traditional Medicare patients, billed 6,455 HCPCS/CPT codes, and received $481,392 in Medicare payments. The top billing code was 99215 (Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more). Part D data shows 356 prescription claims across 64 beneficiaries totaling $69,419 in drug costs, led by Lumigan (Bimatoprost). Open Payments data shows 13 records totaling $2,866. You can download detailed data with all billing codes (2015-2024). For more recent data, please contact us.

Over the past 10 years, this provider's Medicare Part B carrier billing did not follow a clear longitudinal pattern. Concurrently, Part D prescription costs did not follow a clear longitudinal pattern. For DME billing, this provider has fewer than 5 years of reported data, so a reliable trend cannot be assigned.

Part B Carrier Billing Trend

Medicare payment trend, with N of patients and claim lines in the table.

Year	Patients	Clm Lines	Payment
2015	308	1,545	$162,382
2016	335	1,598	$148,936
2017	235	1,520	$112,343
2018	239	1,317	$114,830
2019	231	1,372	$123,570
2020	193	988	$85,652
2021	197	1,316	$124,563
2022	176	1,307	$155,470
2023	173	1,182	$203,404
2024	134	6,455	$481,392

Part D Events Trend

Drug cost trend, with N of patients and prescription claims in the table.

Year	Patients	Claims	Drug Cost
2015	119	636	$88,434
2016	107	544	$84,649
2017	115	661	$114,215
2018	100	591	$121,383
2019	97	507	$118,648
2020	99	546	$120,368
2021	86	461	$106,244
2022	79	463	$110,373
2023	65	473	$113,019
2024	64	356	$69,419

DME Billing Trend

Medicare payment trend, with N of patients and DME claim records in the table.

No connected DME records

* / # = suppressed by CMS; 0 = reported zero; N/R = not reported or blank.

Top 5 Part B carrier billing codes in 2024

By total payments.

Code	Description	Patients	Clm Lines	Total Payment
99215	Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	79	98	$163
99213	Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more	83	140	$82
92083	Exam of visual field with extended testing	72	87	$58
99484	Care management services for behavioral health conditions, 20 minutes or more clinical staff time directed by health care professional	72	555	$52
92250	Photography of the retina	75	100	$36

Top 5 Part D drugs in 2024

By total drug costs.

Drug	Generic	Claims	Total Day Supply	Total Drug Cost
Lumigan	Bimatoprost	44	1,822	$18,834
Restasis	Cyclosporine	12	480	$9,968
Rhopressa	Netarsudil Mesylate	16	775	$7,945
Brimonidine Tartrate	Brimonidine Tartrate	24	1,048	$5,264
Brimonidine Tartrate-Timolol	Brimonidine Tartrate/Timolol	33	1,540	$3,632

Top 5 DME services in 2024

No connected or detailed DME service-level records for 2024.

Open Payments Summary in 2024

Category	Definition	Records	Total Reported Amount	Top Related Entity
General Payments	Reported payment or transfer-of-value amount.	13	$2,866	ConvaTec Inc.
Research Payments	Reported research-related payment or transfer-of-value amount.	0	$0	N/R
Ownership / Investment Interests	Reported value of ownership or investment interests.	0	$0	N/R

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FAQ

What Medicare data is available for Gayle L. Shimokaji, MD?

Tedicare shows public-source Medicare data for Gayle L. Shimokaji, MD (NPI 1912099672), including provider identity, specialty, market context, Medicare Part B activity, Part D prescribing, DME records, Open Payments where available, billing organization details, and ACO affiliation signals where available. Profile data covers 2015-2024, with current attribution based on 2025 claims where available.

Does Gayle L. Shimokaji, MD have ACO affiliation data?

No ACO affiliation record is shown in the available Tedicare data for this profile.

What billing organization is linked to Gayle L. Shimokaji, MD?

A separate primary affiliated billing organization is not shown for this profile in the available data.

Does Gayle L. Shimokaji, MD have Open Payments data?

Gayle L. Shimokaji, MD has 13 connected Open Payments records in the available 2024 summary data.

Can I download physician-level Medicare data from Tedicare?

Yes. Tedicare provides sample physician export data and paid custom physician data exports for research, planning, outreach, and market analysis. Exports can include physician profile fields, market and specialty context, billing organization details, ACO affiliation signals where available, and Medicare utilization data.