Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Earl Mark Ryder, OD

Individual provider Optometrist · NPI 1700879335

Earl Mark Ryder, OD is registered under Optometry in Spokane, Washington. Graduated from Pacific University - College of Optometry in 1985, 41 years ago. Practices with Multicare Health System, a 2,302-clinician group and accepts Medicare assignment. Licensed in Washington.

Years since qualifying
41
Trained at
Pacific University - College of Optometry
Licensed in
WA
In the registry since
2005
What do these letters mean?
OD — Doctor of Optometry
An optometrist: examines eyes, prescribes glasses and contacts, and treats many eye conditions.

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Practice location Address checks out

400 E 5th Ave
Spokane, WA 99202
Phone: (509) 838-2531
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Optometrist (primary) Taxonomy 152W00000X · Licence OD00001673 (WA)

Record details

NPI number1700879335
Entity typeIndividual (Type 1)
GenderMale
Credentials OD
Sole proprietorNo
NPI enumeratedAugust 30, 2005
Last updated in NPPESJune 29, 2018

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyOPTOMETRY
Medical schoolPACIFIC UNIVERSITY - COLLEGE OF OPTOMETRY
Graduated 1985 (41 years in practice)
Group practice Multicare Health System — 2302 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations4 on file with Medicare

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Cataract surgery 1–10 times

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients415
Services billed 689 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Colleagues at Multicare Health System

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 2302 clinicians in the practice; 12 are shown here.

Other providers in Spokane