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

Roger D. Dainer, DO

Individual provider Orthopaedic Surgery Physician · NPI 1427053560

Roger D. Dainer, DO practises Orthopedic Surgery in Pleasanton, California. Graduated from At Still University of Health Sciences, College of Osteo Med, Kirksville in 1981, 45 years ago. Practices with Bass Medical Group, a 292-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
45
Trained at
At Still University of Health Sciences, College of Osteo Med, Kirksville
Licensed in
CA
In the registry since
2005
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

4626 Willow Rd Ste 200
Pleasanton, CA 94588-8564
Phone: (925) 463-0470
Fax: (925) 463-0473
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Orthopaedic Surgery Physician (primary) Taxonomy 207X00000X · Licence 20A4823 (CA)

Record details

NPI number1427053560
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedJune 16, 2005
Last updated in NPPESJanuary 2, 2025
Certification dateJanuary 2, 2025

Medicare enrollment

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

Medicare specialtyORTHOPEDIC SURGERY
Medical schoolAT STILL UNIVERSITY OF HEALTH SCIENCES, COLLEGE OF OSTEO MED, KIRKSVILLE
Graduated 1981 (45 years in practice)
Group practice Bass Medical Group — 292 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 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.

Lower limb (leg) arthroscopy (minimally invasive joint repair) 1–10 times
Upper limb (arm) arthroscopy (minimally invasive joint repair) 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 patients197
Services billed 1,192 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.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Bass Medical Group

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 292 clinicians in the practice; 12 are shown here.

Other providers in Pleasanton