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

Dr. John Oneil Simmonds, MD

Individual provider Orthopaedic Surgery Physician · NPI 1801195912

Dr. John Oneil Simmonds, MD practises Orthopedic Surgery in Los Angeles, California. Graduated from Howard University College of Medicine in 2001, 25 years ago. Practices with Harbor Comprehensive Health Inc, a 2-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
25
Trained at
Howard University College of Medicine
Licensed in
CA
In the registry since
2011
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

11901 Santa Monica Blvd Ste 620
Los Angeles, CA 90025-5189
Phone: (310) 614-2663
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

Orthopaedic Surgery Physician (primary) Taxonomy 207X00000X · Licence A100364 (CA)

Record details

NPI number1801195912
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedMarch 15, 2011
Last updated in NPPESFebruary 26, 2021
Certification dateFebruary 26, 2021

Medicare enrollment

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

Medicare specialtyORTHOPEDIC SURGERY
Medical schoolHOWARD UNIVERSITY COLLEGE OF MEDICINE
Graduated 2001 (25 years in practice)
Group practice Harbor Comprehensive Health Inc — 2 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 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.

Removal of tissue 3,235 times · 99th percentile
Removal of skin lesions 136 times · 77th percentile
Removal or shaving of skin growth 38 times · 77th percentile

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 patients784
Services billed 19,267 a service is one billed item, such as a visit, a test or a procedure
Average patient age76

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.

Other providers in Los Angeles