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

Dr. Cassandra Jo Haddox, DO

Individual provider Emergency Medicine Physician · NPI 1659606929

Dr. Cassandra Jo Haddox, DO practises Emergency Medicine in Saint Louis, Missouri. Graduated from Kansas City University of Physicians and Surgeons in 2006, 20 years ago. Practices with Washington University Community Specialists LLC, a 95-clinician group and accepts Medicare assignment. Licensed in Illinois and Missouri.

Years since qualifying
20
Trained at
Kansas City University of Physicians and Surgeons
Licensed in
IL, MO
In the registry since
2009
Specialties on file
2
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

3015 N Ballas Rd Dept Emergency Med
Saint Louis, MO 63131-2329
Phone: (314) 966-5000
Fax: (314) 747-3338
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence 2009010648 (MO)
Emergency Medicine Physician Taxonomy 207P00000X · Licence 036.148472 (IL)

Record details

NPI number1659606929
Entity typeIndividual (Type 1)
GenderFemale
Credentials DO
Sole proprietorNo
NPI enumeratedOctober 5, 2009
Last updated in NPPESSeptember 16, 2026
Certification dateSeptember 16, 2026

Medicare enrollment

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

Medicare specialtyEMERGENCY MEDICINE
Medical schoolKANSAS CITY UNIVERSITY OF PHYSICIANS AND SURGEONS
Graduated 2006 (20 years in practice)
Group practice Washington University Community Specialists Llc — 95 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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 nail tissue 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 patients148
Services billed 199 a service is one billed item, such as a visit, a test or a procedure
Average patient age71

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. Those with a page here are linked.

Colleagues at Washington University Community Specialists LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 95 clinicians in the practice; 12 are shown here.

Other providers in Saint Louis