Cassandra Jo Haddox, DO
Emergency Medicine Physician · Saint Louis, MO
Cassandra Jo Haddox, DO is an emergency medicine physician with a practice address in Saint Louis, Missouri, and NPI 1659606929, issued on Oct 5, 2009. Check the license (Missouri 2009010648, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.
- Name
- Cassandra Jo Haddox
- Credential
- DO
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 2009010648 MO
Self-reported in NPPES; status is on the state search - Practice location
- 3015 N Ballas RD, Saint Louis, MO 63131
- Phone
- (314) 966-5000
- Enumerated
- Oct 5, 2009
- Record last updated
- May 1, 2025
- Fax
- (314) 747-3338
- Medicaid ID
- 207066408 MO
- Medicare enrollment
- Enrolled (PECOS I20090923000587); accepts Medicare assignment
- Medical or professional school
- Kansas City University Of Physicians And Surgeons, 2006
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,405 in Missouri → Look up another NPI →
Also registered at 3015 N Ballas RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kimberly Abeln, CRNACertified Registered Nurse Anesthetist1851566970
- Nancy Adams, FNP - BCFamily Nurse Practitioner1497280796
- Emmanuel Agyemang, MDHospitalist Physician1235831975
- Ayaz Ahmad, MDInternal Medicine Physician1629573142
- Bazgha AhmadHospitalist Physician1841517158
- Nusrat Ahmad, MDObstetrics & Gynecology Physician1114966348
Verify Cassandra Jo Haddox in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMissouri Board of Registration for the Healing Arts
Search for license 2009010648Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
31% fewer Medicare Part D claims than the average emergency medicine physician in 2024
157 Medicare Part D claims for 88 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims. 11 claims were for opioids.
Most prescribed
- Prednisone13 claims
- Cephalexin12 claims
- Ondansetron Hcl12 claims
- Amlodipine Besylate11 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 89.6 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through 2 group practices
- Washington UniversitySaint Louis, MO
- Washington University Community Specialists, LLCSaint Louis, MO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Cassandra Jo Haddox among 1,405 emergency medicine physician records in Missouri
Cassandra Jo Haddox, DO is one of 1,405 emergency medicine physician records with a practice address in Missouri. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 51% of them.
- NPI issued2009 · 51% of these records are older, 47% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated2006 · median 2012 among the 808 with a school on file
- Record last updated2025 · 48% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
398 emergency medicine physician records list a practice address in Saint Louis
They are 398 of the 27,605 NPPES records with a practice address in Saint Louis, and 1,405 emergency medicine physician records in Missouri.
All 1,405 in Missouri → Every provider in Saint Louis → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Gregory Beirne, DOSaint Louis, MO 631311891707097
- Cindy Bitter, M.D.Saint Louis, MO 631311083647556
- Candice Booth, MDSaint Louis, MO 631311851418883
- Mitchell Cordover, MDSaint Louis, MO 631311902978406
- Benedict D'Souza, MDSaint Louis, MO 631311811900574
- Jeffrey Davis, MDSaint Louis, MO 631311922183680
- Joseph Galkowski, DOSaint Louis, MO 631311194707612
- Grace Jones, DOSaint Louis, MO 631311992742928
Common questions
What is Cassandra Jo Haddox, DO's NPI number?
Cassandra Jo Haddox, DO's National Provider Identifier (NPI) is 1659606929, issued on Oct 5, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Cassandra Jo Haddox, DO located?
The NPPES record lists a practice address at 3015 N Ballas RD, Saint Louis, MO, 63131. Phone: (314) 966-5000. Providers update this record themselves, so call before visiting.
How can I verify Cassandra Jo Haddox, DO's license?
NPPES lists Missouri license number 2009010648, as entered by the provider. Search the Missouri Board of Registration for the Healing Arts at https://www.fsmb.org/contact-a-state-medical-board/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Cassandra Jo Haddox, DO prescribe under Medicare Part D?
In 2024, Cassandra Jo Haddox, DO had 157 Medicare Part D claims for 88 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Cassandra Jo Haddox, DO's MIPS final score?
The 2023 MIPS final score is 89.6 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.