Ruth Chacko, M.D.
Emergency Medicine Physician · Saint Louis, MO
Ruth Chacko, M.D. is an emergency medicine physician with a practice address in Saint Louis, Missouri, and NPI 1093754715, issued on Jun 6, 2006. Check the license (Missouri R9305, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.
- Name
- Ruth Chacko
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- R9305 MO
036060005 IL
Self-reported in NPPES; status is on the state search - Practice location
- 6420 Clayton RD, Saint Louis, MO 63117
- Phone
- (314) 768-8000
- Enumerated
- Jun 6, 2006
- Record last updated
- May 26, 2009 (not updated in 17 years: call before relying on the address or phone)
- Fax
- (314) 768-8011
- Medicaid ID
- 1093754715 MO
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,405 in Missouri → Look up another NPI →
Also registered at 6420 Clayton RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Ruth Chacko 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 R9305Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
93% fewer Medicare Part D claims than the average emergency medicine physician in 2024
16 Medicare Part D claims, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
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.
Ruth Chacko among 1,405 emergency medicine physician records in Missouri
Ruth Chacko, M.D. 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 2006, is newer than 8% of them.
- NPI issued2006 · 8% of these records are older, 59% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileNo · 58% of these records are
- Record last updated2009 · 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
- Linda Bick, M.D.Richmond Heights, MO 631171699717728
- Erin Gerhardt, D.O.Richmond Heights, MO 631171962607598
- William Gilmore, MDRichmond Heights, MO 631171962587170
- Benjamin Kober, D.O.Richmond Heights, MO 631171518312487
- Kimberly Lederman, M.D.Richmond Heights, MO 631171770682379
- Meghna Nagabhushan, DORichmond Heights, MO 631171710326681
- Curren Osborne, MDRichmond Heights, MO 631171063943124
- Jonathan Rill, MDSaint Louis, MO 631171386683985
Common questions
What is Ruth Chacko, M.D.'s NPI number?
Ruth Chacko, M.D.'s National Provider Identifier (NPI) is 1093754715, issued on Jun 6, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Ruth Chacko, M.D. located?
The NPPES record lists a practice address at 6420 Clayton RD, Saint Louis, MO, 63117. Phone: (314) 768-8000. Providers update this record themselves, so call before visiting.
How can I verify Ruth Chacko, M.D.'s license?
NPPES lists Missouri license number R9305, 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 Ruth Chacko, M.D. prescribe under Medicare Part D?
In 2024, Ruth Chacko, M.D. had 16 Medicare Part D claims; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
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.