John Jacob Kakkanathu, M.D.
Internal Medicine Physician · Saint Louis, MO
John Jacob Kakkanathu, M.D. is an internal medicine physician with a practice address in Saint Louis, Missouri, and NPI 1346458411, issued on May 20, 2007. Check the license (Missouri 2009008964, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.
- Name
- John Jacob Kakkanathu
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 2009008964 MO
Self-reported in NPPES; status is on the state search - Practice location
- 621 S New Ballas RD, Saint Louis, MO 63141
- Phone
- (314) 251-6339
- Enumerated
- May 20, 2007
- Record last updated
- Jul 17, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (314) 251-4564
- Medicaid ID
- 1346458411 MO
- Medicare enrollment
- Enrolled (PECOS I20090825000716); accepts Medicare assignment
- Medical or professional school
- University Of Illinois College Of Med (Chi/Peor/Rock/Chm-Urb), 2006
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,604 in Missouri → Look up another NPI →
Also registered at 621 S New Ballas RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify John Jacob Kakkanathu 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 2009008964Check 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 internal medicine physician in 2024
228 Medicare Part D claims for 106 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims. 34 claims were for opioids.
Most prescribed
- Oxycodone Hcl15 claims
- Ciprofloxacin Hcl14 claims
- Prednisone12 claims
- Hydrocodone-Acetaminophen11 claims
- Pantoprazole Sodium11 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.
Bills Medicare through one group practice
- Mercy Clinic Adult Hospitalists - St. Louis, LLCSaint Louis, MO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Jacob Kakkanathu among 2,604 internal medicine physician records in Missouri
John Jacob Kakkanathu, M.D. is one of 2,604 internal medicine physician records with a practice address in Missouri. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 41% of them.
- NPI issued2007 · 41% of these records are older, 53% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 55% of these records are
- Graduated2006 · median 2006 among the 1,443 with a school on file
- Record last updated2014 · 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 207R00000X and a Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
941 internal medicine physician records list a practice address in Saint Louis
They are 941 of the 27,605 NPPES records with a practice address in Saint Louis, and 2,604 internal medicine physician records in Missouri.
All 2,604 in Missouri → Every provider in Saint Louis → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Daniel Bauer, MDSaint Louis, MO 631411144222506
- Michele Bellamy, MDCreve Coeur, MO 631411134194863
- Shobha Dixit, MDSaint Louis, MO 631411902871650
- Carolyn Koenig, MDSaint Louis, MO 631411063488278
- Bernard McGuire, M.D.Saint Louis, MO 631411942274030
- Angela Miller, M.D.Saint Louis, MO 631411184605883
- C Molden, MDSaint Louis, MO 631411720086747
- Margaret Murphy, M.D.Saint Louis, MO 631411043285745
Common questions
What is John Jacob Kakkanathu, M.D.'s NPI number?
John Jacob Kakkanathu, M.D.'s National Provider Identifier (NPI) is 1346458411, issued on May 20, 2007. An NPI identifies a provider in billing; it is not a license.
Where is John Jacob Kakkanathu, M.D. located?
The NPPES record lists a practice address at 621 S New Ballas RD, Saint Louis, MO, 63141. Phone: (314) 251-6339. Providers update this record themselves, so call before visiting.
How can I verify John Jacob Kakkanathu, M.D.'s license?
NPPES lists Missouri license number 2009008964, 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 John Jacob Kakkanathu, M.D. prescribe under Medicare Part D?
In 2024, John Jacob Kakkanathu, M.D. had 228 Medicare Part D claims for 106 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.