Gajaan Krishaen Sittambalam
General Practice Physician · Chicago, IL
Gajaan Krishaen Sittambalam is a general practice physician with a practice address in Chicago, Illinois, and NPI 1124764931, issued on May 5, 2022. Check the license on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Gajaan Krishaen Sittambalam
- Primary taxonomy
- General Practice Physician 208D00000X
- License number
- 1124764931 CA
Self-reported in NPPES; status is on the state search - Practice location
- 600 S Paulina St Ste 403, Chicago, IL 60612
- Phone
- (312) 942-7100
- Enumerated
- May 5, 2022
- Record last updated
- Nov 14, 2024
- Entity
- Type 1 · individual
8 nearest general practice physician records → All 291 in Illinois → Look up another NPI →
Also registered at 600 S Paulina St Ste 403
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Gajaan Krishaen Sittambalam in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional RegulationCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average general practice physician in 2024
18 Medicare Part D claims for 11 beneficiaries, against an average of 3,030 among the 8,395 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.
Gajaan Krishaen Sittambalam among 291 general practice physician records in Illinois
Gajaan Krishaen Sittambalam is one of 291 general practice physician records with a practice address in Illinois. 42% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2022, is newer than 90% of them.
- NPI issued2022 · 90% of these records are older, 7% newer
- In a Medicare fileYes · 42% of these records are
- In the CMS Doctors and Clinicians fileNo · 18% of these records are
- Record last updated2024 · 67% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208D00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
General Practice Physician providers in Illinois
There are 291 general practice physician records in Illinois.
All 291 in Illinois → Every provider in Chicago → General Practice Physician nationwide →
The 8 general practice physician records with the nearest ZIP codes
- Mohammed Ahmed, M.D.Chicago, IL 606121427035500
- Katharine DicksonChicago, IL 606121801038732
- Roy Eapen, M.D.Chicago, IL 606121780392399
- Joanne Jiang, DOChicago, IL 606121730070715
- Annette Luo, M.D.Chicago, IL 606121629658455
- Gajendra MaharjanChicago, IL 606121962078923
- Andria Meyer, DOChicago, IL 606121326831876
- William Pintelon, DOChicago, IL 606121033840509
Common questions
What is Gajaan Krishaen Sittambalam's NPI number?
Gajaan Krishaen Sittambalam's National Provider Identifier (NPI) is 1124764931, issued on May 5, 2022. An NPI identifies a provider in billing; it is not a license.
Where is Gajaan Krishaen Sittambalam located?
The NPPES record lists a practice address at 600 S Paulina St Ste 403, Chicago, IL, 60612. Phone: (312) 942-7100. Providers update this record themselves, so call before visiting.
How can I verify Gajaan Krishaen Sittambalam's license?
Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Gajaan Krishaen Sittambalam prescribe under Medicare Part D?
In 2024, Gajaan Krishaen Sittambalam had 18 Medicare Part D claims for 11 beneficiaries; the average among general practice physician prescribers was 3,030. 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.