Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Dr. Siddharth Tambar, MD

Individual provider Internal Medicine Physician · NPI 1477655488

Dr. Siddharth Tambar, MD is a Rheumatology in Chicago, Illinois. Qualified in 2001, 25 years ago. Practices as a sole proprietor, accepts Medicare assignment and offers telehealth. Licensed in Illinois.

Years since qualifying
25
Licensed in
IL
In the registry since
2006
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

618 W Fulton St
Chicago, IL 60661-1144
Phone: (773) 348-7171
Fax: (737) 348-7414
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Rheumatology Physician (primary) Taxonomy 207RR0500X · Licence 036-111655 (IL)
Internal Medicine Physician Taxonomy 207R00000X · Licence 036-111655 (IL)

Record details

NPI number1477655488
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedSeptember 1, 2006
Last updated in NPPESFebruary 25, 2026
Certification dateFebruary 25, 2026

Medicare enrollment

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

Medicare specialtyRHEUMATOLOGY
Medical schoolOTHER
Graduated 2001 (25 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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