Chicago Arthritis LLC
NPI 1477915221 · Rheumatology Physician · Chicago, IL
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Chicago Arthritis LLC is a Rheumatology Physician organization in Chicago, IL (NPI 1477915221).
Provider details
- NPI number
- 1477915221
- Entity type
- Organization
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Siddharth Tambar, M.D(773) 348-7171
- License
- 036111655 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
10 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Additional practice locations (1)
- 2800 N Sheridan Rd#308Chicago, IL 60657-6156Phone: (773) 348-7171
Registry dates
- Enumerated
- 2016-03-22
- Last updated
- 2024-08-28
- Certified
- 2024-08-28
Frequently asked questions
- What is Chicago Arthritis LLC's NPI number?
- Chicago Arthritis LLC's National Provider Identifier (NPI) is 1477915221, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Chicago Arthritis LLC?
- Chicago Arthritis LLC is classified in the NPPES registry as Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is Chicago Arthritis LLC located?
- Chicago Arthritis LLC's practice location on file with NPPES is 618 W Fulton St, Chicago, IL 60661.
- What is Chicago Arthritis LLC's phone number?
- The practice phone number listed in the NPPES registry for Chicago Arthritis LLC is (773) 348-7171.
- Does Chicago Arthritis LLC accept Medicare?
- Chicago Arthritis LLC is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Chicago Arthritis LLC?
- The authorized official listed on Chicago Arthritis LLC's NPPES record is Siddharth Tambar, M.D. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Chicago Arthritis LLC's NPI active?
- Yes — Chicago Arthritis LLC's NPI (1477915221) is active in the NPPES registry as of the last update on 2024-08-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.