OrganizationActive
Westside Rheumatology, Inc.
NPI 1821315128 · Rheumatology Physician · Chicago, IL
Westside Rheumatology, Inc. is a Rheumatology Physician organization in Chicago, IL (NPI 1821315128).
Provider details
- NPI number
- 1821315128
- Entity type
- Organization
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Donald Massenburg, Physician(773) 983-5785
- License
- 036115006 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(83/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
16 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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
2875 W 19th St
Chicago, IL 60623-3501
Phone: (773) 983-5785
Fax: (708) 423-9666
Street-level locationGet directions
Mailing address
9449 S Kedzie Ave
Evergreen Park, IL 60805-2325
Registry dates
- Enumerated
- 2010-04-26
- Last updated
- 2010-04-26
Frequently asked questions
- What is Westside Rheumatology, Inc.'s NPI number?
- Westside Rheumatology, Inc.'s National Provider Identifier (NPI) is 1821315128, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Westside Rheumatology, Inc.?
- Westside Rheumatology, Inc. is classified in the NPPES registry as Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is Westside Rheumatology, Inc. located?
- Westside Rheumatology, Inc.'s practice location on file with NPPES is 2875 W 19th St, Chicago, IL 60623-3501.
- What is Westside Rheumatology, Inc.'s phone number?
- The practice phone number listed in the NPPES registry for Westside Rheumatology, Inc. is (773) 983-5785.
- Who is the authorized official for Westside Rheumatology, Inc.?
- The authorized official listed on Westside Rheumatology, Inc.'s NPPES record is Donald Massenburg, Physician. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Westside Rheumatology, Inc.'s NPI active?
- Yes — Westside Rheumatology, Inc.'s NPI (1821315128) is active in the NPPES registry as of the last update on 2010-04-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.