OrganizationActive
Oscar L Alonso MD Sc
NPI 1972764538 · Specialist · Downers Grove, IL
Oscar L Alonso MD Sc is a Specialist organization in Downers Grove, IL (NPI 1972764538).
Provider details
- NPI number
- 1972764538
- Entity type
- Organization
- Primary specialty
- SpecialistOther Service Providers
- Organization subpart
- No
- Authorized official
- Oscar Alonso, Owner(630) 960-5310
- License
- 036064967 (IL)
Specialties & taxonomies
Other Service Providers
Profile Score
Detailed profile(87/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
18 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
1034 Warren Ave
Downers Grove, IL 60515-3601
Phone: (630) 960-5310
Fax: (630) 969-7841
Street-level locationGet directions
Mailing address
1121 Warren Ave Ste 200
Downers Grove, IL 60515-3572
Registry dates
- Enumerated
- 2008-06-17
- Last updated
- 2020-12-22
- Certified
- 2020-12-22
Frequently asked questions
- What is Oscar L Alonso MD Sc's NPI number?
- Oscar L Alonso MD Sc's National Provider Identifier (NPI) is 1972764538, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Oscar L Alonso MD Sc?
- Oscar L Alonso MD Sc is classified in the NPPES registry as Specialist (Other Service Providers).
- Where is Oscar L Alonso MD Sc located?
- Oscar L Alonso MD Sc's practice location on file with NPPES is 1034 Warren Ave, Downers Grove, IL 60515-3601.
- What is Oscar L Alonso MD Sc's phone number?
- The practice phone number listed in the NPPES registry for Oscar L Alonso MD Sc is (630) 960-5310.
- Who is the authorized official for Oscar L Alonso MD Sc?
- The authorized official listed on Oscar L Alonso MD Sc's NPPES record is Oscar Alonso, Owner. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Oscar L Alonso MD Sc's NPI active?
- Yes — Oscar L Alonso MD Sc's NPI (1972764538) is active in the NPPES registry as of the last update on 2020-12-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.