Sidney Feldman, S.c.
NPI 1639417462 · Internal Medicine Physician · Chicago, IL
Sidney Feldman, S.c. is a Internal Medicine Physician organization in Chicago, IL (NPI 1639417462).
Provider details
- NPI number
- 1639417462
- Entity type
- Organization
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Sidney Feldman, President(773) 296-3700
- License
- 03636975 (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
13 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
Mailing address
Registry dates
- Enumerated
- 2013-01-29
- Last updated
- 2013-01-29
Frequently asked questions
- What is Sidney Feldman, S.c.'s NPI number?
- Sidney Feldman, S.c.'s National Provider Identifier (NPI) is 1639417462, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Sidney Feldman, S.c.?
- Sidney Feldman, S.c. is classified in the NPPES registry as Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Sidney Feldman, S.c. located?
- Sidney Feldman, S.c.'s practice location on file with NPPES is 3000 N Halsted St, Chicago, IL 60657-5188.
- What is Sidney Feldman, S.c.'s phone number?
- The practice phone number listed in the NPPES registry for Sidney Feldman, S.c. is (773) 296-3700.
- Who is the authorized official for Sidney Feldman, S.c.?
- The authorized official listed on Sidney Feldman, S.c.'s NPPES record is Sidney Feldman, President. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Sidney Feldman, S.c.'s NPI active?
- Yes — Sidney Feldman, S.c.'s NPI (1639417462) is active in the NPPES registry as of the last update on 2013-01-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.