William A. Appelbaum, M.D. & Associates, S.c.
NPI 1821290461 · Internal Medicine Physician · Chicago, IL
William A. Appelbaum, M.D. & Associates, S.c. is a Internal Medicine Physician organization in Chicago, IL (NPI 1821290461).
Provider details
- NPI number
- 1821290461
- Entity type
- Organization
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- William Appelbaum, President(773) 334-3431
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
19 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
- 2007-06-05
- Last updated
- 2007-07-27
Frequently asked questions
- What is William A. Appelbaum, M.D. & Associates, S.c.'s NPI number?
- William A. Appelbaum, M.D. & Associates, S.c.'s National Provider Identifier (NPI) is 1821290461, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is William A. Appelbaum, M.D. & Associates, S.c.?
- William A. Appelbaum, M.D. & Associates, S.c. is classified in the NPPES registry as Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William A. Appelbaum, M.D. & Associates, S.c. located?
- William A. Appelbaum, M.D. & Associates, S.c.'s practice location on file with NPPES is 2740 W Foster Ave, Chicago, IL 60625-3500.
- What is William A. Appelbaum, M.D. & Associates, S.c.'s phone number?
- The practice phone number listed in the NPPES registry for William A. Appelbaum, M.D. & Associates, S.c. is (773) 334-3431.
- Who is the authorized official for William A. Appelbaum, M.D. & Associates, S.c.?
- The authorized official listed on William A. Appelbaum, M.D. & Associates, S.c.'s NPPES record is William Appelbaum, President. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is William A. Appelbaum, M.D. & Associates, S.c.'s NPI active?
- Yes — William A. Appelbaum, M.D. & Associates, S.c.'s NPI (1821290461) is active in the NPPES registry as of the last update on 2007-07-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.