Howard L. Alt, MD, Sc
NPI 1821203720 · Preferred Provider Organization · Chicago, IL
Howard L. Alt, MD, Sc is a Preferred Provider Organization organization in Chicago, IL (NPI 1821203720).
Provider details
- NPI number
- 1821203720
- Entity type
- Organization
- Primary specialty
- Preferred Provider OrganizationManaged Care Organizations
- Organization subpart
- No
- Authorized official
- Howard Alt, President(312) 642-0060
- License
- 36-45795 (IL)
Specialties & taxonomies
Managed Care Organizations
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
- 2007-05-14
- Last updated
- 2008-11-29
Frequently asked questions
- What is Howard L. Alt, MD, Sc's NPI number?
- Howard L. Alt, MD, Sc's National Provider Identifier (NPI) is 1821203720, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Howard L. Alt, MD, Sc?
- Howard L. Alt, MD, Sc is classified in the NPPES registry as Preferred Provider Organization (Managed Care Organizations).
- Where is Howard L. Alt, MD, Sc located?
- Howard L. Alt, MD, Sc's practice location on file with NPPES is 645 N Michigan Ave Ste 422, Chicago, IL 60611-5800.
- What is Howard L. Alt, MD, Sc's phone number?
- The practice phone number listed in the NPPES registry for Howard L. Alt, MD, Sc is (312) 642-0060.
- Who is the authorized official for Howard L. Alt, MD, Sc?
- The authorized official listed on Howard L. Alt, MD, Sc's NPPES record is Howard Alt, President. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Howard L. Alt, MD, Sc's NPI active?
- Yes — Howard L. Alt, MD, Sc's NPI (1821203720) is active in the NPPES registry as of the last update on 2008-11-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.