Dr. Fredrick Ellyin, Ltd
NPI 1598847642 · Endocrinology, Diabetes & Metabolism Physician · Chicago, IL
Dr. Fredrick Ellyin, Ltd is a Endocrinology, Diabetes & Metabolism Physician organization in Chicago, IL (NPI 1598847642).
Provider details
- NPI number
- 1598847642
- Entity type
- Organization
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Fredrick Ellyin, Owner(773) 275-0177
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
- 2006-10-19
- Last updated
- 2008-04-20
Frequently asked questions
- What is Dr. Fredrick Ellyin, Ltd's NPI number?
- Dr. Fredrick Ellyin, Ltd's National Provider Identifier (NPI) is 1598847642, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Dr. Fredrick Ellyin, Ltd?
- Dr. Fredrick Ellyin, Ltd is classified in the NPPES registry as Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is Dr. Fredrick Ellyin, Ltd located?
- Dr. Fredrick Ellyin, Ltd's practice location on file with NPPES is 5140 N California Ave, Chicago, IL 60625-3645.
- What is Dr. Fredrick Ellyin, Ltd's phone number?
- The practice phone number listed in the NPPES registry for Dr. Fredrick Ellyin, Ltd is (773) 275-0177.
- Who is the authorized official for Dr. Fredrick Ellyin, Ltd?
- The authorized official listed on Dr. Fredrick Ellyin, Ltd's NPPES record is Fredrick Ellyin, Owner. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Dr. Fredrick Ellyin, Ltd's NPI active?
- Yes — Dr. Fredrick Ellyin, Ltd's NPI (1598847642) is active in the NPPES registry as of the last update on 2008-04-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.