Grant Barish, M.D.
NPI 1265526073 · Endocrinology, Diabetes & Metabolism Physician · Chicago, IL
Enrolled with Medicare as Practitioner - Endocrinology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Grant Barish, M.D. is a Endocrinology, Diabetes & Metabolism Physician provider in Chicago, IL (NPI 1265526073).
Provider details
- NPI number
- 1265526073
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 036.130667 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
- 2006-10-03
- Last updated
- 2026-04-04
- Certified
- 2026-04-04
Frequently asked questions
- What is Grant Barish's NPI number?
- Grant Barish's National Provider Identifier (NPI) is 1265526073, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Grant Barish's specialty?
- Grant Barish is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is Grant Barish located?
- Grant Barish's practice location on file with NPPES is 675 N Saint Clair St, Chicago, IL 60611-5975.
- What is Grant Barish's phone number?
- The practice phone number listed in the NPPES registry for Grant Barish is (312) 695-7970.
- Does Grant Barish accept Medicare?
- Grant Barish is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Grant Barish's NPI active?
- Yes — Grant Barish's NPI (1265526073) is active in the NPPES registry as of the last update on 2026-04-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.