Ofer Fass, MD
NPI 1154856714 · Gastroenterology Physician · Chicago, IL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ofer Fass, MD is a Gastroenterology Physician provider in Chicago, IL (NPI 1154856714).
Provider details
- NPI number
- 1154856714
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 298903 (NY)
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 tenure33% of score
9 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
2 documented practice locations
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$677 across 6 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 550 1st AveNew York, NY 10016-6402Phone: (646) 929-7870
Registry dates
- Enumerated
- 2017-04-20
- Last updated
- 2024-12-17
- Certified
- 2024-12-17
Frequently asked questions
- What is Ofer Fass's NPI number?
- Ofer Fass's National Provider Identifier (NPI) is 1154856714, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ofer Fass's specialty?
- Ofer Fass is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Ofer Fass located?
- Ofer Fass's practice location on file with NPPES is 259 E Erie St Ste 1600, Chicago, IL 60611-3111.
- What is Ofer Fass's phone number?
- The practice phone number listed in the NPPES registry for Ofer Fass is (312) 695-5620.
- Does Ofer Fass accept Medicare?
- Ofer Fass is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ofer Fass's NPI active?
- Yes — Ofer Fass's NPI (1154856714) is active in the NPPES registry as of the last update on 2024-12-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.