Mervyn Weis, MD
NPI 1043212954 · Gastroenterology Physician · Chicago, IL
Mervyn Weis, MD is a Gastroenterology Physician provider in Chicago, IL (NPI 1043212954).
Provider details
- NPI number
- 1043212954
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
Specialties & taxonomies
Allopathic & Osteopathic Physicians
- Internal Medicine Physician207R00000X
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
83% 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
- 2005-08-11
- Last updated
- 2025-09-11
Frequently asked questions
- What is Mervyn Weis's NPI number?
- Mervyn Weis's National Provider Identifier (NPI) is 1043212954, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mervyn Weis's specialty?
- Mervyn Weis is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Mervyn Weis located?
- Mervyn Weis's practice location on file with NPPES is 4640 N Marine Dr, Chicago, IL 60640-5719.
- What is Mervyn Weis's phone number?
- The practice phone number listed in the NPPES registry for Mervyn Weis is (773) 769-4411.
- Is Mervyn Weis's NPI active?
- Yes — Mervyn Weis's NPI (1043212954) is active in the NPPES registry as of the last update on 2025-09-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.