Mary Atten, M.D.
NPI 1164436887 · Gastroenterology Physician · Chicago, IL
Mary Atten, M.D. is a Gastroenterology Physician provider in Chicago, IL (NPI 1164436887).
Provider details
- NPI number
- 1164436887
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 036-081688 (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 tenure33% of score
19 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- 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.
$28 across 1 record (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
Registry dates
- Enumerated
- 2006-07-28
- Last updated
- 2021-04-21
- Certified
- 2021-04-21
Frequently asked questions
- What is Mary Atten's NPI number?
- Mary Atten's National Provider Identifier (NPI) is 1164436887, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Atten's specialty?
- Mary Atten is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Mary Atten located?
- Mary Atten's practice location on file with NPPES is 1901 W Harrison St, Chicago, IL 60612-3714.
- What is Mary Atten's phone number?
- The practice phone number listed in the NPPES registry for Mary Atten is (312) 864-6000.
- Is Mary Atten's NPI active?
- Yes — Mary Atten's NPI (1164436887) is active in the NPPES registry as of the last update on 2021-04-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.