IndividualActive
Mary Gerard, M.D.
NPI 1255453270 · Internal Medicine Physician · Chicago, IL
Mary Gerard, M.D. is a Internal Medicine Physician provider in Chicago, IL (NPI 1255453270).
Provider details
- NPI number
- 1255453270
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(83/100 index)
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
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
1901 W Harrison St
Chicago, IL 60612-3714
Phone: (312) 864-8077
Fax: (312) 864-9899
Street-level locationGet directions
Mailing address
333 Wisconsin Ave
Oak Park, IL 60302-3401
Registry dates
- Enumerated
- 2007-04-03
- Last updated
- 2007-07-08
Frequently asked questions
- What is Mary Gerard's NPI number?
- Mary Gerard's National Provider Identifier (NPI) is 1255453270, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Gerard's specialty?
- Mary Gerard is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mary Gerard located?
- Mary Gerard's practice location on file with NPPES is 1901 W Harrison St, Chicago, IL 60612-3714.
- What is Mary Gerard's phone number?
- The practice phone number listed in the NPPES registry for Mary Gerard is (312) 864-8077.
- Is Mary Gerard's NPI active?
- Yes — Mary Gerard's NPI (1255453270) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.