Sarah Messmer, MD
NPI 1073926929 · Internal Medicine Physician · Chicago, IL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sarah Messmer, MD is a Internal Medicine Physician provider in Chicago, IL (NPI 1073926929).
Provider details
- NPI number
- 1073926929
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 036.145844 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
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
12 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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
Additional practice locations (1)
- 1740 W Taylor StChicago, IL 60612-7232Phone: (312) 996-7416
Registry dates
- Enumerated
- 2014-06-09
- Last updated
- 2025-10-31
- Certified
- 2025-10-31
Frequently asked questions
- What is Sarah Messmer's NPI number?
- Sarah Messmer's National Provider Identifier (NPI) is 1073926929, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sarah Messmer's specialty?
- Sarah Messmer is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Sarah Messmer located?
- Sarah Messmer's practice location on file with NPPES is 840 S Wood St, Chicago, IL 60612.
- What is Sarah Messmer's phone number?
- The practice phone number listed in the NPPES registry for Sarah Messmer is (312) 996-4242.
- Does Sarah Messmer accept Medicare?
- Sarah Messmer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sarah Messmer's NPI active?
- Yes — Sarah Messmer's NPI (1073926929) is active in the NPPES registry as of the last update on 2025-10-31.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.