1. Home
  2. Directory
  3. Illinois
  4. Chicago
  5. Internal Medicine
  6. NPI Profile

SARAH E MESSMER MD
NPI 1073926929
Internal Medicine in Chicago, IL

Active since June 09, 2014PECOS Enrolled
87.08/100
CMS Quality Rating
840 S WOOD ST, ROOM 440 CLINICAL SCIENCES NORTH BUILDING, CHICAGO, IL 60612(312) 996-4242 Get Directions Write a Review

NPPES record last updated: October 31, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Sarah E Messmer Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

SARAH E MESSMER MD (NPI 1073926929) is an individual internal medicine provider in Chicago, Illinois, licensed in Illinois (036.145844) and active in the NPI registry since June 2014. She is enrolled in Medicare PECOS, maintains a secondary practice location in Chicago, and is a graduate of Harvard Medical School (2014).

NPPES Registry Identity

NPI1073926929
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameSARAH E MESSMERCredential: MD
Location Address840 S WOOD ST, ROOM 440 CLINICAL SCIENCES NORTH BUILDINGChicago, IL 60612
Mailing Address840 S Wood Street, Room 440 Clinical Sciences North BuildingChicago, IL 60612 · (312) 996-4242
Phone(312) 996-4242
Sole ProprietorNo
Medical School CMSHarvard Medical SchoolGraduated 2014
Enumeration DateJune 9, 2014
Last NPPES UpdateOctober 31, 2025
NPPES CertifiedOctober 31, 2025
✔ NPI 1073926929 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in IL · 036.145844
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Also ListedInternal Medicine · Addiction MedicineTaxonomy 207RA0401X · License 036.145844 (IL)
Also ListedPediatricsTaxonomy 208000000X · License L-259415 (MA), 036.145844 (IL)
840 S WOOD ST, Chicago, IL 60612
Open in Google Maps ↗

Secondary Practice Location 1

Location 11740 W Taylor StChicago, IL 60612-7232 · Phone (312) 996-7416

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Sarah E Messmer Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID5799902094
PECOS Enrollment IDI20250718000046
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60612 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$138.86 typical visit price
range $60.08 – $183.39
Typical copayment $34.71 (range $15.02 – $45.84)
Most-billed visit code 99204
Established Patient
$105.70 typical visit price
range $18.97 – $148.12
Typical copayment $26.42 (range $4.74 – $37.03)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

87.08/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality70.79
Promoting Interoperability100
Improvement Activities40
Cost52.82

Referred Medical Equipment & Supplies CMS DME claims 3

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Wheelchair accessory, headrest, cushioned, any type, including fixed mounting hardware, each E0955
DME-Wheelchairs · category DD021N
1 supplier12 claims12 services$13.34 avg. paid by Medicare
Wheelchair accessory, manual swingaway, retractable or removable mounting hardware for joystick, other control interface or positioning accessory E1028
DME-Wheelchairs · category DD021N
1 supplier12 claims12 services$13.62 avg. paid by Medicare
Manual adult size wheelchair, includes tilt in space E1161
DME-Wheelchairs · category DD000N
1 supplier12 claims12 services$165.63 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. KYLE CORSO MORK PHARMD, MBA
Pharmacist (Ambulatory Care)
840 S WOOD ST
CHICAGO, IL 60612
Cook County (312) 996-6783
DR. ALEXANDER SALIM GEHA MD
Surgery
840 S WOOD ST, SUITE 417 CSB
CHICAGO, IL 60612
Cook County (312) 996-5402
DR. KAREN STEINMETZ PATER PHARMD, BCPS, CDE
Pharmacist (Pharmacotherapy)
840 S WOOD ST, SUITE 163, CSB
CHICAGO, IL 60612
Cook County (312) 996-0870
MISS SHIYUN KIM PHARMD
Pharmacist (Pharmacotherapy)
840 S WOOD ST, SUITE 163 CLINICAL SCIENCES BUILDING
CHICAGO, IL 60612
Cook County (312) 996-5025
OANA CRISTINA DANCIU M.D.
Internal Medicine (Hematology & Oncology)
840 S WOOD ST, MC-713
CHICAGO, IL 60612
Cook County (312) 996-1581
DR. MARY BIGLIN MD
Internal Medicine (Gastroenterology)
840 S WOOD ST
CHICAGO, IL 60612
Cook County (312) 996-6651
ALICIA CHANG COJULUN MD
Student in an Organized Health Care Education/Training Program
840 S WOOD ST, MC 856
CHICAGO, IL 60612
Cook County (708) 691-0426
ABDUL KHAYYAM MOHAMMED MD
Pathology (Anatomic Pathology)
840 S WOOD ST
CHICAGO, IL 60612
Cook County (331) 300-9864

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Sarah Messmer's NPI number?

The NPI number for Sarah Messmer is 1073926929. It was assigned to this individual provider in the NPPES registry on June 9, 2014.

Where is Sarah Messmer located?

Sarah Messmer practices at 840 S Wood St Room 440 Clinical Sciences North Building, Chicago, IL 60612. The listed phone number is (312) 996-4242.

What is Sarah Messmer's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Sarah Messmer enrolled in Medicare?

Yes. Sarah Messmer is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Sarah Messmer was last updated on October 31, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.