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DR. SARA JESSICA KEILER MD
NPI 1578618286
Internal Medicine - Infectious Disease in Chicago, IL

Active since January 24, 2007PECOS EnrolledAccepts Medicare Assignment
2740 W FOSTER AVE STE 401, CHICAGO, IL 60625(773) 907-3400(773) 907-0341 Get Directions Write a Review

NPPES record last updated: October 29, 2018. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Oct 29, 2018, Oct 17, 2017 (2 updates tracked since 2017).

About Dr. Sara Jessica Keiler Md NPPES

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

DR. SARA JESSICA KEILER MD (NPI 1578618286) is an individual infectious disease provider in Chicago, Illinois, licensed in Illinois (036.144659) and active in the NPI registry since January 2007. She is enrolled in Medicare PECOS, is affiliated with Northwestern Lake Forest Hospital, and is a graduate of University Of South Florida College Of Medicine (2004).

NPPES Registry Identity

NPI1578618286
Entity TypeIndividualFemale
Primary Taxonomy207RI0200X
Provider Legal NameDR. SARA JESSICA KEILERCredential: MD
Location Address2740 W FOSTER AVE STE 401Chicago, IL 60625-3591
Mailing Address2740 W Foster Ave Ste 401Chicago, IL 60625-3591 · (773) 907-3400 · Fax (773) 907-0341
Phone(773) 907-3400
Fax(773) 907-0341
Sole ProprietorNo
Medical School CMSUniversity Of South Florida College Of MedicineGraduated 2004
Enumeration DateJanuary 24, 2007
Last NPPES UpdateOctober 29, 20182 updates tracked since enumeration
✔ NPI 1578618286 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Infectious DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RI0200X
Licenses✔ Licensed in IL · 036.144659✔ Licensed in OH · 35099974✔ Licensed in IN · 01079261A
Definition
An internist who deals with infectious diseases of all types and in all organ systems. Conditions requiring selective use of antibiotics call for this special skill. This physician often diagnoses and treats AIDS patients and patients with fevers which have not been explained. Infectious disease specialists may also have expertise in preventive medicine and travel medicine.
Also ListedInternal MedicineTaxonomy 207R00000X · License A95566 (CA)
2740 W FOSTER AVE STE 401, Chicago, IL 60625
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Other Names 1

Former Name (1)Sara Jessica Becker M.d.

Other Identifiers 1

Medicaid0103068OH

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter Health, Ambetter Health of Delaware.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Sara Jessica Keiler Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID9133342496
PECOS Enrollment IDI20180522001559
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.

Medicare Billing Reassignments

2

Medicare enrollment records show Sara Keiler reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Infectious Disease Consultants, Ltd.
Same address
Infectious Disease
2740 W FOSTER AVE, SUITE 214
Chicago, IL 60625
  • Reassigned Medicare billing, Illinois enrollment
  • 8 clinicians in this Medicare group
NPI 1447305313 (773) 907-3400
Osf Multi-Specialty Group
131 mi
Internal Medicine
8600 N STATE ROUTE 91
Peoria, IL 61615
  • Reassigned Medicare billing, Illinois enrollment
  • 2,944 clinicians in this Medicare group
NPI 1154908929 (309) 683-5050

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 2

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233
Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.
86 services43 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
20 services13 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Northwestern Lake Forest Hospital

Acute Care Hospitals · Lake Forest, IL
5/5 CMS rating
OwnershipVoluntary non-profit - Other
CMS Certification Number140130
Location1000 N Westmoreland RoadLake Forest, IL 60045 · Lake County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60625 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.

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 Sara Keiler's NPI number?

The NPI number for Sara Keiler is 1578618286. It was assigned to this individual provider in the NPPES registry on January 24, 2007. The provider is also known as Sara Jessica Becker M.D..

Where is Sara Keiler located?

Sara Keiler practices at 2740 W Foster Ave Ste 401, Chicago, IL 60625. The listed phone number is (773) 907-3400.

What is Sara Keiler's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Infectious Disease, with taxonomy code 207RI0200X.

Is Sara Keiler enrolled in Medicare?

Yes. Sara Keiler is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Sara Keiler's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Sara Keiler reassigns Medicare benefits to 2 organizations: Infectious Disease Consultants, Ltd. (Chicago, IL) and Osf Multi-Specialty Group (Peoria, IL). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Sara Keiler's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Sara Keiler accept?

Health plans from Ambetter Health and Ambetter Health of Delaware list Sara Keiler as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Sara Keiler affiliated with any hospitals?

According to CMS data, Sara Keiler is affiliated with Northwestern Lake Forest Hospital.

When was this NPI record last updated?

The NPPES record for Sara Keiler was last updated on October 29, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 years 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.