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JANIS WIENER MD
NPI 1750315586
Internal Medicine in Oak Park, IL

Active since July 10, 2006PECOS EnrolledAccepts Medicare Assignment
965 LAKE ST, OAK PARK, IL 60301(708) 386-3000 Get Directions Write a Review

NPPES record last updated: May 5, 2021. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: May 5, 2021, Aug 26, 2019 (2 updates tracked since 2019).

About Janis Wiener Md NPPES

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

JANIS WIENER MD (NPI 1750315586) is an individual internal medicine provider in Oak Park, Illinois, licensed in Illinois (036-081282) and active in the NPI registry since July 2006. She is enrolled in Medicare PECOS, is affiliated with Loyola Gottlieb Memorial Hospital, and is a graduate of University Of Rochester School Of Medicine And Dentistry (1987).

NPPES Registry Identity

NPI1750315586
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameJANIS WIENERCredential: MD
Location Address965 LAKE STOak Park, IL 60301-1292
Mailing Address2368 Paysphere CirChicago, IL 60674-2368
Phone(708) 386-3000
Sole ProprietorNo
Medical School CMSUniversity Of Rochester School Of Medicine And DentistryGraduated 1987
Enumeration DateJuly 10, 2006
Last NPPES UpdateMay 5, 20212 updates tracked since enumeration
NPPES CertifiedMay 5, 2021
✔ NPI 1750315586 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in IL · 036-081282
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 · Infectious DiseaseTaxonomy 207RI0200X · License 036081282 (IL)
965 LAKE ST, Oak Park, IL 60301
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Other Identifiers 1

Medicaid036081282IL

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

Janis Wiener 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 ID2567547094
PECOS Enrollment IDI20080308000019
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 Janis Wiener reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Loyola University Medical Center
2.6 mi
General Practice
2160 S 1ST AVE
Maywood, IL 60153
  • Reassigned Medicare billing, Illinois enrollment
  • 1,138 clinicians in this Medicare group
NPI 1336159961 (708) 216-3215
Loyola Medical Group LLC
3.8 mi
General Practice
3249 OAK PARK AVE
Berwyn, IL 60402
  • Reassigned Medicare billing, Illinois enrollment
  • 211 clinicians in this Medicare group
NPI 1376041954 (708) 783-3125

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 8

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.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
400 services205 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
243 services167 patients
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439
An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.
192 services192 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.
108 services29 patients
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222
Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
64 services42 patients
Hospital discharge day management, 30 minutes or less 99238
Hospital discharge day management of 30 minutes or less includes finalizing your treatment, discussing your progress, and planning after-care at home. It ensures you're ready to leave the hospital and continue recovery safely.
53 services40 patients

Hospital Affiliations CMS Care Compare 4

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

Loyola Gottlieb Memorial Hospital

Acute Care Hospitals · Melrose Park, IL
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140008
Location701 West North AveMelrose Park, IL 60160 · Cook County
Emergency services

Macneal Hospital

Acute Care Hospitals · Berwyn, IL
2/5 CMS rating
OwnershipProprietary
CMS Certification Number140054
Location3249 South Oak Park AvenueBerwyn, IL 60402 · Cook County
Emergency services Birthing friendly

Rush University Medical Center

Acute Care Hospitals · Chicago, IL
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140119
Location1653 West Congress ParkwayChicago, IL 60612 · Cook County
Emergency services Birthing friendly

Loyola University Medical Center

Acute Care Hospitals · Maywood, IL
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140276
Location2160 S 1st AvenueMaywood, IL 60153 · Cook County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60301 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.

Referred Medical Equipment & Supplies CMS DME claims 13

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

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253
DME-Other DME · category DE017N
25 suppliers51 claims149 services$5.88 avg. paid by Medicare
Lancets, per box of 100 A4259
DME-Medical/Surgical Supplies · category DA000N
17 suppliers29 claims44 services$1.07 avg. paid by Medicare
Hospital bed, semi-electric (head and foot adjustment), with any type side rails, with mattress E0260
DME-Hospital Beds · category DB000N
2 suppliers12 claims12 services$35.80 avg. paid by Medicare
Portable gaseous oxygen system, rental; includes portable container, regulator, flowmeter, humidifier, cannula or mask, and tubing E0431
DME-Oxygen and Supplies · category DC000N
1 supplier29 claims29 services$14.68 avg. paid by Medicare
Nebulizer, with compressor E0570
DME-Other DME · category DE000N
2 suppliers12 claims12 services$3.25 avg. paid by Medicare
Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate E1390
DME-Oxygen and Supplies · category DC002N
1 supplier35 claims35 services$64.86 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 9

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

STEVE MICHEL MD
Internal Medicine
965 LAKE ST
OAK PARK, IL 60301
Cook County (708) 386-3000
MISS LILY BETH WAWRZON RD, LDN
Dietitian, Registered
965 LAKE ST
OAK PARK, IL 60301
Cook County (708) 902-4522
CONSTANTINE L. POLITIS, D.D.S., P.C.
Dentist (Periodontics)
965 LAKE ST, SUITE 6
OAK PARK, IL 60301
Cook County (708) 386-8600
HUNG DUONG MD
Family Medicine
965 LAKE ST
OAK PARK, IL 60301
Cook County (708) 386-3000
DINA PAVILONIS M.D.
Family Medicine
965 LAKE ST
OAK PARK, IL 60301
Cook County (708) 383-0400
VIRTUMED LLC
Family Medicine
965 LAKE ST
OAK PARK, IL 60301
Cook County (708) 628-2326
NICHOLE ENIX GALINDEZ RODRIGUEZ APN-CNP
Nurse Practitioner
965 LAKE ST
OAK PARK, IL 60301
Cook County (708) 383-0400
DR. NANCY GRYNIEWICZ M.D.
Family Medicine
965 LAKE ST
OAK PARK, IL 60301
Cook County (708) 383-0400

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 Janis Wiener's NPI number?

The NPI number for Janis Wiener is 1750315586. It was assigned to this individual provider in the NPPES registry on July 10, 2006.

Where is Janis Wiener located?

Janis Wiener practices at 965 Lake St, Oak Park, IL 60301. The listed phone number is (708) 386-3000.

What is Janis Wiener's specialty?

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

Is Janis Wiener enrolled in Medicare?

Yes. Janis Wiener 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 Janis Wiener's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Janis Wiener reassigns Medicare benefits to 2 organizations: Loyola University Medical Center (Maywood, IL) and Loyola Medical Group LLC (Berwyn, 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 Janis Wiener's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Janis Wiener affiliated with any hospitals?

According to CMS data, Janis Wiener is affiliated with Loyola Gottlieb Memorial Hospital, Macneal Hospital, Rush University Medical Center and Loyola University Medical Center.

When was this NPI record last updated?

The NPPES record for Janis Wiener was last updated on May 5, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.