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DR. IRENA MULLA M.D.
NPI 1891846911
Internal Medicine - Endocrinology, Diabetes & Metabolism in Chicago, IL

Active since January 16, 2007PECOS EnrolledAccepts Medicare Assignment
4700 N MARINE DR, SUITE 300, CHICAGO, IL 60640(773) 564-5355(773) 564-5359 Get Directions Write a Review

NPPES record last updated: April 6, 2016. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. Irena Mulla M.d. NPPES

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

DR. IRENA MULLA M.D. (NPI 1891846911) is an individual endocrinology, diabetes & metabolism provider in Chicago, Illinois, licensed in Illinois (036118635) and active in the NPI registry since January 2007. She is enrolled in Medicare PECOS, is affiliated with Thorek Memorial Hospital, and is a graduate of Other (1997).

NPPES Registry Identity

NPI1891846911
Entity TypeIndividualFemale
Primary Taxonomy207RE0101X
Provider Legal NameDR. IRENA MULLACredential: M.D.
Location Address4700 N MARINE DR, SUITE 300Chicago, IL 60640-7972
Mailing Address4700 N Marine Dr, Suite 300Chicago, IL 60640-7972 · (773) 564-5355 · Fax (773) 564-5359
Phone(773) 564-5355
Fax(773) 564-5359
Sole ProprietorNo
Medical School CMSOtherGraduated 1997
Enumeration DateJanuary 16, 2007
Last NPPES UpdateApril 6, 2016
✔ NPI 1891846911 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Endocrinology, Diabetes & MetabolismAllopathic & Osteopathic Physicians
Taxonomy Code207RE0101X
License✔ Licensed in IL · 036118635
Definition
An internist who concentrates on disorders of the internal (endocrine) glands such as the thyroid and adrenal glands. This specialist also deals with disorders such as diabetes, metabolic and nutritional disorders, obesity, pituitary diseases and menstrual and sexual problems.
4700 N MARINE DR, Chicago, IL 60640
Open in Google Maps ↗

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. Irena Mulla M.d. 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 ID9638224926
PECOS Enrollment IDI20090910000432
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 Irena Mulla reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Thorek Memorial Hospital
0.9 mi
General Acute Care Hospital
850 W IRVING PARK RD
Chicago, IL 60613
  • Reassigned Medicare billing, Illinois enrollment
  • 61 clinicians in this Medicare group
NPI 1982643961 (773) 525-6780
Humboldt Park Health
5.3 mi
Family Medicine
1044 N FRANCISCO AVE
Chicago, IL 60622
  • Reassigned Medicare billing, Illinois enrollment
  • 154 clinicians in this Medicare group
NPI 1740417153 (773) 292-8200

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 3

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.
142 services50 patients
Telephone medical discussion with physician, 11-20 minutes 99442
This is a service where you have a phone conversation with your doctor for 11-20 minutes. It's used for discussing health concerns, reviewing test results, or managing ongoing conditions. It's a convenient way to receive medical advice without an in-person visit.
17 services13 patients
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204
This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.
14 services14 patients

Hospital Affiliations CMS Care Compare 2

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

Thorek Memorial Hospital

Acute Care Hospitals · Chicago, IL
OwnershipVoluntary non-profit - Private
CMS Certification Number140115
Location850 W Irving Park RdChicago, IL 60613 · Cook County
Emergency services

Humboldt Park Health

Acute Care Hospitals · Chicago, IL
1/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140206
Location1044 N Francisco AveChicago, IL 60622 · Cook County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60640 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 2

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
8 suppliers18 claims77 services$6.83 avg. paid by Medicare
Supply allowance for therapeutic continuous glucose monitor (cgm), includes all supplies and accessories, 1 month supply = 1 unit of service K0553
DME-Other DME · category DE017N
5 suppliers32 claims32 services$190.94 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 3

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

FAYCOR N A INC
Clinic/Center (Ambulatory Surgical)
4700 N MARINE DR, 5TH FLOOR
CHICAGO, IL 60640
Cook County (847) 291-9058
MAY HASHIMI M.D.
Internal Medicine (Hematology & Oncology)
4700 N MARINE DR, SUITE 315
CHICAGO, IL 60640
Cook County (773) 564-5030
CYNTHIA KAY ROZIER M.D.
Internal Medicine
4700 N MARINE DR, SUITE 300
CHICAGO, IL 60640
Cook County (773) 564-5355

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 Irena Mulla's NPI number?

The NPI number for Irena Mulla is 1891846911. It was assigned to this individual provider in the NPPES registry on January 16, 2007.

Where is Irena Mulla located?

Irena Mulla practices at 4700 N Marine Dr Suite 300, Chicago, IL 60640. The listed phone number is (773) 564-5355.

What is Irena Mulla's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.

Is Irena Mulla enrolled in Medicare?

Yes. Irena Mulla 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 Irena Mulla's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Irena Mulla reassigns Medicare benefits to 2 organizations: Thorek Memorial Hospital (Chicago, IL) and Humboldt Park Health (Chicago, 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 Irena Mulla's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Irena Mulla accept?

Health plans from Ambetter Health and Ambetter Health of Delaware list Irena Mulla 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 Irena Mulla affiliated with any hospitals?

According to CMS data, Irena Mulla is affiliated with Thorek Memorial Hospital and Humboldt Park Health.

When was this NPI record last updated?

The NPPES record for Irena Mulla was last updated on April 6, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.