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IRENA ZALEWSKA MD
NPI 1407846751
Internal Medicine - Gastroenterology in St Clair Shores, MI

Active since October 27, 2005PECOS EnrolledAccepts Medicare Assignment
75/100
CMS Quality Rating
28963 LITTLE MACK AVE, GI MEDICINE ASSOCIATES PC SUITE 101, ST CLAIR SHORES, MI 48081(586) 447-0700(586) 498-0707 Get Directions Write a Review

NPPES record last updated: June 29, 2010. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Irena Zalewska Md NPPES

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

IRENA ZALEWSKA MD (NPI 1407846751) is an individual gastroenterology provider in St Clair Shores, Michigan, licensed in Michigan (4301072116) and active in the NPI registry since October 2005. She is enrolled in Medicare PECOS, is affiliated with Henry Ford Macomb Hospital, and is a graduate of Wayne State University School Of Medicine (1998).

NPPES Registry Identity

NPI1407846751
Entity TypeIndividualFemale
Primary Taxonomy207RG0100X
Provider Legal NameIRENA ZALEWSKACredential: MD
Location Address28963 LITTLE MACK AVE, GI MEDICINE ASSOCIATES PC SUITE 101St Clair Shores, MI 48081-3015
Mailing Address28963 Little Mack Ave, Gi Medicine Associates Pc Suite 101St Clair Shores, MI 48081-3015 · (586) 447-0700 · Fax (586) 498-0707
Phone(586) 447-0700
Fax(586) 498-0707
Sole ProprietorNo
Medical School CMSWayne State University School Of MedicineGraduated 1998
Enumeration DateOctober 27, 2005
Last NPPES UpdateJune 29, 2010
✔ NPI 1407846751 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code207RG0100X
License✔ Licensed in MI · 4301072116
Definition
An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.
28963 LITTLE MACK AVE, St Clair Shores, MI 48081
Open in Google Maps ↗

Other Identifiers 5

Other7718567Aetna
Medicaid459576110MI
Medicare UPINI05822
Other6968970Cigna
Medicare PINOM49130MI

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Buckeye Health Plan, Ambetter from Meridian, Ambetter Health and more.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

Irena Zalewska 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 ID9638154701
PECOS Enrollment IDI20040622001358
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 Reassignment

Medicare enrollment records show Irena Zalewska reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Henry Ford Health System
13 mi
Plastic Surgery
2799 W GRAND BLVD
Detroit, MI 48202
  • Reassigned Medicare billing, Michigan enrollment
  • 1,886 clinicians in this Medicare group
NPI 1528142858 (313) 916-2600

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 9

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.

Pathology examination of tissue using a microscope, intermediate complexity 88305
A pathology examination of tissue with intermediate complexity involves studying a small sample of your body tissue under a microscope. This helps in identifying any abnormal cells or signs of disease. It's a detailed process requiring expert analysis to ensure accurate results.
312 services130 patients
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.
139 services109 patients
Removal of polyps or growths of large bowel using an endoscope with mechanical snare 45385
This procedure involves using a thin, flexible tube called an endoscope to examine the large bowel. If any abnormal growths or polyps are found, a tool called a mechanical snare is used to remove them. This is a common method to prevent potential health issues.
92 services92 patients
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43239
This procedure involves using a thin, flexible tube with a light and camera, known as an endoscope, to examine the esophagus, stomach, and upper part of the small intestine. Small tissue samples are taken for further examination to help diagnose various conditions.
72 services71 patients
Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes 99231
Follow-up hospital inpatient care is a daily service where a healthcare professional checks on your health progress during your hospital stay. Each session typically lasts 15 minutes, involving updates on your condition and adjustments to your treatment plan, if necessary.
68 services40 patients
Biopsy of large bowel using a flexible endoscope 45380
A biopsy of the large bowel using a flexible endoscope is a procedure where a thin, flexible tube with a camera is inserted through the rectum to examine the bowel. If abnormal tissue is found, a small sample is taken for further examination. This helps in diagnosing conditions like inflammation, polyps, or cancer.
41 services41 patients

Hospital Affiliations CMS Care Compare 3

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

Henry Ford Macomb Hospital

Acute Care Hospitals · Clinton Township, MI
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number230047
Location15855 Nineteen Mile RdClinton Township, MI 48038 · Macomb County
Emergency services Birthing friendly

Henry Ford Health Hospital

Acute Care Hospitals · Detroit, MI
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number230053
Location2799 W Grand BlvdDetroit, MI 48202 · Wayne County
Emergency services Birthing friendly

Henry Ford Health West Bloomfield Hospital

Acute Care Hospitals · West Bloomfield, MI
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number230302
Location6777 West Maple RoadWest Bloomfield, MI 48322 · Oakland County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 48081 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
$134.28 typical visit price
range $58.04 – $177.36
Typical copayment $33.57 (range $14.51 – $44.34)
Most-billed visit code 99204
Established Patient
$102.35 typical visit price
range $18.32 – $143.49
Typical copayment $25.58 (range $4.58 – $35.87)
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.

75/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice

Reported Quality Measures

Care Plan
Percentage of patients aged 65 years and older who have an advance care plan or surrogate decision maker documented in the medical record that an advance care plan was discussed but the patient did not wish or was not able to name a surrogate decision maker…
28%220 patients2/55-star benchmark: 100%
Documentation of Current Medications in the Medical Record
Percentage of visits for patients aged 18 years and older for which the eligible professional or eligible clinician attests to documenting a list of current medications using all immediate resources available on the date of the encounter.
100%810 patients5/55-star benchmark: 100%
e-Prescribing
At least one permissible prescription written by the MIPS eligible clinician is queried for a drug formulary and transmitted electronically using certified EHR technology.
75%541 patients3/55-star benchmark: 100%
Medication Reconciliation
The MIPS eligible clinician performs medication reconciliation for at least one transition of care in which the patient is transitioned into the care of the MIPS eligible clinician.
99%176 patients4/55-star benchmark: 100%
Preventive Care and Screening: Tobacco Use: Screening and Cessation Intervention
Percentage of patients aged 18 years and older who were screened for tobacco use one or more times within 24 months AND who received tobacco cessation intervention if identified as a tobacco user
20%20 patients1/55-star benchmark: 100%
Provide Patient Access
At least one patient seen by the MIPS eligible clinician during the performance period is provided timely access to view online, download, and transmit to a third party their health information subject to the MIPS eligible clinician's discretion to withhold…
99%173 patients4/55-star benchmark: 100%
Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

Other Providers at the Same Location NPPES 13

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

SUDHANSHU PATEL MD
Internal Medicine (Gastroenterology)
28963 LITTLE MACK AVE, SUITE 101
ST CLAIR SHORES, MI 48081
Macomb County (586) 447-0700
KIANNA MICHELLE LYONS NP
Nurse Practitioner (Acute Care)
28963 LITTLE MACK AVE, 101
SAINT CLAIR SHORES, MI 48081
Macomb County (586) 447-0700
GI MEDICAL ASSOC PC
Internal Medicine (Gastroenterology)
28963 LITTLE MACK AVE, SUITE 101
SAINT CLAIR SHORES, MI 48081
Macomb County (586) 447-0700
EASTSIDE GROUP LLC
Anesthesiology
28963 LITTLE MACK AVE, SUITE 103
SAINT CLAIR SHORES, MI 48081
Macomb County (586) 447-5110
EASTSIDE ASSOCIATES, LLC
Clinic/Center (Endoscopy)
28963 LITTLE MACK AVE, SUITE 103
ST CLAIR SHORES, MI 48081
Macomb County (586) 447-5110
KETAN G RANA MD
Internal Medicine (Gastroenterology)
28963 LITTLE MACK AVE, GI MEDICINE ASSOCIATES PC SUITE 101
ST CLAIR SHORES, MI 48081
Macomb County (586) 447-0700
VALIYA V RAVI MD
Internal Medicine (Gastroenterology)
28963 LITTLE MACK AVE, GI MEDICINE ASSOCIATES PC
ST CLAIR SHORES, MI 48081
Macomb County (586) 447-0700
VASILIOS POZIOS MD
Internal Medicine (Gastroenterology)
28963 LITTLE MACK AVE, GI MEDICINE ASSOCIATES PC SUITE 101
ST CLAIR SHORES, MI 48081
Macomb County (586) 447-0700

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 Zalewska's NPI number?

The NPI number for Irena Zalewska is 1407846751. It was assigned to this individual provider in the NPPES registry on October 27, 2005.

Where is Irena Zalewska located?

Irena Zalewska practices at 28963 Little Mack Ave Gi Medicine Associates PC Suite 101, St Clair Shores, MI 48081. The listed phone number is (586) 447-0700.

What is Irena Zalewska's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is Irena Zalewska enrolled in Medicare?

Yes. Irena Zalewska 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 organization bills Medicare for Irena Zalewska's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Irena Zalewska reassigns Medicare benefits to Henry Ford Health System (Detroit, MI). The 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 Zalewska's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Irena Zalewska accept?

Health plans from Ambetter Health, Ambetter from Buckeye Health Plan, Ambetter from Meridian, Blue Care Network of Michigan and Blue Cross Blue Shield of Michigan Mutual Insurance Company and 1 other insurer list Irena Zalewska 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 Zalewska affiliated with any hospitals?

According to CMS data, Irena Zalewska is affiliated with Henry Ford Macomb Hospital, Henry Ford Health Hospital and Henry Ford Health West Bloomfield Hospital.

When was this NPI record last updated?

The NPPES record for Irena Zalewska was last updated on June 29, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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.