GREGORY STACY
NPI 1952452922
Radiology - Diagnostic Radiology in Chicago, IL

Q: What is Gregory Stacy's NPI number?

The NPI number for Gregory Stacy is 1952452922. It was assigned to this individual provider in the NPPES registry on January 16, 2007.

Q: What is Gregory Stacy's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.

Q: When was this NPI record last updated?

The NPPES record for Gregory Stacy was last updated on February 6, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.

Active since January 16, 2007PECOS EnrolledAccepts Medicare Assignment

97.71/100

CMS Quality Rating

5841 S MARYLAND AVE, CHICAGO, IL 60637(888) 824-0200 Get Directions Write a Review

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

Record update history: Feb 6, 2026, Oct 24, 2022, May 19, 2022 and 2 more (5 updates tracked since 2022).

On this page

About Gregory Stacy NPPES

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

GREGORY STACY (NPI 1952452922) is an individual diagnostic radiology provider in Chicago, Illinois, licensed in Illinois (036097140) and active in the NPI registry since January 2007. He is enrolled in Medicare PECOS, is affiliated with The University Of Chicago Medical Center, and maintains a secondary practice location in Crown Point.

NPPES Registry Identity

NPI1952452922

Entity TypeIndividualMale

Primary Taxonomy2085R0202X

Provider Legal NameGREGORY STACY

Location Address5841 S MARYLAND AVEChicago, IL 60637-1443

Mailing Address150 Harvester Dr, Suite 300Burr Ridge, IL 60527-5919

Phone(888) 824-0200

Sole ProprietorNo

Medical School CMSWashington University School Of MedicineGraduated 1995

Enumeration DateJanuary 16, 2007

Last NPPES UpdateFebruary 6, 20265 updates tracked since enumeration

NPPES CertifiedFebruary 6, 2026

✔ NPI 1952452922 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyRadiology · Diagnostic RadiologyAllopathic & Osteopathic Physicians

Taxonomy Code2085R0202X

Licenses✔ Licensed in IL · 036097140✔ Licensed in IN · 01091572A

Definition

A radiologist who utilizes x-ray, radionuclides, ultrasound and electromagnetic radiation to diagnose and treat disease.

5841 S MARYLAND AVE, Chicago, IL 60637

Open in Google Maps ↗

Secondary Practice Location 1

Location 110855 Virginia StCrown Point, IN 46307-0210 · Phone (888) 824-0200

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Oscar Health.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

Gregory Stacy 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 ID4082807292

PECOS Enrollment IDI20101020001016, I20260212000989

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 Gregory Stacy reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

University Of Chicago

Same address

Multi-Specialty

5841 S MARYLAND AVE, UCPG/MC 1099
Chicago, IL 60637

Reassigned Medicare billing, Illinois and Indiana enrollments
Also billed through NPI 1477262046 (Illinois)
2,237 clinicians in this Medicare group

NPI 1821048786 (773) 702-9200

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 53

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.

X-ray of hip, 2-3 views 73502

An X-ray of the hip with 2-3 views is a non-invasive imaging test. It uses a small amount of radiation to produce pictures of the hip joint. These images help in diagnosing conditions like fractures, arthritis, or other abnormalities. The process is quick and painless.

169 services155 patients

X-ray of shoulder, minimum of 2 views 73030

An X-ray of the shoulder, with a minimum of 2 views, is a non-invasive imaging test. It uses a small amount of radiation to produce images of your shoulder bones. This helps in diagnosing conditions like fractures, arthritis, or other abnormalities. The procedure is quick and painless.

142 services127 patients

X-ray of hand, minimum of 3 views 73130

An X-ray of the hand, minimum of 3 views, is a non-invasive imaging test. It uses a small amount of radiation to produce images of the bones in your hand from different angles. This helps in diagnosing fractures, infections, arthritis, or other abnormalities. It's quick and painless.

135 services97 patients

X-ray of foot, minimum of 3 views 73630

An X-ray of the foot, minimum of 3 views, is a non-invasive imaging test. It uses a small amount of radiation to produce images of the bones and tissues in your foot. This helps to identify fractures, infections, or other abnormalities. Multiple views ensure a comprehensive examination.

129 services94 patients

X-ray of knee, 3 views 73562

An X-ray of the knee, 3 views, is a non-invasive imaging test. It uses a small amount of radiation to produce images of the knee from three different angles. This helps medical professionals to diagnose and monitor conditions like arthritis, fractures, or infections. The process is quick and painless.

122 services103 patients

X-ray of knee, 4 or more views 73564

An X-ray of the knee, 4 or more views, is a non-invasive imaging test. It involves capturing multiple images of your knee from different angles. This helps in diagnosing conditions such as fractures, arthritis, or infections. The procedure is quick and painless.

105 services90 patients

X-ray of knee, 1-2 views 73560

An X-ray of the knee with 1-2 views is a quick, painless test that produces images of the knee bones. It helps identify fractures, infections, or changes in the knee joint. During the procedure, you'll be asked to stay still while the X-ray machine captures the images.

102 services85 patients

X-ray of hip, 2-3 views 73502

95 services93 patients

X-ray of shoulder, minimum of 2 views 73030

94 services83 patients

X-ray of hand, minimum of 3 views 73130

93 services68 patients

X-ray of knee, 4 or more views 73564

91 services80 patients

X-ray of knee, 3 views 73562

81 services63 patients

X-ray of lower and sacral spine, 2-3 views 72100

An X-ray of the lower and sacral spine involves capturing images of your lower back area, including the tailbone. This procedure helps in identifying problems like fractures, infections, or deformities. 2-3 different angle views provide a comprehensive picture.

78 services75 patients

X-ray of foot, minimum of 3 views 73630

72 services58 patients

X-ray of upper spine, 2-3 views 72040

An X-ray of the upper spine, with 2-3 views, is a painless procedure that employs a small amount of radiation to capture images of your neck and upper back. It assists in diagnosing conditions like arthritis, fractures, or spinal deformities.

66 services58 patients

X-ray of lower leg, 2 views 73590

An X-ray of the lower leg, 2 views, is a quick, painless test that produces images of the bones in your lower leg. It helps to identify fractures, infections, or diseases. Two different angles are used to provide a comprehensive view of the leg's structure.

65 services59 patients

X-ray of ankle, minimum of 3 views 73610

An ankle X-ray is a quick, painless imaging test. It involves capturing at least three different images or 'views' of your ankle using small amounts of radiation. These images help identify any abnormalities or injuries, such as fractures or arthritis.

60 services56 patients

X-ray of lower and sacral spine, 2-3 views 72100

53 services53 patients

X-ray of thigh bone, minimum 2 views 73552

An X-ray of the thigh bone is a non-invasive imaging test. It involves passing a small amount of radiation through the thigh to produce images of the bone structure. At least two different angles are captured for a comprehensive view. This helps detect fractures, infections, or other abnormalities.

52 services46 patients

X-ray of wrist, minimum of 3 views 73110

An X-ray of the wrist, minimum of 3 views, is a diagnostic procedure that uses radiation to create images of your wrist from different angles. This helps detect fractures, infections, or other abnormalities for accurate diagnosis and treatment planning.

51 services43 patients

X-ray of pelvis, 1-2 views 72170

An X-ray of the pelvis, 1-2 views, is a quick and painless imaging test. It uses a small amount of radiation to produce images of the lower part of your torso. These images help to detect any abnormalities or injuries in your hip bones and surrounding structures.

49 services46 patients

X-ray of lower and sacral spine, minimum of 4 views 72110

An X-ray of the lower and sacral spine involves capturing images of your lower back and tailbone area. It helps in identifying issues like fractures, arthritis, or other abnormalities. At least four different angles or 'views' are taken to get a comprehensive picture.

43 services43 patients

X-ray of lower and sacral spine, minimum of 4 views 72110

43 services43 patients

X-ray of wrist, minimum of 3 views 73110

41 services30 patients

X-ray of lower jaws, upper jaws and teeth 70355

An X-ray of lower jaws, upper jaws, and teeth is a diagnostic procedure that uses radiation to create images of these areas. This helps in identifying issues like tooth decay, gum problems, or jawbone irregularities. It's a quick, painless process and crucial for maintaining oral health.

30 services30 patients

X-ray of ankle, minimum of 3 views 73610

28 services27 patients

X-ray of forearm, 2 views 73090

An X-ray of the forearm, 2 views, is a diagnostic procedure where two different pictures of your forearm are taken using a small amount of radiation. These images help doctors assess your bone health and identify any fractures, infections, or other abnormalities.

26 services24 patients

X-ray of upper spine, 2-3 views 72040

24 services22 patients

X-ray of upper spine, 4-5 views 72050

An X-ray of the upper spine with 4-5 views is a non-invasive imaging test. It uses radiation to capture detailed images of the bones and structures in your neck and upper back. This procedure helps identify issues like fractures, infections, or deformities.

23 services23 patients

Mri scan of leg before and after contrast 73720

An MRI scan of the leg involves using a magnetic field and radio waves to create detailed images of the structures within your leg. Initially, images are taken without a contrast agent. Then, a contrast agent is injected into your body to enhance the images, highlighting certain areas for closer examination.

23 services20 patients

X-ray for bone length assessment 77073

An X-ray for bone length assessment is a simple, non-invasive imaging test. It helps to evaluate the length of your bones and identify any discrepancies or abnormalities. This procedure is quick, painless, and provides valuable information for your healthcare provider.

23 services23 patients

X-ray of elbow, minimum of 3 views 73080

An elbow X-ray with a minimum of 3 views is a non-invasive imaging test. It helps visualize the bones of the elbow from different angles. This aids in diagnosing conditions like fractures or arthritis. The procedure is quick, painless, and usually takes around 15 minutes.

22 services21 patients

X-ray for bone length assessment 77073

22 services21 patients

X-ray of upper arm, minimum of 2 views 73060

An X-ray of the upper arm with a minimum of 2 views involves capturing images of your arm from different angles. This helps in assessing the bones and surrounding tissues for any abnormalities or injuries. It's a quick, painless procedure.

21 services20 patients

X-ray of ribs on both sides of body, 3 views 71110

An X-ray of ribs on both sides of the body, 3 views, is a diagnostic procedure that uses radiation to capture images of your rib cage. It helps detect fractures, infections, or abnormalities. You'll be positioned in different ways to get three distinct images for a comprehensive assessment.

19 services19 patients

X-ray of middle spine, 2 views 72070

An X-ray of the middle spine, or thoracic spine, involves capturing two different images of the area. This non-invasive procedure uses small amounts of radiation to visualize the bones and tissues in your back, helping to identify any abnormalities or injuries.

19 services17 patients

X-ray of shoulder, 1 view 73020

An X-ray of the shoulder, 1 view, is a quick, painless test that produces images of the bones and tissues within your shoulder. It helps diagnose conditions such as fractures, infections, or arthritis. You'll be positioned to capture the best view, then a small dose of radiation creates the image.

19 services19 patients

X-ray of both hips, minimum of 5 views 73523

An X-ray of both hips with a minimum of 5 views is a non-invasive imaging test. It uses a small amount of radiation to produce images of the hip joints from different angles. This aids in diagnosing conditions such as fractures, arthritis, or other hip abnormalities.

19 services19 patients

X-ray of ribs on both sides of body, 3 views 71110

18 services18 patients

X-ray of pelvis, minimum of 3 views 72190

An X-ray of the pelvis with a minimum of 3 views is a diagnostic procedure that uses radiation to create images of your lower body area. This helps in detecting issues like fractures, arthritis, or other abnormalities. It's quick, non-invasive, and typically painless.

18 services17 patients

Ct scan of leg without contrast 73700

A CT scan of the leg is a non-invasive imaging test that uses X-rays to capture detailed images of your leg's bones, muscles, and blood vessels. It doesn't use contrast dye and doesn't cause any pain. It helps in diagnosing injuries or diseases.

17 services16 patients

X-ray of middle spine, 3 views 72072

An X-ray of the middle spine, with 3 views, is a diagnostic procedure where images are taken from different angles (front, side, and angled) to assess the health of your spine. It helps identify issues like fractures, tumors, or degenerative conditions.

16 services16 patients

Mri scan of arm joint without contrast 73221

An MRI scan of the arm joint is a non-invasive imaging procedure that uses magnetic fields and radio waves to create detailed images of the structures within your arm joint. No contrast dye is used in this process. It helps to diagnose or monitor conditions like arthritis, injuries, or infections.

15 services14 patients

X-ray of entire middle and lower spine, 2-3 views 72082

An X-ray of your middle and lower spine involves capturing images of these areas to identify any abnormalities. The procedure involves taking 2-3 different views for a comprehensive understanding. It's non-invasive and usually painless, helping doctors diagnose conditions like fractures or infections.

14 services14 patients

X-ray of pelvis, 1-2 views 72170

14 services14 patients

X-ray of both hips, minimum of 5 views 73523

13 services13 patients

X-ray of thigh bone, 1 view 73551

An X-ray of the thigh bone, 1 view, is a quick, painless procedure that uses a small amount of radiation to create images of the inside of your thigh. It helps doctors to diagnose and monitor conditions like fractures, infections, or tumors.

13 services12 patients

Ct scan of arm without contrast 73200

A CT scan of the arm without contrast is a non-invasive imaging test. It uses X-ray technology to capture detailed images of your arm's structures. It doesn't involve any contrasting dye, hence, minimal preparation is required. It helps in diagnosing injuries or conditions affecting the arm.

12 services12 patients

X-ray of both hips, 3-4 views 73522

An X-ray of both hips with 3-4 views is a safe imaging procedure. It involves capturing multiple pictures of your hip joints from different angles. This helps in diagnosing conditions like arthritis or fractures. You'll need to stay still during the process for clear images.

12 services12 patients

X-ray of foot, 2 views 73620

An X-ray of the foot, 2 views, is a quick, painless test that produces images of the bones and structures inside your foot. Two different angles are used to provide a comprehensive view. This helps doctors diagnose fractures, infections, or other abnormalities.

12 services11 patients

X-ray of upper spine, 4-5 views 72050

11 services11 patients

X-ray of middle spine, 3 views 72072

11 services11 patients

Mri scan of arm joint without contrast 73221

11 services11 patients

Hospital Affiliations CMS Care Compare 4

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

The University Of Chicago Medical Center

Acute Care Hospitals · Chicago, IL

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number140088

Location5841 South MarylandChicago, IL 60637 · Cook County

Emergency services Birthing friendly

Northwestern Medicine Central Dupage Hospital

Acute Care Hospitals · Winfield, IL

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number140242

Location25 North Winfield RoadWinfield, IL 60190 · Du Page County

Emergency services Birthing friendly

Methodist Hospitals Inc

Acute Care Hospitals · Gary, IN

1/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number150002

Location600 Grant StGary, IN 46402 · Lake County

Emergency services Birthing friendly

St Mary Medical Center Inc

Acute Care Hospitals · Hobart, IN

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number150034

Location1500 S Lake Park AveHobart, IN 46342 · Lake County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60637 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

$94.06 typical visit price

range $60.08 – $183.39

Typical copayment $23.51 (range $15.02 – $45.84)

Most-billed visit code 99203

Established Patient

$74.80 typical visit price

range $18.97 – $148.12

Typical copayment $18.70 (range $4.74 – $37.03)

Most-billed visit code 99213

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.

97.71/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored through an Alternative Payment Model

Quality

75.43

Promoting Interoperability

100

Improvement Activities

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. DON MARTINEZ M.D.

Radiology (Diagnostic Radiology)