MRI + radiologyNPI registry, September 2026

Invisible Sun LLC

117 Saint Francis Cir, Oak Brook, IL 60523

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Practice-location phone (registry)

(312) 242-7066

As recorded by the organisation in NPPES, last updated 8 October 2008. Not verified by us.

Registry Record

NPI: 1649421504
Type: MRI centre and radiology clinic
Taxonomy codes: 261QM1200X (Magnetic Resonance Imaging (MRI) clinic/center); 261QR0200X (Radiology clinic/center); also 261Q00000X
Practice location: 117 Saint Francis Cir, Oak Brook, IL 60523
Telephone: (312) 242-7066
NPI issued: 8 October 2008 (17 years ago)
Record updated: 8 October 2008 (17 years ago)
NPI status: NPI active as reported by CMS 2026-09
Metro area: Chicago-Naperville-Elgin, IL-IN (metropolitan area, DuPage County)
State: Illinois (528 records statewide)
Map position: Census address match (rooftop level)
Snapshot: NPPES data dissemination file, 14 September 2026

What the Record Tells You

Invisible Sun LLC is an NPI registry record for an MRI centre and radiology clinic at 117 Saint Francis Cir in Oak Brook, Illinois 60523. CMS issued NPI 1649421504 on 8 October 2008, and the organisation last updated its own entry on 8 October 2008. That was 17 years ago, so treat the phone number and suite as unverified until you have spoken to someone there.

The record carries 2 imaging taxonomy codes: Magnetic Resonance Imaging (MRI) clinic/center (261QM1200X) and Radiology clinic/center (261QR0200X). The MRI-specific code means the organisation registered itself as a magnetic resonance imaging centre, the strongest signal the registry gives that a scanner is on site. It also holds one other taxonomy code (261Q00000X).

Oak Brook sits in the Chicago-Naperville-Elgin, IL-IN metropolitan area (DuPage County), which has 416 imaging-centre records on the Illinois side in the September 2026 file, 89 of them with the MRI code, out of 528 across Illinois. The nearest alternatives in the registry are Salt Creek Medical Imaging, LLC (0.7 miles, Westmont), Ossp Imaging of Chicago (1.1 miles, Oakbrook Terrace) and Open Advanced MRI of Oak Brook, LLC (1.5 miles, Westmont), with 2 more within 2.1 miles.

For a cash-pay benchmark, our Illinois freestanding-centre estimate is $550 to $1,600 for a typical single-region MRI. At Illinois hospitals the cash price is measured rather than estimated: $254 to $4,532 for a brain MRI, median $1,505, from 47 of the 61 Illinois hospitals whose own price files we have read, out of 114 in the state, files dated to September 2026. This centre's own prices are not in the registry: call (312) 242-7066 with the CPT code for your scan and ask for the self-pay rate, whether the radiologist's report is included, and the scanner's field strength.

Nearest Alternatives

The 5 closest imaging records to 117 Saint Francis Cir, straight-line distance. Rows without a link are name-classified radiology organisations or records outside a metro page.

Centre	City	Distance	Type	Phone (registry)
Salt Creek Medical Imaging, LLC	Westmont, IL	0.7 mi	Radiology clinic	(630) 413-4490
Ossp Imaging of Chicago	Oakbrook Terrace, IL	1.1 mi	Radiology clinic	(678) 752-7246
Open Advanced MRI of Oak Brook, LLC	Westmont, IL	1.5 mi	Radiology org. (name-classified)	(630) 850-8501
Advanced Medical Imaging Center LLC	Oakbrook Terrace, IL	1.6 mi	Radiology org. (name-classified)	(630) 440-7786
Precisionimagingusa	Downers Grove, IL	2.1 mi	Radiology clinic	(630) 344-9449

Where it sits

Invisible Sun LLC in amber, with the 5 nearest registry records in teal. Boundary drawn: DuPage County outline.

Map data: OpenFreeMap, © OpenMapTiles, data from OpenStreetMap contributors. Boundaries: US Census Bureau cartographic boundary files.

Cash-Price Benchmark

Cash price for a brain MRI in Illinois: 47 hospitals measured

Freestanding imaging centre, estimated

$550 to $1,600

Our own estimate. No imaging operator publishes a per-state cash price.

Hospital outpatient, measured

$254 to $4,532

Median $1,505 cash against a median gross charge of $3,962, from 47 of the 61 Illinois hospitals whose own price files we have read, out of 114 in the state, files dated to September 2026.

Chicago academic medical centres (Northwestern, U of C) at the top end. The hospital figures are CPT 70551, brain MRI without contrast, taken from each hospital's own federal transparency file and attributed to the date that file carries. A further 7 hospitals publish a “cash price” that is its chargemaster restated rather than a discount, reaching $7,151; those are kept out of the band above and counted here instead. 3 more hospitals list this code at prices more than three times apart in the same file, from $121 to $551, so which row is the scan cannot be told from the file; they are excluded from the band and counted here. Hospitals whose file we could not read are named, not filled in (methodology).

What to ask when you call

The self-pay price for your exact CPT code (70551 brain, 72148 lumbar spine, 73221 or 73721 joint, without contrast), and whether the radiologist's report is included.
Scanner field strength (1.5T or 3T) and whether it is closed, wide-bore or open.
ACR or IAC accreditation, and who reads the images. The registry cannot tell you either.
Whether they accept an order from a telehealth referral if you have no local doctor.

Full list: cheap MRI, good MRI checklist.

Browse and compare

All 416 centres in Chicago-Naperville-Elgin Illinois imaging centres Questions to ask before booking Cash-pay MRI guide Imaging centre directory

Source: NPI registry records, status as reported by CMS, September 2026 file (NPPES data dissemination file dated 14 September 2026, download.cms.gov; US federal public data, no charge). NPPES is an identifier registry, not a licence register: an NPI does not validate licensure, accreditation or that a scanner is on site. Names, addresses and phones are as self-reported to CMS and many records have not been updated for years; confirm before you travel. Coordinates: US Census Bureau geocoder, ZIP-code centroid where the address did not match (flagged). Metro areas: 2023 Census core-based statistical areas by county. Price ranges: our methodology; hospital cash prices: each hospital's federal transparency file (45 CFR 180), where parsed. No centre pays to be listed and none is endorsed. Listed here in error, or want a correction? Email questions@mriscancost.com. This page describes a registry record, not a review or recommendation of Invisible Sun LLC.