RadNet Reports First Quarter Financial Results and Adjusts Upwards 2015 Guidance Ranges Despite more severe weather conditions in the east coast this quarter as compared with last year's first quart

RadNet Reports First Quarter Financial

Results and Adjusts Upwards 2015 Guidance Ranges

California, May 11, 2015 - RadNet, Inc. (NASDAQ: RDNT), a national leader in providing high-quality,

cost-effective, fixed-site outpatient diagnostic imaging services through a network of 267 (inclusive of the eight New York Radiology

Partners facilities recently acquired) owned and/or operated outpatient imaging centers, today reported financial results

for its first quarter of 2015.

Dr. Howard Berger, President and Chief Executive

Officer of RadNet, commented, "Similar to last year's first quarter, we faced severe winter weather conditions in our

northeastern and mid-Atlantic operations. Specifically, we estimate that our EBITDA was impacted by $2.8 million more than last

year's quarter. We were also significantly impacted by investments we made in the first quarter to ready the Company to service

increasing volumes in southern California. These included increased staffing levels in our front office, scheduling and pre-authorization

departments, the installation of a new time and attendance system, the acceleration of the eRAD IT implementation, the completion

of our migration to voice recognition transcription and the construction of several new locations. Although these activities greatly

increased our expenses during the quarter, we believe they were necessary to prepare us for future growth. I expect to see our

expenses normalize relative to our revenue during the remainder of the year."

"We experienced extraordinary procedural

growth in our southern California operations, totaling 17.4% relative to last year's first quarter. Much of this growth resulted

from capitation contracts we signed in the last 4 months, which included the responsibility to service a large population of managed

Medicaid patients. Although these contracts will be extremely valuable to us in the future, we experienced unusually high utilization

of services during the quarter. We believe this is because many of these patients are new to the healthcare delivery system, which

resulted in pent-up demand for imaging. We expect utilization to decrease in the coming months, which will lower our operating

expenses in the future. Furthermore, we expect to receive rate increases from some of our contracted medical groups to compensate

us for the higher than anticipated utilization we experienced," added Dr. Berger.

For the first quarter of 2015, RadNet reported

Revenue of $181.3 million, Adjusted EBITDA(1) of $20.2 million and Net Loss of $4.6 million, respectively. Revenue

increased $12.4 million (or 7.3%), Adjusted EBITDA(1) decreased $7.5 million (or 27.0%) and Net Loss (excluding

the tax adjusted loss from the extinguishment of debt in 2014) increased $3.5 million, respectively, over the first quarter of

2014. Per share Net Loss for the first quarter was $(0.11), compared to a loss in the first quarter

of 2014 of $(0.03) (excluding the tax adjusted loss from the extinguishment of debt in 2014),

based upon a weighted average number of basic and diluted shares outstanding of 42.7 million and 40.0 million for these periods

in 2015 and 2014, respectively. Interest expense decreased $1.8 million relative to the first quarter of 2014, and stock-based

compensation expense increased $2.5 million during the first quarter of 2015.

in the first quarter of 2015 were certain non-cash expenses and non-recurring items including: $3.6 million of non-cash employee

stock compensation expense resulting from the vesting of certain options and restricted stock; $36,000 of severance paid

in connection with headcount reductions related to cost savings initiatives; $38,000 gain on the sale of certain capital equipment;

and $1.3 million of combined non-cash amortization and write-off of Deferred Financing Expense and discount

on issuance and refinance of debt related to financing fees paid as part of our existing credit facilities.

For the first quarter of 2015, as compared

to the prior year's first quarter, MRI volume increased 8.4%, CT volume increased 19.8% and PET/CT volume increased 3.3%.

Overall volume, taking into account routine imaging exams, inclusive of x-ray, ultrasound, mammography and other exams, increased

8.6% over the prior year's first quarter. On a same-center basis, including only those centers which were part of RadNet

for both the first quarters of 2015 and 2014, MRI volume increased 6.1%, CT volume increased 16.9% and PET/CT volume increased

3.0%. Overall same-center volume, taking into account routine imaging exams, inclusive of x-ray, ultrasound, mammography and other

exams, increased 5.5% over the prior year's same quarter.

2015 Guidance Update

RadNet updates the previously announced 2015 fiscal year guidance

Dr. Berger highlighted, "We have updated

our guidance to incorporate both the expected financial contribution of the New York Radiology Partners acquisition and the first

quarter results, which were significantly affected by winter weather conditions and certain investments we made for future growth.

The result is that we have increased our Revenue, Adjusted EBITDA and Free Cash Flow guidance levels for the year."

Dr. Berger added, "The revised expectations

also reflect my confidence that we can meet our original projections for our base business during the remainder of 2015. I'm

happy to report that our April top-line results appear to be strong. In particular, we noted the continuation of robust procedural

volumes in our west coast operations and about 5% same-center procedure growth in our east coast operations relative to March."

Conference Call for Today

Dr. Howard Berger, President and Chief Executive

Officer, and Mark Stolper, Executive Vice President and Chief Financial Officer, will host a conference call to discuss its first

quarter 2015 results on Monday, May 11th, 2015 at 7:30 a.m. Pacific Time (10:30 a.m. Eastern Time).

Conference Call Details:

Date: Monday, May 11, 2015

Time: 10:30 a.m. Eastern Time

Dial In-Number: 888-708-5692

International Dial-In Number: 913-312-1473

It is recommended that participants dial in

approximately 5 to 10 minutes prior to the start of the 10:30 a.m. call. There will also be simultaneous and archived webcasts

available at http://public.viavid.com/index.php?id=1145225 or http://www.radnet.com

under the "Investors" menu section and "News Releases" sub-menu of the website. An archived replay of

the call will also be available and can be accessed by dialing 877-870-5176 from the U.S., or 858-384-5517 for international callers,

and using the passcode 6621088.

Regulation G: GAAP and Non-GAAP Financial

This release contains certain financial information

not reported in accordance with GAAP. The Company uses both GAAP and non-GAAP metrics to measure its financial results. The Company

believes that, in addition to GAAP metrics, these non-GAAP metrics assist the Company in measuring its cash-based performance.

The Company believes this information is useful to investors and other interested parties because it removes unusual and nonrecurring

charges that occur in the affected period and provides a basis for measuring the Company's financial condition against other quarters.

Such information should not be considered as a substitute for any measures calculated in accordance with GAAP, and may not be comparable

to other similarly titled measures of other companies. Non-GAAP financial measures should not be considered in isolation from,

or as a substitute for, financial information prepared in accordance with GAAP. Reconciliation of this information to the most

comparable GAAP measures is included in this release in the tables which follow.

RadNet, Inc. is the leading national provider of freestanding, fixed-site

diagnostic imaging services in the United States based on the number of locations and annual imaging revenue. RadNet has a network

of 267 owned and/or operated outpatient imaging centers. RadNet's core markets include California, Maryland, Delaware, New Jersey,

New York and Rhode Island. Together with affiliated radiologists, and inclusive of full-time and per diem employees and technicians,

RadNet has a total of approximately 6,300 employees. For more information, visit http://www.radnet.com.

This press release contains forward-looking

statements within the meaning of the U.S. Private Securities Litigation Reform Act of 1995. Specifically, statements concerning

successfully integrating acquired operations, successfully achieving 2015 financial guidance, successfully developing and integrating

new lines of business, continuing to grow its business by generating patient referrals and contracts with radiology practices,

and receiving third-party reimbursement for diagnostic imaging services, are forward-looking statements within the meaning of the

Safe Harbor. Forward-looking statements are based on management's current, preliminary expectations and are subject to risks and

uncertainties, which may cause the Company's actual results to differ materially from the statements contained herein. Further

information on potential risk factors that could affect RadNet's business and its financial results are detailed in its most recent

Annual Report on Form 10-K, as filed with the Securities and Exchange Commission. Undue reliance should not be placed on forward-looking

statements, especially guidance on future financial performance, which speaks only as of the date they are made. RadNet undertakes

no obligation to update publicly any forward-looking statements to reflect new information, events or circumstances after the date

they were made, or to reflect the occurrence of unanticipated events.

Mark Stolper, 310-445-2800

Executive Vice President and

Chief Financial Officer