AMERICAN SHARED HOSPITAL SERVICES REPORTS 2016 FIRST QUARTER RESULTS San Francisco, CA

AMERICAN SHARED HOSPITAL SERVICES

REPORTS 2016 FIRST QUARTER RESULTS

San Francisco, CA - May 10,

2016 -- AMERICAN SHARED HOSPITAL SERVICES (NYSE MKT:AMS), a leading provider of turnkey technology solutions for advanced

radiosurgical and radiation therapy services, today announced financial results for the first quarter of 2016.

First Quarter Results

For the three months ended March 31, 2016,

medical services revenue increased 2.9% to $4,238,000 compared to medical services revenue of $4,117,000 for the first quarter

of 2015. Excluding one customer contract that expired after the first quarter of 2015, medical services revenue increased $374,000,

Net income for the first quarter of 2016

of $51,000, or $0.01 per share, included a loss on the early extinguishment of debt of $108,000 related to the payoff during the

quarter of a $1,000,000 promissory note due in October 2017. Excluding this non-cash loss, net of estimated income tax, net income

for the first quarter of 2016 was $115,000 compared to net income for the first quarter of 2015 of $128,000, or $0.02 per share.

customer contract that expired after the first quarter of 2015, the total number of procedures performed in AMS' Gamma Knife business

increased 6.2% for the first quarter of 2016 compared to the same period of 2015.

Medical services gross margin for the first

quarter of 2016 increased to 40.9%, compared to medical services gross margin of 38.8% for the first quarter of 2015, primarily

the result of reduced maintenance costs.

Operating income increased 9.4% to $499,000

for the first quarter of 2016 compared to operating income of $456,000 for the same period a year earlier. Pre-tax income, net

of income attributable to non-controlling interest and the loss on early extinguishment of debt, decreased to $223,000 for the

first quarter of 2016, compared to pre-tax income, net of income attributable to non-controlling interest, of $258,000 for the

first quarter of 2015.

Selling and administrative expenses for

the first quarter of 2016 increased to $949,000 compared to selling and administrative expenses of $821,000 for the first quarter

of 2015, primarily the result of higher accounting and consulting expenses.

Adjusted EBITDA, a non-GAAP financial measure,

was $2,129,000 for the first quarter of 2016, compared to $2,119,000

for the first quarter of 2015. Please refer to the financial statements included with this press release for a reconciliation of

GAAP to this non-GAAP financial measure.

Balance Sheet Highlights

At March 31, 2016, cash and cash equivalents

were $2,190,000 compared to $2,259,000 at December 31, 2015. Shareholders' equity at March 31, 2016 was $25,481,000, or $4.75 per

outstanding share. This compares to shareholders' equity at December 31, 2015 of $25,180,000, or $4.69 per outstanding share.

Chairman and Chief Executive Officer Ernest

A. Bates, M.D., said, "Our Gamma Knife business performed well in the first quarter, continuing the trend of year-over-year

gains in treatment volume, revenue, gross margin and operating income the business has delivered consistently in recent quarters.

We remain focused on improving operating margins, and working with our hospital partners to increase utilization of our Gamma Knife

"Early in April we were pleased to

announce the initiation of patient treatments at AMS' first proton therapy center, The Marjorie and Leonard Williams Center for

Proton Therapy at UF Health Cancer Center-Orlando Health in Florida. We expect our new proton business to contribute modestly to

revenue in the second quarter and more substantially in the year's second half as UF Health Cancer Center-Orlando Health moves

up the learning curve with the MEVION S250 proton device we supplied. The steady accumulation of professional research and clinical

experience with this advanced treatment modality underscores the advantages of protons over conventional X-rays in the treatment

of a wide range of cancers. We believe we have entered a period of sustained growth in the development of proton centers at hospitals

throughout the county, and the successful development and opening of UF Health Cancer Center-Orlando Health positions AMS to be

a significant beneficiary."

Earnings Conference Call

American Shared has scheduled a conference

call at 12:00 p.m. PDT (3:00 p.m. EDT) today. To participate in the live call, dial (800) 446-1671 at least 5 minutes prior to

the scheduled start time, and mention confirmation number 42509287. A simultaneous WebCast of the call may be accessed through

the Company's website, www.ashs.com, or www.streetevents.com (institutional investors). A replay will be available

for 30 days at these same internet addresses, or by dialing 888-843-7419 and entering 42509287# when prompted.

American Shared Hospital Services provides

turnkey technology solutions for advanced radiosurgical and radiation therapy services. AMS is the world leader in providing Gamma

Knife radiosurgery equipment, a non-invasive treatment for malignant and benign brain tumors, vascular malformations and trigeminal

neuralgia (facial pain). The Company also offers proton therapy, the latest IGRT and IMRT systems, as well as its proprietary Operating

Room for the 21st CenturySM concept. AMS owns a common stock investment in Mevion Medical Systems, Inc., developer of

the compact MEVION S250 Proton Therapy System.

Safe Harbor Statement

This press release may be deemed to

contain certain forward-looking statements with respect to the financial condition, results of operations and future plans of American

Shared Hospital Services, which involve risks and uncertainties including, but not limited to, the risks of the Gamma Knife and

radiation therapy businesses, the risks of developing The Operating Room for the 21st Century program, the risks of investing in

Mevion Medical Systems, Inc., and the risks of the timing, financing, and operations of the Company's proton therapy business.

Further information on potential factors that could affect the financial condition, results of operations and future plans of American

Shared Hospital Services is included in the filings of the Company with the Securities and Exchange Commission, including the Company's

Annual Report on Form 10-K for the year ended December 31, 2015, and the definitive Proxy Statement for the Annual Meeting of Shareholders

to be held on June 21, 2016.

Non-GAAP Financial Measure

Adjusted EBITDA, the non-GAAP measure presented

in this press release and supplementary information, is not a measure of performance under accounting principles generally accepted

in the United States ("GAAP"). Adjusted EBITDA should not be considered a substitute for, and investors should also consider,

income from operations, net earnings, earnings per share and other measures of performance as defined by GAAP as indicators of

the Company's performance or profitability.

Ernest A. Bates, M.D.,

Chairman and Chief Executive

Neil Berkman, (310) 477-3118