Exhibit 99.1

QUALITY SYSTEMS, INC. REPORTS FISCAL 2015 SECOND QUARTER RESULTS

Revenue Grows Nine Percent, Reaching Record Levels while

Pipeline Expands for Eighth Consecutive Quarter

IRVINE, Calif. … October 23, 2014 …Quality Systems, Inc. (NASDAQ:QSII) announced today results for its fiscal 2015 second quarter ended September 30, 2014.

Revenues for the fiscal 2015 second quarter reached a record $120.5 million, an increase of nine percent when compared with $111.1 million reported in the same period last year. Net income for the 2015 second quarter was $4.8 million versus $10.1 million, a decrease of $5.3 million from the 2014 second quarter.

On a GAAP basis, fully diluted earnings per share was $0.08 in the fiscal 2015 second quarter versus fully diluted earnings per share of $0.17 for the comparable period a year ago. On a non-GAAP basis, fully diluted earnings per share for the fiscal 2015 second quarter was $0.13, a decline from $0.22 reported in the fiscal 2014 second quarter.

During the quarter, the Company’s pipeline grew to $161.8 million, improving for the eighth consecutive quarter. At quarter-end, the Company’s liquidity position was strong, with $123.5 million of cash and investments.

“During the fiscal 2015 second quarter, we saw marked improvement across all fronts within the organization. The significant progress we are making is having a cumulative effect, which is creating positive momentum in our business and our results,” noted Steven T. Plochocki, president and chief executive officer.

“We continue to realize benefits from the initiatives we have put into place over the past year, including the restructuring of our functional organizations, the cross selling of our products and services and the release of new solutions that cater to the evolving healthcare marketplace. Revenue Cycle Management, population health and interoperability are all among the key areas that are impacting the Company’s sales and marketing efforts, in terms of both net new deals as well as cross selling into our growing client base. All of this strengthens our position as we head into the second half of this fiscal year,” added Plochocki.

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Quality Systems

Fiscal 2015 Second Quarter Results

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Quality Systems also announced that its Board of Directors declared a quarterly cash dividend of seventeen and one-half cents ($0.175) per share on the Company’s outstanding shares of common stock, payable to shareholders of record as of December 12, 2014 with an anticipated distribution date of January 2, 2015. The $0.175 per share cash dividend is pursuant to the Company’s current practice to pay a regular quarterly dividend on the Company’s outstanding shares of common stock, subject to Board review and approval, and establishment of record and distribution dates by the Board prior to the declaration and payment of each such quarterly dividend.

Quality Systems will host a conference call to discuss its fiscal 2015 second quarter results on Thursday, October 23, 2014 at 10:00 AM ET (7:00 AM PT). All participants should dial 1-866-900-9499 at least ten minutes prior to the start of the call and reference conference ID #22384931. International callers should dial 1-937-502-2136. To hear a live Web simulcast or to listen to the archived webcast following completion of the call, please visit the Company’s website at www.qsii.com, click on the “Investors” tab, then select “Conference Calls,” to access the link to the call. To listen to a telephone replay of the conference call, please dial 800-585-8367 or 404-537-3406 and enter conference ID #22384931. The replay will be available from approximately 1:00 PM ET on Thursday, October 23, 2014, through 11:59 PM ET on Thursday, October 30, 2014.

A transcript of the conference call will be made available on the Company’s website at www.qsii.com.

About Quality Systems, Inc.

Irvine, Calif.-based Quality Systems, Inc. and its NextGen Healthcare subsidiary develop and market computer-based practice management, electronic health records and revenue cycle management applications as well as connectivity products and services for medical and dental group practices and small hospitals. Visit www.qsii.com and www.nextgen.com for additional information.

SAFE HARBOR PROVISIONS FOR FORWARD-LOOKING STATEMENTS

This news release may contain forward-looking statements within the meaning of the federal securities laws, including but not limited to, statements regarding future events, developments in the healthcare sector and regulatory framework, the Company’s future performance, as well as management’s expectations, beliefs, intentions, plans, estimates or projections relating to the future (including, without limitation, statements concerning revenue, net income, and earnings per share). Risks and uncertainties exist that may cause the results to differ materially from those set forth in these forward-looking statements. Factors that could cause the anticipated results to differ from those described in the forward-looking statements and additional risks and uncertainties are set forth in Part I, Item A of our most recent Annual Report on Form 10-K for the fiscal year ended March 31, 2014, including but not limited to: the volume and timing of systems sales and installations; length of sales cycles and the installation process; the possibility that products will not achieve or sustain market acceptance; seasonal patterns of sales and customer buying behavior; impact of incentive payments under The American Recovery and Reinvestment Act on sales and the ability of the Company to meet continued certification requirements; the development by competitors of new or superior technologies; the timing, cost and success or failure of new product and service introductions, development and product upgrade releases; undetected errors or bugs in software; product liability; changing economic, political or

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Quality Systems

Fiscal 2015 Second Quarter Results

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regulatory influences in the health-care industry; changes in product-pricing policies; availability of third-party products and components; competitive pressures including product offerings, pricing and promotional activities; the Company’s ability or inability to attract and retain qualified personnel; possible regulation of the Company’s software by the U.S. Food and Drug Administration; changes of accounting estimates and assumptions used to prepare the prior periods’ financial statements; and general economic conditions. A significant portion of the Company’s quarterly sales of software product licenses and computer hardware is concluded in the last month of a fiscal quarter, generally with a concentration of such revenues earned in the final ten business days of that month. Due to these and other factors, the Company’s revenues and operating results are very difficult to forecast. A major portion of the Company’s costs and expenses, such as personnel and facilities, are of a fixed nature and, accordingly, a shortfall or decline in quarterly and/or annual revenues typically results in lower profitability or losses. As a result, comparison of the Company’s period-to-period financial performance is not necessarily meaningful and should not be relied upon as an indicator of future performance. The Company undertakes no obligation to publicly update any forward-looking statements, whether as a result of new information, future events or otherwise.

USE OF NON-GAAP FINANCIAL MEASURES

This news release contains certain non-GAAP (Generally Accepted Accounting Principles) financial measures, which are provided only as supplemental information. Investors should consider these non-GAAP financial measures only in conjunction with the comparable GAAP financial measures. These non-GAAP measures are not in accordance with or a substitute for U.S. GAAP. Pursuant to the requirements of Regulation G, the Company has provided a reconciliation of non-GAAP financial measures to the most directly comparable financial measure in the accompanying financial tables. Other companies may calculate non-GAAP measures differently than Quality Systems, which limits comparability between companies.

The Company believes that its presentation of non-GAAP diluted earnings per share provides useful supplemental information to investors and management regarding the Company’s financial condition and results. The Company calculates non-GAAP diluted earnings per share by excluding acquisition costs, amortization of acquired intangible assets, impairment of goodwill and other assets, securities litigation defense costs, share-based compensation, and other non-run-rate expenses from GAAP income before provision for income taxes. The non-GAAP provision for income taxes is calculated by excluding the income tax effect of the non-GAAP adjustments.

FINANCIAL TABLES ATTACHED

QUALITY SYSTEMS, INC.

CONSOLIDATED STATEMENTS OF INCOME

(IN THOUSANDS, EXCEPT PER SHARE DATA)

(UNAUDITED)

QUALITY SYSTEMS, INC.

CONSOLIDATED BALANCE SHEETS

(IN THOUSANDS)

(UNAUDITED)

QUALITY SYSTEMS, INC.

NON-GAAP FINANCIAL MEASURES

(IN THOUSANDS, EXCEPT PER SHARE DATA)

RECONCILIATION OF NON-GAAP DILUTED EARNINGS PER SHARE

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