Exhibit 99.1

PRESS RELEASE

ANTHEM REPORTS FIRST QUARTER 2018 RESULTS

REFLECTING STRONG MEDICAL COST PERFORMANCE

Indianapolis, Ind. – April 25, 2018 – Anthem, Inc. (NYSE: ANTM) reported strong first quarter 2018 financial results and improved margins while continuing to make strategic investments in growth initiatives.

“We are pleased with our first quarter 2018 financial performance, which reflects our commitment to strong medical cost performance by effectively leveraging community based innovative and integrated clinical and value based care models across our markets,” said Gail K. Boudreaux, President and CEO. “Throughout 2018, we are prioritizing investments to create a more flexible infrastructure that can quickly respond to the evolving needs of our customers and the changing healthcare environment. We are also driving an increased focus on executional excellence across the organization. I see further opportunity for Anthem as we continue to unlock the full potential of our company to deliver consistently strong financial performance and future growth.”

Based on first quarter results and the business outlook for the remainder of the year, Anthem has increased its outlook for 2018 adjusted net earnings to be greater than $15.30* per share.

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CONSOLIDATED HIGHLIGHTS

Membership: Medical enrollment totaled approximately 39.6 million members at March 31, 2018, a decrease of 1.0 million members, or 2.5% percent, from 40.6 million at March 31, 2017. The enrollment decrease was driven predominantly by a reduced footprint in the Individual ACA-compliant marketplace. Enrollment gains in fee-based services were partially offset by declines in Local Group insured membership. Medicaid enrollment declined by 120,000 individuals while Medicare grew by 237,000 lives.

Medical enrollment declined by 616 thousand lives sequentially during the first quarter of 2018. The decrease reflected enrollment declines in the Individual and Local Group fully-insured businesses, partially offset by growth in the National, Medicare, and BlueCard^® businesses.

Operating Revenue: Operating revenue was $22.3 billion in the first quarter of 2018, flat compared to the $22.3 billion in the prior year quarter. The results reflected premium rate increases to cover overall cost trends across our business as well as the return of the health insurance tax in 2018. Revenues also increased due to the acquisitions of Health Sun and America’s 1st Choice as well as organic membership growth in the Medicare business. These increases were offset by a reduced footprint in the Individual ACA-compliant marketplace and membership declines in the Local Group fully-insured and Medicaid businesses.

Benefit Expense Ratio: The benefit expense ratio was 81.5 percent in the first quarter of 2018, a decrease of 220 basis points from 83.7 percent in the prior year quarter. The decrease was primarily driven by the return of the health insurance tax in 2018 and improved medical cost performance across our business segments.

Medical claims reserves established at December 31, 2017 developed moderately better than the Company’s expectation during the first quarter of 2018.

Medical Cost Trend: For the full year 2018, the Company continues to expect underlying Local Group medical cost trend to be in the range of 6.0% +/- 50 basis points.

Days in Claims Payable: Days in Claims Payable (“DCP”) was 40.3 days as of March 31, 2018, an increase of 0.9 days from 39.4 days as of December 31, 2017.

SG&A Expense Ratio: The SG&A expense ratio was 15.3 percent in the first quarter of 2018, an increase of 100 basis points from 14.3 percent in the first quarter of 2017. The increase, as expected, was primarily driven by the return of the health insurance tax in 2018 as well as the impact of increased investment spend in 2018 to support growth initiatives. The increase was partially offset by the Penn Treaty assessments that were recorded in the first quarter of 2017 and lower administrative spend from expense efficiency initiatives.

Operating Cash Flow: Operating cash flow was $2.2 billion, or 1.7 times net income in the first quarter of 2018. For the first quarter of 2017, operating cash flow was $2.7 billion, or 2.7 times net income.

Share Repurchase Program: During the first quarter of 2018, the Company repurchased 1.7 million shares of its common stock for $395 million, or a weighted-average price of $233.51. As of March 31, 2018, the Company had approximately $6.8 billion of Board-approved share repurchase authorization remaining.

Cash Dividend: During the first quarter of 2018, the Company paid a quarterly dividend of $0.75 per share, representing a distribution of cash totaling $191.9 million.

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On April 24, 2018, the Audit Committee declared a second quarter 2018 dividend to shareholders of $0.75 per share. On an annualized basis, this equates to a dividend of $3.00 per share. The second quarter dividend is payable on June 25, 2018 to shareholders of record at the close of business on June 8, 2018.

Investment Portfolio & Capital Position: During the first quarter of 2018, the Company recorded net realized losses on financial instruments totaling $26.1 million and other-than-temporary impairment losses totaling $7.9 million. During the first quarter of 2017, the Company recorded net realized gains of $7.3 million and other-than-temporary impairment losses totaling $8.1 million.

As of March 31, 2018, the Company’s net unrealized gain position in the investment portfolio was $18.7 million, consisting entirely of fixed maturity securities. The adoption of a change in accounting standards has resulted in the Company accounting for changes in the value of equity securities in realized gains or losses. As of March 31, 2018 cash and investments at the parent company totaled approximately $1.1 billion.

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REPORTABLE SEGMENTS

Anthem, Inc. has three reportable segments: Commercial & Specialty Business (comprised of the Local Group, National Accounts, Individual and Specialty businesses); Government Business (comprised of the Medicaid and Medicare businesses, National Government Services, and the Federal Employee Program); and Other (comprised of unallocated corporate expenses and certain other businesses that do not meet the quantitative thresholds for separate reportable segment disclosure).

Commercial & Specialty Business: Operating gain in the Commercial & Specialty Business segment totaled $1,408.4 million in the first quarter of 2018, an increase of $106.0 million, or 8.1 percent, from $1,302.4 million in the first quarter of 2017. The increase was primarily driven by the Penn Treaty assessments that were recorded in the first quarter of 2017 and improved medical cost performance. The increase was partially offset by a reduced footprint in the Individual ACA-compliant marketplace and increased investment spend to support our growth initiatives.

Government Business: Operating gain in the Government Business segment was $490.9 million in the first quarter of 2018, an increase of $172.3 million, or 54.1 percent, from $318.6 million in the first quarter of 2017. The increase reflects the impact of the HealthSun and America’s 1st Choice acquisitions as well as organic membership increases in the Medicare business, and retroactive revenue adjustments in the Medicaid business. The increase was partially offset by increased investment spend to support our growth initiatives.

Other: The Company reported an operating loss of $31.4 million in the Other segment for the first quarter of 2018, compared with an operating loss of $35.6 million in the prior year quarter.

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OUTLOOK

Full Year 2018:

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Basis of Presentation

Conference Call and Webcast

Management will host a conference call and webcast today at 8:30 a.m. Eastern Daylight Time (“EDT”) to discuss the company’s first quarter results and outlook. The conference call should be accessed at least 15 minutes prior to the start of the call with the following numbers:

An access code is not required for today’s conference call. The access code for the replay is 432033. The replay will be available from 11:00 a.m. EDT today, until the end of the day on May 9, 2018. The call will also be available through a live webcast at www.antheminc.com under the “Investors” link. A webcast replay will be available following the call.

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About Anthem, Inc.

Anthem is working to transform health care with trusted and caring solutions. Our health plan companies deliver quality products and services that give their members access to the care they need. With over 74 million people served by its affiliated companies, including nearly 40 million within its family of health plans, Anthem is one of the nation’s leading health benefits companies. For more information about Anthem’s family of companies, please visit www.antheminc.com/companies.

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Anthem, Inc.

GAAP Reconciliation

(Unaudited)

Anthem, Inc. has referenced “Adjusted Net Income” and “Adjusted Net Income Per Share,” which are non-GAAP measures, in this document. These non-GAAP measures are not intended to be alternatives to any measure calculated in accordance with GAAP. In addition to these non-GAAP measures, references are made to the measures “Operating Revenue” and “Operating Gain.” Each of these measures is provided to further aid investors in understanding and analyzing the company’s core operating results and comparing Anthem, Inc.’s financial results. A reconciliation of Operating Revenue to Total Revenue is set forth in the Consolidated Statements of Income herein. A reconciliation of the non-GAAP measures to the most directly comparable measures calculated in accordance with GAAP, together with a reconciliation of reportable segments operating gain to income before income tax expense, is reported below.

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Forward-Looking Statements

This document contains “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. Forward-looking statements reflect our views about future events and financial performance and are generally not historical facts. Words such as “expect,” “feel,” “believe,” “will,” “may,” “should,” “anticipate,” “intend,” “estimate,” “project,” “forecast,” “plan” and similar expressions are intended to identify forward-looking statements. These statements include, but are not limited to: financial projections and estimates and their underlying assumptions; statements regarding plans, objectives and expectations with respect to future operations, products and services; and statements regarding future performance. Such statements are subject to certain risks and uncertainties, many of which are difficult to predict and generally beyond our control, that could cause actual results to differ materially from those expressed in, or implied or projected by, the forward-looking statements. You are cautioned not to place undue reliance on these forward-looking statements that speak only as of the date hereof. You are also urged to carefully review and consider the various risks and other disclosures discussed in our reports filed with the U.S. Securities and Exchange Commission from time to time, which attempt to advise interested parties of the factors that affect our business. Except to the extent otherwise required by federal securities laws, we do not undertake any obligation to republish revised forward-looking statements to reflect events or circumstances after the date hereof. These risks and uncertainties include, but are not limited to: the impact of federal and state regulation, including ongoing changes in the Patient Protection and Affordable Care Act and the Health Care and Education Reconciliation Act of 2010, as amended, or collectively the ACA; trends in healthcare costs and utilization rates; our ability to contract with providers on cost-effective and competitive terms; our ability to secure sufficient premium rates including regulatory approval for and implementation of such rates; reduced enrollment; risks and uncertainties regarding Medicare and Medicaid programs, including those related to non-compliance with the complex regulations imposed thereon, our ability to maintain and achieve improvement in Centers for Medicare and Medicaid Services, or CMS, Star ratings and other quality scores and funding risks with respect to revenue received from participation therein; competitive pressures, including competitor pricing, which could affect our ability to maintain or increase our market share; a negative change in our healthcare product mix; our ability to adapt to changes in the industry and develop and implement strategic growth opportunities; costs and other liabilities associated with litigation, government investigations, audits or reviews; the ultimate outcome of litigation between Cigna Corporation, or Cigna, and us related to the merger agreement between the parties, including our claim for damages against Cigna, Cigna’s claim for payment of a termination fee and other damages against us, and the potential for such litigation to cause us to incur substantial costs, materially distract management and negatively impact our reputation and financial positions; medical malpractice or professional liability claims or other risks related to healthcare services provided by our subsidiaries; possible restrictions in the payment of dividends by our subsidiaries and increases in required minimum levels of capital; the potential negative effect from our substantial amount of outstanding indebtedness; a downgrade in our financial strength ratings; the effects of any negative publicity related to the health benefits industry in general or us in particular; unauthorized disclosure of member or employee sensitive or confidential information, including the impact and outcome of any investigations, inquiries, claims and litigation related thereto; failure to effectively maintain and modernize our information systems; non-compliance by any party with the Express Scripts, Inc. pharmacy benefit management services agreement, which could result in financial penalties, our inability to meet customer demands, and sanctions imposed by governmental entities, including CMS; state guaranty fund assessments for insolvent insurers; events that may negatively affect our licenses with the Blue Cross and Blue Shield Association; regional concentrations of our business and future public health epidemics and catastrophes; general risks associated with mergers, acquisitions and strategic alliances; our ability to repurchase shares of our common stock and pay dividends on our common stock due to the adequacy of our cash flow and earnings and other considerations; possible impairment of the value of our intangible assets if future

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results do not adequately support goodwill and other intangible assets; changes in economic and market conditions, as well as regulations that may negatively affect our liquidity and investment portfolios; changes in U.S. tax laws; intense competition to attract and retain employees; various laws and provisions in our governing documents that may prevent or discourage takeovers and business combinations; and general economic downturns.

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