Oak Street Health

Oak Street Health is a United States primary-care provider whose clinics focus mainly on older adults and people with disabilities covered by Medicare, including beneficiaries enrolled in Medicare Advantage plans. The company was founded in Chicago in 2012 by Mike Pykosz, Griffin Myers, and Geoff Price. Its operating model combines neighborhood-based primary-care centers with preventive medicine, chronic-condition management, care coordination, patient education, and nonclinical support intended to address social and behavioral factors affecting health. Rather than positioning its centers solely as traditional physician offices, Oak Street developed a value-based care model in which the provider is financially aligned with the health outcomes and overall cost of care of its attributed patient population. The company has emphasized longer-term relationships between patients and care teams, proactive outreach, transportation and appointment support, wellness education, and community-oriented activities. Its target population has generally included seniors with complex or recurring medical needs, for whom effective primary care can reduce avoidable emergency-department use and hospitalizations. The business expanded through a network of branded centers in multiple U.S. states. By January 2020, it had reached approximately 50 centers in eight states, and by October 2021 it operated more than 100 centers in 18 states. The network subsequently grew to more than 170 centers nationwide in 2024, according to reference material associated with the company’s encyclopedia entry. Oak Street has also used technology and partnerships to extend its care model. In October 2021, it acquired RubiconMD, a health-technology company whose virtual specialty-care capabilities were intended to support primary-care clinicians and patients. Oak Street raised private capital before completing an initial public offering in August 2020. The IPO raised approximately $328 million through the sale of 15.6 million shares at $21 per share on the New York Stock Exchange under the symbol OSH. The company later became the subject of a major healthcare-industry acquisition. In February 2023, CVS Health announced an agreement to acquire Oak Street in an all-cash transaction valued at approximately $10.6 billion, with a stated offer price of $39 per share. The transaction closed in May 2023, making Oak Street part of CVS Health and ending its status as an independent public company. Following the acquisition, Oak Street continued operating as a CVS Health primary-care business. Its strategic significance lies in CVS Health’s broader effort to combine insurance, pharmacy, care delivery, and provider assets. The brand’s model also attracted regulatory and legal scrutiny. In September 2024, Oak Street agreed to pay $60 million to settle allegations concerning violations of the federal Anti-Kickback Statute; the settlement did not represent an admission of liability in the reference material. In a later cost-reduction effort, CVS announced plans to close 16 Oak Street locations, citing elevated medical costs. Oak Street therefore remains an active care-delivery brand, but its ownership, financial reporting, and strategic direction are now integrated into CVS Health rather than presented through a standalone public company.

Oak Street Health was established in Chicago in 2012 by Mike Pykosz, Griffin Myers, and Geoff Price. The founders built the company around a primary-care model for older adults and people with disabilities who receive Medicare. Its stated objective was to improve health outcomes while lowering the total cost of care through prevention, early intervention, care coordination, and sustained relationships between patients and clinical teams. The company’s centers were designed as community-based access points rather than narrowly transactional physician practices. In addition to medical appointments, Oak Street emphasized preventive care, patient education, social activities, and assistance addressing practical barriers to treatment. Its value-based approach was particularly associated with Medicare Advantage populations, where providers and health plans have incentives to manage chronic disease and avoid unnecessary acute-care utilization. Oak Street was selected by AARP as a primary-care provider, according to the reference material. Expansion was gradual but substantial. By January 2020, Oak Street had approximately 50 centers across eight states. It entered the public markets in August 2020, raising roughly $328 million in an IPO consisting of 15.6 million shares priced at $21 each. The shares traded on the New York Stock Exchange under the symbol OSH. The company continued expanding its clinic footprint and by October 2021 had more than 100 centers in 18 states. Technology became part of the company’s growth strategy. In October 2021, Oak Street acquired RubiconMD for approximately $130 million. RubiconMD provided technology intended to connect primary-care clinicians with virtual specialty-care expertise. The acquisition was designed to extend Oak Street’s care model beyond the physical clinic and make specialist input more accessible within primary-care workflows. On February 8, 2023, CVS Health announced a definitive agreement to purchase Oak Street Health in an all-cash transaction. The announced offer was $39 per share and represented an enterprise value of approximately $10.6 billion. The transaction closed in May 2023. Oak Street consequently became part of CVS Health’s care-delivery portfolio, and its OSH public listing ceased to represent an independent company. After the acquisition, the Oak Street brand continued to operate primary-care centers under CVS Health ownership. Reference material indicates that the network exceeded 170 centers nationwide in 2024. The company later faced significant legal and operating developments. In September 2024, it paid $60 million to settle allegations related to the federal Anti-Kickback Statute. Separately, CVS announced the closure of 16 Oak Street locations, attributing the decision to elevated medical costs. These events illustrate the tension between Oak Street’s expansion-oriented value-based-care strategy and the financial discipline required to operate senior-focused primary-care assets at scale.

1. 2024Network exceeds 170 centers

   Reference material reports that Oak Street Health has expanded to more than 170 centers nationwide.

   Source
2. 2023Acquisition by CVS Health

   CVS Health completes its approximately $10.6 billion acquisition of Oak Street, converting the company from an independent public issuer into a CVS Health business.

   Source
3. 2021RubiconMD acquisition

   Oak Street acquires RubiconMD for approximately $130 million to add virtual specialty-care capabilities.

   Source
4. 2020Public-market debut

   Oak Street raises approximately $328 million through an IPO of 15.6 million shares priced at $21 each and begins trading on the NYSE under OSH.

   Source
5. 2012Oak Street Health is founded

   Mike Pykosz, Griffin Myers, and Geoff Price establish Oak Street Health in Chicago as a primary-care organization focused on older adults and Medicare beneficiaries.

   Source

A value-based, neighborhood primary-care provider focused on older adults and other Medicare beneficiaries.

• Oak Street Health primary-care centersPrimary-care services2012

  Neighborhood clinics providing routine primary care, preventive screenings, chronic-condition management, medication-related support, referrals, and ongoing care coordination. The centers are designed primarily for older adults and other Medicare beneficiaries and are supported by multidisciplinary teams.

• Medicare-focused value-based careValue-based healthcare2012

  A care-delivery model centered on Medicare populations, especially patients enrolled in Medicare Advantage. Oak Street uses preventive care, outreach, education, and coordinated treatment to pursue better outcomes and lower avoidable healthcare utilization.

• RubiconMD virtual specialty-care capabilityDigital health2021

  Technology obtained through the 2021 RubiconMD acquisition, intended to give primary-care clinicians access to virtual specialist input and integrate specialty guidance into Oak Street’s broader care model.

• Community-centered senior care

  United States

  Oak Street’s public-facing care approach combines preventive medicine, health education, and social activities with clinic-based primary care to support the broader well-being of older adults.

  Outcome. Established the brand’s differentiation around relationship-based, community-oriented Medicare primary care.

  Source

• 2023Accept CVS Health acquisitionM&A

  CVS Health aimed to expand its healthcare-delivery capabilities through a large senior-focused primary-care platform.

  What changed. Oak Street entered into and completed an all-cash acquisition by CVS Health at a stated price of $39 per share.

  Aftermath. Oak Street became part of CVS Health in May 2023 and ceased to operate as an independent publicly listed company.

  Enterprise value. $10.6 billion (Announced February 2023; completed May 2023)

  Source
• 2021Acquire RubiconMDM&A

  Oak Street sought to extend primary-care capabilities through digital access to specialist expertise.

  What changed. The company acquired RubiconMD for approximately $130 million.

  Aftermath. RubiconMD’s virtual specialty-care technology became part of Oak Street’s care-delivery strategy.

  Acquisition price. $130 million (October 2021)

  Source
• 2020Launch a public-company financing strategyStrategy

  Oak Street required capital to expand its clinic network and value-based primary-care platform.

  What changed. The company completed an IPO on the New York Stock Exchange, selling 15.6 million shares at $21 per share.

  Aftermath. The offering raised approximately $328 million and provided Oak Street with public-market access until its acquisition by CVS Health.

  IPO proceeds. $328 million (August 2020)

  Source
• Close 16 Oak Street locationsStrategy

  CVS cited elevated medical costs in announcing a reduction of part of the Oak Street clinic footprint.

  What changed. CVS announced plans to close 16 Oak Street locations.

  Aftermath. The closures represented a retrenchment within the network, although the available material does not specify the affected markets or completion date.

  Source

• 2024Anti-Kickback Statute settlementControversy

  Oak Street paid $60 million to settle a lawsuit alleging violations of the federal Anti-Kickback Statute. The available reference material does not provide the detailed allegations or state that the company admitted liability.

  Source

• 2023CVS Health agrees to acquire Oak Street Health

  CVS Health announced an all-cash agreement valued at approximately $10.6 billion, based on an offer price of $39 per share.

  M&A
  Source
• 2023CVS Health completes Oak Street Health acquisition

  The acquisition closed in May 2023, bringing Oak Street Health into CVS Health and ending Oak Street’s independent public-company status.

  M&A
  Source
• 2021Oak Street Health acquires RubiconMD

  The company acquired virtual specialty-care technology provider RubiconMD for approximately $130 million to support integration of specialist expertise into its primary-care model.

  M&A
  Source
• 2020Oak Street Health completes initial public offering

  Oak Street Health raised approximately $328 million in an IPO, selling 15.6 million shares at $21 per share on the New York Stock Exchange under the ticker OSH.

  Other
  Source
• 2020Oak Street Health completes its initial public offering

  Oak Street sold 15.6 million shares at $21 per share in an offering on the New York Stock Exchange, raising approximately $328 million.

  Other
  Source
• CVS announces closures of 16 Oak Street locations

  CVS announced plans to close 16 Oak Street locations, citing elevated medical costs as a reason for the operating change.

  Other
  Source
• CVS announces closures of Oak Street Health locations

  Reference material reports that CVS planned to close 16 Oak Street locations because of elevated medical costs.

  Other
  Source

1. Oak Street Health
2. Oak Street Health official website