Timeframe. Amazon and One Medical announced that Amazon completed its acquisition of One Medical on February 22, 2023, via Business Wire and their own sites.(aboutamazon.com) The prediction window (“within a year after closing the deal”) therefore runs to February 22, 2024.

Baseline telehealth footprint before Amazon’s expansion. Before and at the time of closing, One Medical had on the order of ~790,000–836,000 members, with memberships including 24/7 virtual care via its app.(siliconangle.com) That’s the rough starting telehealth footprint Amazon was buying.

Expansion actions within one year.

• On February 22, 2023 (closing day), Amazon and One Medical immediately rolled out a national promotion: new U.S. customers could buy a One Medical membership for $144 for the first year (vs. the usual $199), marketed through Amazon and explicitly including 24/7 virtual care and access to offices in many cities.(aboutamazon.com) This was an early step in using Amazon’s channels to grow One Medical membership.
• The decisive move came on November 8, 2023, about 8.5 months after closing. Amazon and One Medical launched a new Prime benefit under which Prime members can add a One Medical membership for $9/month or $99/year, up to $100 off the regular fee. This benefit includes nationwide 24/7 on‑demand virtual care (video chats and app‑based “Treat Me Now” for common conditions) at no extra cost, and is marketed as a standard, easy add‑on for Prime accounts on Amazon’s site.(onemedical.com) That explicitly expands One Medical–style telehealth to Amazon’s mainstream customer base.

Scale relative to Amazon’s customer base. Analysts estimate that around 180 million people in the U.S. had Amazon Prime memberships by early 2024, roughly three‑quarters of U.S. consumers.(businessinsider.com) Making One Medical—previously a sub‑million‑member service—available as a discounted, prominently marketed telehealth membership to this enormous Prime base (plus up to five family members per subscriber) is a very large increase in its potential telehealth reach.

Additional context (beyond the 1‑year window). In June 2024, Amazon further folded its separate “Amazon Clinic” virtual‑care product into the Amazon One Medical brand as a pay‑per‑visit telehealth option, explicitly positioning One Medical as the umbrella for Amazon’s telehealth offerings.(aboutamazon.com) This reinforces the direction of travel but is not needed to satisfy the within‑one‑year criterion.

Assessment. Within one year of the deal closing, Amazon:

• Leveraged its e‑commerce platform to push discounted One Medical memberships with 24/7 virtual care; and
• Launched a deeply discounted, nationally available 24/7 telehealth membership as a Prime benefit to a ~180M‑member U.S. customer base.

Given the jump from <1M One Medical members to telehealth services being marketed as a mainstream Prime add‑on for tens of millions of Amazon customers, it is reasonable to say Amazon “massively” and significantly expanded One Medical’s telehealth footprint within a year of closing, in line with Friedberg’s prediction.