People search MCBS (Medical Computer Business Services) data breach timeline because regulated data and trust are existential—one incident triggers class actions and regulator exams. BreachHistory indexes 1 MCBS (Medical Computer Business Services)-linked incident (1 company-confirmed), with headline counts up to 1.3M+ in catalog rows. This page maps every attested event through 2026 with internal links to canonical records.
Why MCBS (Medical Computer Business Services) breach history matters
MCBS (Medical Computer Business Services) operates in Healthcare (United States). Across indexed rows, recurring themes include ransomware and extortion, unverified actor or scraping claims. Understanding the chronological pattern helps security teams, customers, and regulators separate confirmed disclosures from forum marketing.
Full timeline through 2026
2025 — PEAR ransomware; HHS 1,261,464 individuals (Atlanta medical billing)
Verified breach. Verified healthcare business-associate breach — company notice and HHS OCR count. Atlanta-based Medical Computer Business Services (MCBS), a medical revenue cycle management and billing firm, detected unauthorized network access on or about September 25, 2025. Forensic review found an unauthorized user may have accessed or removed files between September 22 and September 26, 2025. On May 28, 2026, MCBS determined impacted files could include names, addresses, SSNs, dates of birth, health insurance identifiers, medi Exposed categories include Per MCBS notice: name, address, Social Security number, date of birth, health plan beneficiary number, health insurance policy/subscriber IDs, other health insurance information, m. BreachHistory cites approximately 1.3M+ affected records in this row. See the mcbs-pear2025 and canonical BreachHistory entry.
Patterns and analysis
- Ransomware and extortion — appears across multiple MCBS (Medical Computer Business Services) catalog entries; prioritize controls that address this class of failure.
- Unverified actor or scraping claims — appears across multiple MCBS (Medical Computer Business Services) catalog entries; prioritize controls that address this class of failure.
- Record-count hygiene — BreachHistory indexes actor-cited figures separately from company-confirmed totals; read each row's technicalWriteup before treating counts as fact.
- 2026 monitoring — New disclosures roll into this timeline as they are verified or labeled unverified per catalog policy.
What to do if you may be affected
- Step 1: Enable phishing-resistant MFA on every account tied to this brand.
- Step 2: Use unique passwords and a password manager—breach rows often involve credential reuse.
- Step 3: Monitor official company breach notices and regulator filings, not dark-web downloads.
- Step 4: Watch for medical-ID theft and billing fraud after health-data incidents.
- Step 5: Bookmark the MCBS (Medical Computer Business Services) company page for new 2026+ disclosures.
Canonical BreachHistory hub
Explore every indexed row: breachhistory.com/mcbs · Latest: mcbs-pear2025.
Sources: BreachHistory catalog (1 row for MCBS (Medical Computer Business Services)), company and regulator disclosures cited in individual breach records.