KBRA releases research assessing the characteristics of medical professional mortgage (MPM) loans, with a focus on their potential role as a niche collateral segment within the prime private label residential mortgage-backed securities (RMBS) market.

MPMs, often called physician or doctor loans, are specialized prime mortgage programs designed for medical professionals whose early-career financial profiles often include high student debt, limited savings, and reliance on employment contracts rather than established income histories. While MPMs were historically held on bank balance sheets, growing origination volumes and participation from prime private label RMBS issuers suggest these loans may emerge as a distinct collateral segment within the broader RMBS market.

Key Takeaways

• Banks frequently view physician mortgage programs as relationship-entry products, using them to establish broader client relationships that may expand into wealth management, practice lending, and other banking services.
• Compared with traditional prime jumbo loans, MPMs often permit higher loan-to-value ratios (LTV), higher debt-to-income (DTI) ratios, and more flexible income documentation to accommodate physician career trajectories, while typically maintaining full documentation and owner occupancy. Another feature of many physician mortgage programs is the prevalence of hybrid adjustable-rate mortgages (ARM), typically structured with an initial fixed-rate period followed by periodic rate resets.
• Physicians generally benefit from strong long-term earnings potential, low unemployment rates, and upward income trajectories, which may offset certain structural risk attributes such as high LTVs or limited reserves at origination.
• Because borrower occupation is not captured in RMBS datasets and most MPM loans have remained on bank balance sheets, product-specific securitized performance data is unavailable. However, portfolio observations from certain lenders suggest historically low default experience.
• KBRA estimates MPM production entering prime private-label securitization (PLS) channels could reach roughly $5 billion annually, placing the segment roughly within the same order of magnitude as other niche collateral types in prime RMBS.

Click here to view the report.

Related Publications

• Sequoia Mortgage Trust 2026-MED1 (SEMT 2026-MED1)
• KBRA Prime RMBS Default Study: Performance in the RMBS 2.0 Era
• U.S. RMBS Credit Indices
• The Evolving Landscape of Noncitizen Borrowers in U.S. RMBS

About KBRA

KBRA, one of the major credit rating agencies, is registered in the U.S., EU, and the UK. KBRA is recognized as a Qualified Rating Agency in Taiwan, and is also a Designated Rating Organization for structured finance ratings in Canada. As a full-service credit rating agency, investors can use KBRA ratings for regulatory capital purposes in multiple jurisdictions.

Doc ID: 1013979

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