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Find the research your denial letter is ignoring

Search the medical literature for the studies behind a letter of medical necessity — before a request goes in, or after one comes back refused. Pick the care, pick the wording your plan's policy uses, and get citations your clinician can cite, strongest kind of evidence first.

Applies to Denials that say not medically necessary, experimental, investigational, or cosmetic.

“Not medically necessary” and “experimental” are claims about the state of the evidence. They can be answered with the evidence, and the evidence is public — the same database every medical director uses is free, and almost nobody outside medicine knows how to search it.

Not all evidence weighs the same. A practice guideline from a specialty body is the strongest thing you can cite, then a systematic review, then a meta-analysis. Randomized trials sit lower here than you might expect, because randomizing people to surgery or no surgery is rarely possible or ethical — and a plan that demands one for a surgical procedure is asking for something that does not exist for most surgery.

This will not win an appeal by itself. A plan can acknowledge every paper here and still deny you. What citations do is change what the plan has to say next: it becomes much harder to call something experimental once a letter names the guideline and the reviews, with their PMIDs, in the plan’s own language.

Searching contacts only this site’s own server. Opening a citation goes to the NIH, like any other link you follow.

Everything published on a question, appraised together.

These are citations, not an argument.

A search matches words; it cannot tell whether a paper helps you, and some of these will not. They are raw material for the letter your clinician writes, and nobody should cite a paper they have not read. Published evidence also does not oblige a plan to cover anything — a plan can acknowledge all of it and still say no. It just becomes much harder to call the care experimental afterwards.

12 papers.

  • Use of gonadotropin-releasing hormone agonists in transgender and gender diverse youth: a systematic review.

    Frontiers in endocrinology · 2025

    Tornese G, Di Mase R, Munarin J, Ciancia S, Santamaria F

    PubMedFree full textPMID 40438403

  • Quality of life in people with transsexuality after surgery: a systematic review and meta-analysis.

    Health and quality of life outcomes · 2020 Aug 3

    Eftekhar Ardebili M, Janani L, Khazaei Z, Moradi Y, Baradaran HR

    PubMedFree full textPMID 32746856

  • Facial Gender Surgery: Systematic Review and Evidence-Based Consensus Guidelines from the International Facial Gender Symposium.

    Plastic and reconstructive surgery · 2022 Jan 1

    Coon D, Berli J, Oles N, Mundinger S, Thomas K

    PubMedPMID 34936625

  • Implementation of Patient-Reported Outcome Measures for Gender-Affirming Care Worldwide: A Systematic Review.

    JAMA network open · 2023 Apr 3

    Kamran R, Jackman L, Chan C, Suk Y, Jacklin C

    PubMedFree full textPMID 37010869

  • Fertility in transgender and gender diverse people: systematic review of the effects of gender-affirming hormones on reproductive organs and fertility.

    Human reproduction update · 2025 May 1

    De Roo C, Schneider F, Stolk THR, van Vugt WLJ, Stoop D

    PubMedPMID 39854640

  • A Systematic Review of Patient-Reported Outcome Measures Following Transsexual Surgery.

    Aesthetic plastic surgery · 2017 Jun

    Barone M, Cogliandro A, Di Stefano N, Tambone V, Persichetti P

    PubMedPMID 28204933

  • Facial Gender-Confirmation Surgery: A Systematic Mapping Review of Surgical Growth and Outcome Gaps.

    Medicina (Kaunas, Lithuania) · 2026 Jul 6

    Sáenz-Ravello G, Carrasco García P, Morrison SD, Inzulza Galdames A, Calderon T

    PubMedFree full textPMID 42512845

  • Effect of cross-sex hormones on the quality of life, depression and anxiety of transgender individuals: a quantitative systematic review.

    JBI database of systematic reviews and implementation reports · 2019 Sep

    Rowniak S, Bolt L, Sharifi C

    PubMedPMID 31021971

  • Do hormones and surgery improve the health of adults with gender incongruence? A systematic review of patient reported outcomes.

    ANZ journal of surgery · 2025 May

    Ireland K, Hughes M, Dean NR

    PubMedFree full textPMID 39973516

  • Setbacks in Forehead Feminization Cranioplasty: A Systematic Review of Complications and Patient-Reported Outcomes.

    Aesthetic plastic surgery · 2020 Jun

    Eggerstedt M, Hong YS, Wakefield CJ, Westrick J, Smith RM

    PubMedPMID 32152706

  • Sexual health after vaginoplasty: A systematic review.

    Andrology · 2021 Nov

    Kloer C, Parker A, Blasdel G, Kaplan S, Zhao L

    PubMedPMID 33882193

  • Outcome of Vaginoplasty in Male-to-Female Transgenders: A Systematic Review of Surgical Techniques.

    The journal of sexual medicine · 2015 Jun

    Horbach SE, Bouman MB, Smit JM, Ă–zer M, Buncamper ME

    PubMedPMID 25817066

How to use these: give the citations to whoever writes your letter of medical necessity. A letter that names a practice guideline and two systematic reviews, with PMIDs, is answering the plan in the plan’s own language. Searching here contacts only this site’s server; opening a PubMed link goes to the NIH.

Last updated 2026-08-07 · Not legal or medical advice