Mammoth Hospital Foundation

Nonprofit profile at a glance

EIN
202601653
IRS 990 coverage
2017–2024
Official website data refreshed
Sep 2026
Forms available
Form 990 2024, Form 990-EZ 2016
Location
Mammoth Lakes, CA, US
Phone
(760) 924-4128
Rating
76
Verdict
SUPPORTED
Rating confidence
Moderate
Sector
Fund Raising and/or Fund Distribution

Official website

Reported finances

Revenue
$2,342,853
Expenses
$1,492,666
Assets
$1,898,527
Liabilities
$93,720

Source: IRS Form 990. Selected filing: tax year 2024. Amounts in USD.

Leadership & pay

7 people listed

Executive titles in this filing

  • Gardiner Miller (Executive Director)

Highest reported compensation

  • Gardiner Miller (Executive Director): $141,206 total reported compensation

Source: IRS Form 990. Selected filing: tax year 2024. Names and roles reflect this filing, not necessarily current officeholders.

Overview

Mission

To support Mammoth Hospital in providing exceptional healthcare to the communities of the Eastern Sierra.

What it reported doing in 2024

Other Program Services: The Foundation provided broad support across numerous hospital and community initiatives. This included funding for staff development to ensure clinical excellence; support for Mammoth Hospitals mammography program to ensure cost is not a barrier to screening; and funding for the Cancer Outreach, Infusion, and Rhiannons Kids programs to alleviate the financial burden of travel and treatment for patients. Additional support was directed to community wellness programs and scholarships for lower income families enrolled in the hospital preschool.

Operating model

Revenue model
Donor-supported. 98% of the money available for current operations came from contributions and gifts.
Distribution model
Grant intermediary. The nonprofit sent 93% of its reported program spending out as grants.
  • Includes noncash contributions: Reported contributions include donated property or goods.

The verdict

SUPPORTED - The filed numbers largely add up and a large share of total spending goes to programs. A relatively small share of available resources goes toward mission work and some filing-based governance responses are negative or unanswered.

Rating breakdown

  • Financial Efficiency: 61
  • Transparency & Controls: 90
  • Accountability: 79
  • Sustainability: 66
  • Growth: 100

Detailed rating inputs

Financial Efficiency

  • Mission deployment rate: 52.1%; rating input score 52
  • Program expense ratio: 80.5%; rating input score 81
  • Fundraising efficiency: $13.52 raised per $1 spent on fundraising; rating input score 47; 47th percentile among comparable filings

Transparency & Controls

  • Consistency checks: 93.3%; rating input score 93; 17th percentile among comparable filings
  • Pay-setting controls: Limited
  • Foreign activity oversight: Limited
  • Grant itemization coverage: 100%; rating input score 100; 72nd percentile among comparable filings
  • Major donor itemization: Yes; rating input score 100
  • Related-party transparency: Limited

Accountability

  • Independent voting board: 100%; rating input score 100; 63rd percentile among comparable filings
  • Governance controls: 4 of 8 controls in place; rating input score 50
    • Conflict-of-interest policy: Fail
    • Whistleblower policy: Fail
    • Document-retention policy: Fail
    • CEO compensation review process: Fail
    • Other executive compensation review process: NotApplicable
    • Form 990 shared with the board: Pass
    • Board meeting minutes documented: Pass
    • Audit committee oversight: Pass
    • Independent financial-statement audit: Pass

Sustainability

  • Operating margin: 36.3%; rating input score 87; 87th percentile among comparable filings
  • Total-asset coverage ratio: 1.27; rating input score 45; 45th percentile among comparable filings
  • Liabilities to assets ratio: 0.05; rating input score 70; 70th percentile among comparable filings
  • Officer compensation ratio: 9.5%; rating input score 32; 32nd percentile among comparable filings

Growth

  • Program expense growth: 38.2% per year; rating input score 100; 95th percentile among comparable filings
  • Revenue growth: 35.6% per year; rating input score 100; 96th percentile among comparable filings
  • Asset growth: 31% per year; rating input score 100; 93rd percentile among comparable filings

Details

  • What they do: 12 programs and campaigns described on the official site · 1 operating location identified
  • Where the money goes: 52.1% of revenue deployed · 80.5% of spending went to programs
  • Governance: 6 of 6 board members independent · 4 of 8 filing controls reported
  • Programs: 4 filed program accomplishments · $1.2M in reported program spending
  • Leadership: top reported pay $141K · 7 people listed
  • Consistency: 25 of 26 current checks pass · 1 finding to review
  • Schedules: 8 filed schedules · includes major donors and grants
  • Filing history: 8 filing years from 2017 to 2024
  • Contacts: How to reach this organization
  • Money network: 2 filed money-flow records
  • Related organizations: 3 filed related-organization links
  • Grant readiness: Federal tax and exclusion status, award history, and grant-maker relationships.
  • People: Everyone the filings name, and which of them the filings identify by more than a name.

Key Signals

Signals prioritize questions for review. They are not findings of misconduct.

  • Review — Financial Efficiency: Mission deployment rate scored 52/100.
  • Review — Accountability: Governance controls: 4 of 8 not reported.
  • Moderate — Financial Efficiency: Fundraising efficiency scored 47/100.
  • Moderate — Sustainability: Total-asset coverage ratio scored 45/100.
  • Moderate — Transparency & Controls: Schedule A contributions reconciliation did not reconcile in the filed values.
  • Moderate — Sustainability: Officer compensation ratio scored 32/100.