Your CartoChrome Healthcare Access Score condenses a massive amount of spatial, demographic, and quality data into a single number that answers one question: **how good is healthcare access where you live?** This guide explains exactly what goes into that number, how to read the labels and tiers, and what you can do with the information.
Score + Label + Sentence: The Communication System
Every CartoChrome score is presented three ways simultaneously -- because a number alone is not enough.
- The Score is a number from 0 to 100. Higher is better.
- The Label is a plain-English classification: Healthcare Paradise (90-100), Excellent Access (70-89), Moderate Access (50-69), Limited Access (25-49), or Healthcare Desert (0-24).
- The Sentence is a generated explanation of what the score means in practical terms. For example: "Most healthcare needs can be met within a short drive, though specialist care may require traveling to a regional center."
This three-part system ensures that whether you are a data analyst, a homebuyer, a journalist, or a policymaker, you can immediately understand what the score means.
The 11 Score Types
Every ZIP code has not just one score, but 11. The **Overall Healthcare Access Score** is the headline number, computed from eight weighted components. But we also compute **10 condition-specific scores** that re-weight the components based on the healthcare services most relevant to each condition:
Check Your ZIP Code Health Score
See how your area compares across 11 health dimensions
Explore the Map- Alzheimer's Disease -- Weighted toward neurologists, memory care centers, and cognitive health services
- Arthritis -- Weighted toward rheumatologists, orthopedic specialists, and pain management
- Asthma -- Weighted toward pulmonologists, allergists, and respiratory care
- Breast Cancer -- Weighted toward mammography facilities, oncologists, and breast cancer treatment centers
- COPD -- Weighted toward pulmonary specialists and respiratory therapy
- Hypertension -- Weighted toward cardiologists and blood pressure management
- Lung Cancer -- Weighted toward oncologists, thoracic surgeons, and screening facilities
- Prostate Cancer -- Weighted toward urologists and prostate screening
- Type 1 Diabetes -- Weighted toward endocrinologists and insulin providers
- Type 2 Diabetes -- Weighted toward diabetes management, nutrition counseling, and primary care
These condition-specific scores matter because a ZIP code with a strong overall score might have poor access to the specific specialists you need. A retiree managing heart disease and an expecting mother have very different healthcare access requirements, and their condition-specific scores will reflect that.
How the SDOH Penalty Works
The Social Determinants of Health (SDOH) penalty is one of the most important -- and most misunderstood -- parts of the score. It captures the reality that provider proximity alone does not equal access. If you cannot afford care, cannot get to the clinic, or lack insurance, a hospital across the street is functionally inaccessible.
The SDOH penalty is computed from six sub-indices:
- Insurance (gamma = 1.20) -- The strongest penalty factor. ZIP codes with high uninsurance rates see the largest SDOH reduction.
- Economic (gamma = 0.90) -- Poverty and low income reduce effective access even when providers are nearby.
- Transportation (gamma = 1.00) -- Percentage of households without a vehicle. Critical in areas with no public transit.
- Health Literacy (gamma = 0.70) -- Educational attainment and language barriers.
- Disability (gamma = 0.80) -- Prevalence of mobility and cognitive disabilities.
- Age Vulnerability (gamma = 0.50) -- Proportion of elderly residents with access limitations.
The penalty is **multiplicative**, meaning compounding disadvantages hit harder than any single factor. A ZIP code that is uninsured AND lacks transportation AND has high poverty will see its score reduced far more than the sum of each individual penalty.
Importantly, the SDOH penalty can only reduce scores, not inflate them. Good social determinants do not create providers that do not exist. The penalty range is 0.35 to 1.05 -- ensuring that even the most advantaged ZIP code does not receive an artificial boost beyond what its provider availability warrants.
How to Take Action
Your Health Score is informational, not fatalistic. Here is how different audiences can use it:
- Individuals and families -- Factor the score into relocation decisions alongside school ratings and other neighborhood data. If your score is low, identify which component is weakest and plan accordingly (e.g., establish relationships with providers in nearby higher-access ZIP codes).
- Employers -- Assess healthcare access when evaluating office locations or designing relocation packages. Employees in low-access ZIP codes may need enhanced telehealth benefits or transportation stipends.
- Policymakers -- Use the data to target investments. If a county's emergency access component is critically low, that is an argument for a new urgent care facility or EMS station. If the SDOH penalty is the primary driver, interventions should focus on insurance enrollment and transit.
- Journalists -- The score provides a data-driven framework for reporting on healthcare access stories. Instead of anecdotes, you can show exactly which ZIP codes are affected and why.
Explore the map, check your ZIP code, and see how your area compares. Knowledge is the first step toward advocacy.