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Asthma Score
Significant gaps exist in healthcare availability for residents of 91789.
Data sources: CMS NPPES, Hospital Compare, ACS 5-Year Estimates. Scores recomputed monthly.
43/100
Limited Access
Comparisons
How the 43/100 asthma score for 91789 is calculated
Demographics, insurance coverage, and social determinants of health
Physician density, specialist availability, and telehealth
Hospital proximity, bed count, ER access, and facility quality
Commute times, public transit access, and vehicle availability
43
Limited Access · D+
39
Limited Access · D
This ZIP scores 4 points higher for asthma than its overall health score.
Each condition score reflects access to the specific specialists, screening facilities, and treatment centers relevant to that condition
Each score uses the same E2SFCA spatial access methodology but filtered to condition-relevant providers — the diabetes score weights endocrinologists and diabetes care centers, while the breast cancer score weights mammography facilities and oncologists.
Access to neurologists, memory care, and cognitive health services
Access to rheumatologists, orthopedics, and pain management
Access to mammography, oncologists, and breast cancer treatment
Access to pulmonary specialists and respiratory therapy
Access to cardiologists, blood pressure management, and heart care
Access to oncologists, thoracic surgeons, and lung cancer screening
Comprehensive healthcare access across all dimensions
Access to urologists, oncologists, and prostate screening
Access to endocrinologists, insulin providers, and diabetes care
Access to diabetes management, nutrition, and primary care
Health insurance coverage and social determinants of health
The Insurance Index reflects the demographic and social determinants of health in 91789. It factors in insurance coverage, poverty rates, age distribution, and population vulnerability to provide a composite view of community health readiness.
Physician density, specialist availability, and telehealth access
The Provider Density metric measures the availability of healthcare professionals near 91789. This includes primary care physicians, specialists, dentists, mental health professionals, and telehealth availability. A higher score means more providers per capita within a reasonable driving distance.
Hospital proximity, bed count, ER access, and facility quality
The Hospital Proximity metric evaluates distance to hospitals, emergency rooms, urgent care centers, and inpatient facilities near 91789. It factors in hospital quality ratings, bed availability, trauma center level, and average travel time to the nearest emergency department.
Commute infrastructure, public transit access, and vehicle availability
The Transit Access metric captures how easily residents can physically reach healthcare facilities. It combines commute patterns, public transit access, vehicle ownership rates, and walk/bike infrastructure to assess transportation barriers to care.
ZIP code 91789 on the map
Health scores for ZIP codes near 91789
Scores can vary dramatically between neighboring ZIP codes. A 20-point difference often means the boundary between having a hospital within 15 minutes versus needing to drive 45 minutes.
| ZIP Code | City | Score | Grade | Distance |
|---|---|---|---|---|
| 91792 | West Covina, CA | 39 | F | 2.68 mi |
| 91765 | Diamond Bar, CA | 39 | F | 3.11 mi |
| 91791 | West Covina, CA | 37 | F | 3.74 mi |
| 91748 | Rowland Heights, CA | 41 | D- | 3.87 mi |
| 91724 | Covina, CA | 35 | F | 4.28 mi |
| 91744 | La Puente, CA | 51 | D+ | 4.81 mi |
| 91768 | Pomona, CA | 35 | F | 4.85 mi |
| 91723 | Covina, CA | 35 | F | 4.96 mi |
| 91766 | Pomona, CA | 35 | F | 5.78 mi |
| 91790 | West Covina, CA | 38 | F | 5.87 mi |
Active physicians sorted by proximity to Walnut, California
Showing 15 physicians
View on MapProvider density is one of the strongest predictors of healthcare access. ZIPs with fewer than 1 provider per 1,000 residents are classified as Health Professional Shortage Areas by HRSA.
Hospitals, clinics, and care centers near California
SOUTHERN CALIFORNIA PERMANENTE MEDICAL GROUP
Healthcare Facility
1.83 mi away
POMONA VALLEY ORTHOPEDIC AND SPORTS PHYSICAL THERAPY INC
Healthcare Facility
2.43 mi away
WAYNE H MARTIN MD INC
Healthcare Facility
2.63 mi away
Healthcare Facility
Healthcare Facility
2.72 mi away
UNITED THERAPY NETWORK INCORPORATED
Healthcare Facility
3.33 mi away
Healthcare Facility
Healthcare Facility
3.49 mi away
Emergency services access is measured by drive time. The national standard is 30 minutes to the nearest ER. Rural ZIPs often exceed 60 minutes.
Telehealth access and commute patterns affecting healthcare delivery
Telehealth Boost reflects broadband availability and telehealth-capable providers. A higher percentage indicates greater virtual care access, reducing reliance on physical travel.
How transportation barriers affect healthcare access
52/100
Moderate Transportation Vulnerability
Higher scores = more vulnerable to transportation barriers
2.5%
Zero-Vehicle Households
1.83 mi
Nearest Hospital
40,933
Population
Transportation is the #1 non-medical barrier to healthcare access. Patients who lack reliable transportation miss 3x more appointments and have worse outcomes across every chronic condition.
Walnut, California
67.8% of the population in 91789 drive to work alone. 2.0% take public transportation. Approximately 32.3% of residents get to work in less than 30 minutes. The average household size is approximately 3.21 members with about 1.73 cars per household. About 2.5% of households have no vehicle, which can significantly impact access to healthcare facilities.
An estimated 95.2% of residents has some form of health insurance. N/A have public health insurance like Medicare, Medicaid, VA, or TRICARE. About N/A have private health insurance. The uninsured rate of 4.8% is below the national average, suggesting relatively good insurance coverage in this area.
ZIP code 91789 has a total population of 40,933 with a median age of 46.3. The area is 14.2% White, 2.1% Black, 67.6% Asian, and 18.4% Hispanic or Latino. The male-to-female ratio is 0.94. There are 8,013 residents under 18 and 9,009 residents over 65.
The median household income in 91789 is $125,742. 8.4% of households earn under $25,000 per year. 25.6% earn $200,000 or more. Above-average income levels generally support better healthcare access through ability to afford insurance premiums, copays, and transportation.
There are 13,486 housing units in 91789, with 10,483 owner-occupied and 2,233 renter-occupied. The median monthly housing cost is $2,868. Approximately 770 units are vacant.
Key demographic data for ZIP code 91789
Population density, median age, and income directly affect healthcare infrastructure. Older, wealthier communities attract more specialists. Younger, lower-income areas often have higher uninsured rates and fewer providers.
Population diversity in ZIP 91789
Healthcare access disparities correlate with racial composition. Racial and ethnic minorities are disproportionately located in Health Professional Shortage Areas, and Asian communities often face language access barriers. Source: HRSA, Health Workforce Analysis
Median: $125,742
Median household income is the strongest single predictor of health insurance coverage. ZIPs below $35,000 median income have uninsured rates 3–4x higher than ZIPs above $100,000.
56.6% hold a bachelor's degree or higher
Education level correlates with health literacy — the ability to understand medical information and navigate the healthcare system. Areas with higher bachelor's degree rates typically have better preventive care utilization.
Community reviews for ZIP 91789
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See how 91789 stacks up against nearby ZIP codes in healthcare access.
The CartoChrome Health Score uses an Enhanced Two-Step Floating Catchment Area (E2SFCA) algorithm combining 21 public data sources across 8 components. Each ZIP code receives a composite 0-100 score based on provider density, facility access, transportation infrastructure, and social determinants of health.
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