County

Marin, CA

FIPS: 06041 · 64,429 Medicare beneficiaries · Geographic Variation 2023

Overview

Key headline metrics for Medicare beneficiaries living in Marin, CA. Source data from the CMS Medicare Fee-for-Service Geographic Variation Public Use File (2023) and CDC PLACES/SDOH.

Total Medicare Spending per Capita
$10,313
Actual Spending per Capita
$14,616
includes local geographic adjustments
Average HCC Risk Score
0.87
1.00 = nationally average. Higher = sicker panel.
Average Age
75.0
30-Day Readmission Rate
14.9%
MA Participation
49.7%
share enrolled in Medicare Advantage
Dual Eligible
13.5%
also enrolled in Medicaid — low-income marker

Beneficiary Profile

Who the Medicare population is in this county — counts, enrollment mix, age, and risk-adjusted complexity.

Total Medicare Beneficiaries
64,429
Fee-for-Service Beneficiaries
28,518
MA Participation Rate
49.7%
Average Age
75.0
Average HCC Risk Score
0.87
CMS Hierarchical Condition Category score. Higher means a sicker average beneficiary.
Dual Eligible (Medicare + Medicaid)
13.5%
Share of beneficiaries also enrolled in Medicaid — a marker of low income and complex need.

Demographic mix

Female
55.8%
Male
44.2%
White
84.7%
Black
1.4%
Hispanic
3.9%

Utilization

How often Medicare beneficiaries use each service. Rates are per 1,000 beneficiaries; the "users" column shows the share of beneficiaries who used the service at least once.

30-Day Readmission Rate
14.9%
Share of hospital discharges followed by an unplanned readmission within 30 days.
ER Visits per 1,000 Benes
504.1

Health Outcomes

CDC PLACES — modeled prevalence of health outcomes among county adults. Values are age-adjusted or crude prevalence estimates with 95% CIs.

High cholesterol among adults who have ever been screened
37.3%
95% CI: 33.1% – 41.6%
Crude prevalence
High blood pressure among adults
32.6%
95% CI: 28.6% – 36.8%
Crude prevalence
Arthritis among adults
25.6%
95% CI: 22.5% – 29.1%
Crude prevalence
Depression among adults
22.1%
95% CI: 18.9% – 25.7%
Age-adjusted prevalence
Obesity among adults
21.3%
95% CI: 16.3% – 27.2%
Age-adjusted prevalence
Cancer (non-skin) or melanoma among adults
10.5%
95% CI: 9.4% – 11.6%
Crude prevalence
Current asthma among adults
9.5%
95% CI: 8.3% – 10.7%
Age-adjusted prevalence
Diagnosed diabetes among adults
7.5%
95% CI: 6.4% – 8.8%
Age-adjusted prevalence
Coronary heart disease among adults
6.4%
95% CI: 5.5% – 7.4%
Crude prevalence
All teeth lost among adults aged >=65 years
6.0%
95% CI: 4.7% – 7.4%
Age-adjusted prevalence
Chronic obstructive pulmonary disease among adults
5.3%
95% CI: 4.2% – 6.6%
Crude prevalence
Stroke among adults
3.2%
95% CI: 2.7% – 3.7%
Crude prevalence

Health Status

CDC PLACES — modeled prevalence of health status among county adults. Values are age-adjusted or crude prevalence estimates with 95% CIs.

Fair or poor self-rated health status among adults
16.6%
95% CI: 13.7% – 20.0%
Crude prevalence
Frequent mental distress among adults
13.9%
95% CI: 12.0% – 15.9%
Crude prevalence
Frequent physical distress among adults
10.6%
95% CI: 9.0% – 12.3%
Age-adjusted prevalence

Prevention

CDC PLACES — modeled prevalence of prevention among county adults. Values are age-adjusted or crude prevalence estimates with 95% CIs.

Cholesterol screening among adults
86.6%
95% CI: 84.4% – 88.6%
Age-adjusted prevalence
Mammography use among women aged 50-74 years
77.4%
95% CI: 70.0% – 83.6%
Age-adjusted prevalence
Visited dentist or dental clinic in the past year among adults
75.0%
95% CI: 71.9% – 77.8%
Age-adjusted prevalence
Visits to doctor for routine checkup within the past year among adults
74.6%
95% CI: 71.0% – 78.3%
Crude prevalence
Colorectal cancer screening among adults aged 45–75 years
59.8%
95% CI: 54.7% – 64.7%
Age-adjusted prevalence
Taking medicine to control high blood pressure among adults with high blood pressure
51.1%
95% CI: 46.7% – 55.5%
Age-adjusted prevalence
Current lack of health insurance among adults aged 18-64 years
5.5%
95% CI: 4.2% – 7.1%
Crude prevalence

Health Risk Behaviors

CDC PLACES — modeled prevalence of health risk behaviors among county adults. Values are age-adjusted or crude prevalence estimates with 95% CIs.

Short sleep duration among adults
28.6%
95% CI: 23.2% – 34.2%
Crude prevalence
No leisure-time physical activity among adults
18.2%
95% CI: 14.6% – 22.4%
Crude prevalence
Binge drinking among adults
15.4%
95% CI: 12.8% – 18.5%
Crude prevalence
Current cigarette smoking among adults
8.4%
95% CI: 6.4% – 10.7%
Age-adjusted prevalence

Disability

CDC PLACES — modeled prevalence of disability among county adults. Values are age-adjusted or crude prevalence estimates with 95% CIs.

Any disability among adults
24.5%
95% CI: 20.5% – 28.7%
Age-adjusted prevalence
Mobility disability among adults
12.6%
95% CI: 10.3% – 15.2%
Crude prevalence
Cognitive disability among adults
11.0%
95% CI: 9.2% – 13.0%
Crude prevalence
Independent living disability among adults
6.0%
95% CI: 5.0% – 7.1%
Age-adjusted prevalence
Hearing disability among adults
4.8%
95% CI: 4.1% – 5.5%
Age-adjusted prevalence
Vision disability among adults
3.9%
95% CI: 3.3% – 4.6%
Crude prevalence
Self-care disability among adults
2.5%
95% CI: 2.1% – 2.9%
Age-adjusted prevalence

Health-Related Social Needs

Community-level social and economic factors that drive health outcomes. Combines CDC PLACES health-related social-need measures (modeled from BRFSS) with CDC SDOH structural measures (from the American Community Survey).

Reported unmet needs (PLACES)

Loneliness among adults
31.6%
95% CI: 26.8% – 37.1%
Lack of social and emotional support among adults
22.8%
95% CI: 19.2% – 26.9%
Food insecurity in the past 12 months among adults
9.8%
95% CI: 7.6% – 12.6%
Housing insecurity in the past 12 months among adults
9.5%
95% CI: 7.7% – 11.8%
Received food stamps in the past 12 months among adults
8.5%
95% CI: 6.4% – 11.1%
Lack of reliable transportation in the past 12 months among adults
5.4%
95% CI: 4.5% – 6.5%
Utility services shut-off threat in the past 12 months among adults
5.0%
95% CI: 4.1% – 6.2%

Economic Stability

Below 150% Federal Poverty Level
10.9%
· MOE ±0.7
Share of county residents living below 150% of the federal poverty threshold.
Unemployment Rate
5.2%
· MOE ±0.6

Education & Connectivity

No High School Diploma (adults 25+)
6.6%
· MOE ±0.5
No Broadband Internet
6.3%
· MOE ±0.8
Share of households without a broadband internet subscription — a telehealth access barrier.

Housing

Housing Cost Burden
21.9%
· MOE ±1.1
Share of households paying more than 30% of income on housing.
Crowded Housing Units
4.4%
· MOE ±0.5
Single-Parent Households
4.5%
· MOE ±0.5

Demographics

Racial / Ethnic Minority Population
30.3%
· MOE ±0.5

All Data

Every labeled metric surfaced from Geographic Variation, PLACES, and SDOH, alongside the national county median for context.

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Source Metric Value National Median Pctl. Raw key
CDC PLACES All teeth lost among adults aged >=65 years 6.0% — TEETHLOST
CDC PLACES Any disability among adults 24.5% — DISABILITY
CDC PLACES Arthritis among adults 25.6% — ARTHRITIS
CDC PLACES Binge drinking among adults 15.4% — BINGE
CDC PLACES Cancer (non-skin) or melanoma among adults 10.5% — CANCER
CDC PLACES Cholesterol screening among adults 86.6% — CHOLSCREEN
CDC PLACES Chronic obstructive pulmonary disease among adults 5.3% — COPD
CDC PLACES Cognitive disability among adults 11.0% — COGNITION
CDC PLACES Colorectal cancer screening among adults aged 45–75 years 59.8% — COLON_SCREEN
CDC PLACES Coronary heart disease among adults 6.4% — CHD
CDC PLACES Current asthma among adults 9.5% — CASTHMA
CDC PLACES Current cigarette smoking among adults 8.4% — CSMOKING
CDC PLACES Current lack of health insurance among adults aged 18-64 years 5.5% — ACCESS2
CDC PLACES Depression among adults 22.1% — DEPRESSION
CDC PLACES Diagnosed diabetes among adults 7.5% — DIABETES
CDC PLACES Fair or poor self-rated health status among adults 16.6% — GHLTH
CDC PLACES Food insecurity in the past 12 months among adults 9.8% — FOODINSECU
CDC PLACES Frequent mental distress among adults 13.9% — MHLTH
CDC PLACES Frequent physical distress among adults 10.6% — PHLTH
CDC PLACES Hearing disability among adults 4.8% — HEARING
CDC PLACES High blood pressure among adults 32.6% — BPHIGH
CDC PLACES High cholesterol among adults who have ever been screened 37.3% — HIGHCHOL
CDC PLACES Housing insecurity in the past 12 months among adults 9.5% — HOUSINSECU
CDC PLACES Independent living disability among adults 6.0% — INDEPLIVE
CDC PLACES Lack of reliable transportation in the past 12 months among adults 5.4% — LACKTRPT
CDC PLACES Lack of social and emotional support among adults 22.8% — EMOTIONSPT
CDC PLACES Loneliness among adults 31.6% — LONELINESS
CDC PLACES Mammography use among women aged 50-74 years 77.4% — MAMMOUSE
CDC PLACES Mobility disability among adults 12.6% — MOBILITY
CDC PLACES No leisure-time physical activity among adults 18.2% — LPA
CDC PLACES Obesity among adults 21.3% — OBESITY
CDC PLACES Received food stamps in the past 12 months among adults 8.5% — FOODSTAMP
CDC PLACES Self-care disability among adults 2.5% — SELFCARE
CDC PLACES Short sleep duration among adults 28.6% — SLEEP
CDC PLACES Stroke among adults 3.2% — STROKE
CDC PLACES Taking medicine to control high blood pressure among adults with high blood pressure 51.1% — BPMED
CDC PLACES Utility services shut-off threat in the past 12 months among adults 5.0% — SHUTUTILITY
CDC PLACES Vision disability among adults 3.9% — VISION
CDC PLACES Visited dentist or dental clinic in the past year among adults 75.0% — DENTAL
CDC PLACES Visits to doctor for routine checkup within the past year among adults 74.6% — CHECKUP
CDC SDOH Below 150% FPL (%) 10.9% — POVERTY
CDC SDOH Crowded Housing (%) 4.4% — CROWDING
CDC SDOH Housing Cost Burden (%) 21.9% — HOUSING_BURDEN
CDC SDOH No Broadband (%) 6.3% — NO_BROADBAND
CDC SDOH No High School Diploma (%) 6.6% — NO_DIPLOMA
CDC SDOH Racial/Ethnic Minority (%) 30.3% — MINORITY
CDC SDOH Single-Parent Households (%) 4.5% — SINGLE_PARENT
CDC SDOH Unemployment (%) 5.2% — UNEMPLOYMENT
Geographic Variation Acute Hospital Readmission Rate (%) 14.9% — ACUTE_HOSP_READMSN_PCT
Geographic Variation Average Beneficiary Age 75.00 — BENE_AVG_AGE
Geographic Variation Average HCC Risk Score 0.87 — BENE_AVG_RISK_SCRE
Geographic Variation Black Beneficiaries (%) 1.4% — BENE_RACE_BLACK_PCT
Geographic Variation Dual Eligible Beneficiaries (%) 13.5% — BENE_DUAL_PCT
Geographic Variation ER Visits per 1,000 Beneficiaries 504.1 — ER_VISITS_PER_1000_BENES
Geographic Variation Female Beneficiaries (%) 55.8% — BENE_FEML_PCT
Geographic Variation FFS Beneficiary Count 28,518 — BENES_FFS_CNT
Geographic Variation Hispanic Beneficiaries (%) 3.9% — BENE_RACE_HSPNC_PCT
Geographic Variation Home Health Actual Per Capita Payment ($) $599 — HH_MDCR_PYMT_PC
Geographic Variation Home Health Standardized Per Capita Payment ($) $371 — HH_MDCR_STDZD_PYMT_PC
Geographic Variation Hospice Actual Per Capita Payment ($) $655 — HOSPC_MDCR_PYMT_PC
Geographic Variation Hospice Standardized Per Capita Payment ($) $430 — HOSPC_MDCR_STDZD_PYMT_PC
Geographic Variation Inpatient Actual Per Capita Payment ($) $4,219 — IP_MDCR_PYMT_PC
Geographic Variation Inpatient Standardized Per Capita Payment ($) $2,294 — IP_MDCR_STDZD_PYMT_PC
Geographic Variation Male Beneficiaries (%) 44.2% — BENE_MALE_PCT
Geographic Variation Medicare Advantage Participation Rate (%) 49.7% — MA_PRTCPTN_RATE
Geographic Variation Outpatient Actual Per Capita Payment ($) $2,820 — OP_MDCR_PYMT_PC
Geographic Variation Outpatient Standardized Per Capita Payment ($) $2,057 — OP_MDCR_STDZD_PYMT_PC
Geographic Variation SNF Actual Per Capita Payment ($) $1,300 — SNF_MDCR_PYMT_PC
Geographic Variation SNF Standardized Per Capita Payment ($) $783 — SNF_MDCR_STDZD_PYMT_PC
Geographic Variation Total Actual Per Capita Medicare Payment ($) $14,616 — TOT_MDCR_PYMT_PC
Geographic Variation Total Beneficiary Count 64,429 — BENES_TOTAL_CNT
Geographic Variation Total Standardized Per Capita Medicare Payment ($) $10,313 — TOT_MDCR_STDZD_PYMT_PC
Geographic Variation White Beneficiaries (%) 84.7% — BENE_RACE_WHT_PCT

Methodology

Primary source: Medicare Geographic Variation by County (dataset id geo-var-county, vintage 2023, downloaded 2026-04-13, 33,639 rows in source).

Additional data sources: CDC PLACES County-Level Data (2026), CDC SDOH Measures for County (2017-2021).

Percentile badges compare this county against all US counties that appear in the relevant dataset. "Lower is better" metrics (spending, readmission rates, chronic-disease prevalence, SDOH adversity) use an inverted color ramp — low percentile = green (good), high percentile = red (bad).

Medicare Geographic Variation shows standardized per-capita spending, utilization, and demographic characteristics for Medicare fee-for-service beneficiaries at the county level. Standardized payments remove geographic payment adjustments so counties can be compared fairly. AHRQ Prevention Quality Indicators (PQIs) measure the rate of hospitalization for ambulatory-care-sensitive conditions (ACSCs).

Full methodology →