CDC Surveillance System: Percentage of Patients with a Diagnosis of Hypertension

Percentage of Patients with a Diagnosis of Hypertension by Year and Age CMS-Medicaid (Centers for Medicare & Medicaid Services-Medicaid) for Michigan
Age	2007	2008	2009	2010	2011	2012
20–29 years	2 (CI 2-2)	4 (CI 4-4)	4 (CI 4-4)	4 (CI 4-4)	4 (CI 4-4)	4 (CI 4-4)
30–39 years	7 (CI 7-8)	12 (CI 12-12)	12 (CI 12-12)	13 (CI 12-13)	12 (CI 12-13)	12 (CI 12-13)
40–49 years	14 (CI 14-15)	22 (CI 22-23)	23 (CI 23-24)	24 (CI 24-24)	24 (CI 24-24)	25 (CI 24-25)
50–59 years	23 (CI 22-23)	34 (CI 34-34)	34 (CI 34-35)	35 (CI 35-35)	35 (CI 35-35)	35 (CI 35-36)
60–64 years	27 (CI 26-27)	40 (CI 40-41)	41 (CI 40-41)	41 (CI 40-41)	41 (CI 40-41)	41 (CI 41-42)
65–69 years	11 (CI 10-11)	18 (CI 17-18)	19 (CI 19-20)	18 (CI 18-19)	18 (CI 18-19)	22 (CI 21-22)
70–79 years	9 (CI 9-10)	15 (CI 14-15)	16 (CI 15-16)	15 (CI 14-15)	15 (CI 14-15)	16 (CI 16-16)
80–89 years	9 (CI 9-9)	13 (CI 13-14)	14 (CI 14-15)	14 (CI 13-14)	14 (CI 14-15)	14 (CI 13-14)
90+ years	7 (CI 7-8)	11 (CI 10-12)	11 (CI 11-12)	12 (CI 12-13)	13 (CI 12-13)	11 (CI 10-11)

The prevalence of hypertension by diagnosis code among adult patients increased from 2007 to 2008 and then was fairly stable from 2008 to 2012. The prevalence of hypertension is much lower in older groups, due in part to these people having dual coverage of Medicare and Medicaid. Medicare pays for most health care, but Medicaid pays for long-term-care and home health care services.

Chart Explanation: The chart shows on the y-axis (vertical line) the percentage of adult patients with a diagnosis of hypertension. The x-axis (horizontal line) shows age groups (the block of bars) by year, gender, or race/ethnicity (the individual colored bars).

Data are from the Medicaid datasets of claims (inpatient and outpatient) for Michigan residents from 2007 to 2012. See below for the list of ICD-9-CM or ICD-10-CM diagnostic codes used to determine CKD.

Diagnoses for medical conditions within Medicaid data come from inpatient and outpatient claims submitted by providers for the fee-for-service sections of Medicaid. Only patients aged 20 and older with >3 months Medicaid eligibility were included for the analysis.

Field	Data
Description of Measure	Prevalence of clinically diagnosed hypertension (by ICD-9-CM or ICD-10-CM codes).
Data Source	Centers for Medicare and Medicaid Services.
Type of Data Source	Administrative.
Data Set	Medicaid data for Michigan residents.
Health Care System Data	Yes.
Regional or National?	Regional—Michigan State.
Demographic Group	Patients enrolled in Medicaid in Michigan.
Numerator	Patients in denominator with diagnosed hypertension from an outpatient, inpatient or carrier claim.
Denominator	Patients aged 20 years old and older with more than 3 months of Medicaid eligibility in Michigan state.
Primary Data Source Indicator	Hypertension status determined by the presence of an ICD-9-CM code (401.x through 405.x) or ICD-10-CM code (H35.03x, I10.xx, I11.xx, I12.xx, I13.xx, I15.xxx, I67.4, N26.2) for hypertension on at least one inpatient, outpatient or carrier claim during the given calendar year.
Primary Indicator Method of Measurement	Diagnoses from inpatient, outpatient, and carrier claims.
Secondary (1) Variable	Age at the end of the previous calendar year.
Secondary (2) Variable	Sex/gender
Period Currently Available	2007–2012.

Suggested Citation:

Centers for Disease Control and Prevention. Chronic Kidney Disease Surveillance System—United States.
website. http://www.cdc.gov/ckd