<![CDATA[Abstract. The quality of healthcare services, particularly Drug Information Services (DIS), plays an important role in shaping patient satisfaction and loyalty in primary healthcare facilities. This study aimed to determine patient satisfaction with DIS at the Pharmacy Installation of Tanjungsiang Public Health Center, Subang Regency, based on the five SERVQUAL dimensions. This descriptive quantitative study employed a cross-sectional approach and was conducted from November 5 to December 5, 2025, involving 114 respondents selected using consecutive sampling. Data were collected using a SERVQUAL questionnaire with a 1–4 Likert scale and analyzed univariately to obtain frequency distributions and mean scores. The results showed that the majority of patients were satisfied (52.6%). The reliability dimension had the highest mean score (3.246), while assurance had the lowest (2.917). The empathy dimension showed the highest polarization, with the largest number of respondents reporting less satisfied and dissatisfied responses (47 respondents; 18.86%), despite having a relatively high mean score (3.232). The Fisher–Freeman–Halton Exact Test (p < 0.001) and Spearman rho correlation test (r = 0.620) indicated a statistically significant and strong relationship between DIS and patient satisfaction. In conclusion, DIS at the Pharmacy Installation of Tanjungsiang Public Health Center in 2025 was predominantly categorized as complete, and patient satisfaction was mostly in the satisfied category. Abstrak. Kualitas pelayanan kesehatan, khususnya Pelayanan Informasi Obat (PIO), berperan penting dalam membentuk kepuasan dan loyalitas pasien di fasilitas pelayanan kesehatan tingkat pertama. Penelitian ini bertujuan untuk mengetahui kepuasan pasien terhadap PIO di Instalasi Farmasi Puskesmas Tanjungsiang, Kabupaten Subang berdasarkan lima dimensi SERVQUAL. Penelitian deskriptif kuantitatif dengan pendekatan cross-sectional ini dilaksanakan pada 5 November–5 Desember 2025 terhadap 114 responden yang dipilih menggunakan consecutive sampling. Data dikumpulkan menggunakan kuesioner SERVQUAL skala Likert 1–4 dan dianalisis secara univariat untuk memperoleh distribusi frekuensi dan nilai mean. Hasil menunjukkan kepuasan pasien mayoritas berada pada kategori puas (52,6%). Dimensi reliability memiliki nilai mean tertinggi (3,246), sedangkan assurance terendah (2,917). Dimensi empathy menunjukkan polarisasi tertinggi dengan jawaban kurang puas dan tidak puas terbanyak (47 responden; 18,86%) meskipun memiliki mean relatif tinggi (3,232). Uji Fisher–Freeman–Halton Exact Test (p < 0,001) dan korelasi Spearman rho (r = 0,620) menunjukkan hubungan signifikan kategori kuat antara PIO dan kepuasan pasien. Kesimpulannya, PIO di Instalasi Farmasi Puskesmas Tanjungsiang tahun 2025 mayoritas termasuk kategori lengkap dan kepuasan pasien mayoritas berada pada kategori puas.]]>
