# Gerard Diefes

> Gerard Diefes is a sleep medicine specialist in West Chester, Pennsylvania. Affiliated with Advocare Pulmonary & Sleep Specialists.

Canonical: https://findsleepdoctors.com/us/pa/west-chester/gerard-diefes-west-chester
Last updated: 2026-10-30

Sleep Medicine in West Chester, Pennsylvania (United States). Affiliated with Advocare Pulmonary & Sleep Specialists.

Coordinates: 40.0963°N 75.4033°W

## Practice details

| Field | Detail |
| --- | --- |
| Credentials | MD |
| Specialty | Sleep Medicine |
| Medical school | La Salle University in 1988 with a BA in Biology |
| Board certifications | Pulmonary, Critical Care, and Sleep Medicine |
| Experience | Since 1988 |
| Clinic / health centre | Advocare Pulmonary & Sleep Specialists |
| Address | 1593 McDaniel Dr |
| Postcode | 19380 |
| Phone | +1 484-999-2100 |
| Website | [https://www.advocarepulmonaryandsleepspecialists.com/provider/Dr-Gerard-J-Diefes-MD](https://www.advocarepulmonaryandsleepspecialists.com/provider/Dr-Gerard-J-Diefes-MD) |
| Listing verified from | advocarepulmonaryandsleepspecialists.com |
| Last verified | 2026-10-25 |

Information above was collected from the public source shown. Practice details can change — confirm with the practice before travelling or booking. Costs vary by treatment and insurer/health fund; no prices are published on this site.

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