National Provider Identifier Database

WILLIAM C FREY, MD – NPI #1427049345
Sleep Medicine

An Internist who practices Sleep Medicine is certified in the subspecialty of sleep medicine and specializes in the clinical assessment, physiologic testing, diagnosis, management and prevention of sleep and circadian rhythm disorders. Sleep specialists treat patients of any age and use multidisciplinary approaches. Disorders managed by sleep specialists include, but are not limited to, sleep related breathing disorders, insomnia, hypersomnias, circadian rhythm sleep disorders, parasomnias and sleep related movement disorders.


Contact Information

WILLIAM C FREY, MD
1100 WILFORD HALL LOOP
SAN ANTONIO, TX78236
Phone: 201-292-3322
Fax: 210-292-4741
Website:
Specialty Taxonomy Code
* Sleep Medicine 207RS0012X
Pulmonary Disease 207RP1001X

* Indicates primary specialty

NPI Profile & details for WILLIAM C FREY

NPI Number 1427049345
Credentials MD
Entity Individual
Enumeration date 10/31/2005
Last updated 03/21/2025 - More than a year ago
Sole proprietor1 No
Identifiers
  • TX License #: L4380
Hospital affiliation n/a

1 A sole proprietor/sole proprietorship is an individual, and as such, is eligible for a single NPI number. The sole proprietor must apply for the NPI number using his or her own Social Security Number (SSN), not an Employer Identification Number (EIN) even if he/she has an EIN.

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