William John Marks is a Stanford, California based neurologist with 34 years of experience in Epilepsy Treatment. He completed his graduation from Johns Hopkins University School Of Medicine in 1991. He is also affiliated with hospitals like He accepts the Medicare-approved amount. Patients will not be billed for any more than the Medicare deductible and coinsurance. Active license number of William John Marks is A51191 for Neurology in California. His current practice location is 300 Pasteur Dr, Stanford. Patients can reach him at 650-723-4000. William John Marks is MD in Epilepsy Treatment and his NPI number (Unique professional ID assigned by NPPES) is 1053341693.
William John Marks is focused on the diagnosis and treatment of patients with epilepsy, including new-onset, medically refractory epilepsy, psychogenic nonepileptic seizures, and epilepsy in special populations (the elderly, women, patients with co-morbidities). Epilepsy is a multidisciplinary field that provides comprehensive care of the patient.
Complete Profile:
William John Marks speciality, credentials, practice address, contact phone number and fax are as below.
Patients can call on the below given phone number for appointment.
| Name: | William John Marks |
| Specialization: | Epilepsy Treatment |
| Gender: | Male |
| Credentials: | MD |
| Experience: | 34+ years |
| Medical School Attended: | Johns Hopkins University School Of Medicine |
| Graduation Year: | 1991 |
| Accepts Medicare Assignment: | Yes |
| Practice Address: | 300 Pasteur Dr, Stanford,
California, 94305-2200 |
| Phone: | 650-723-4000 |
Professional Identification Codes:
NPI number stands for National Provider Identifier which is a unique 10-digit identification number issued to health care providers in the United States by the Centers for Medicare and Medicaid Services (CMS).
NPI details are as mentioned below.
| PAC ID: | 9133270150 |
| Enrollment ID: | I20090701000577 |
| NPI Number: | 1053341693 |
| NPI Enumeration Date: | 03 Jul, 2006 |
| NPI Last Update On: | 08 Nov, 2023 |
Medical Licenses:
Doctors can have one or more medical licenses for different specialities in the same state or different states. Related medical licenses for William John Marks are as mentioned below.
| License Number | Specialization | State | Status | |
| A51191 | Neurology | California | Primary | |
| A51191 | Epilepsy Treatment | California | Secondary | |
| A51191 | Clinical Neurophysiology | California | Secondary | |
Hospital Affiliation:
Surgeons are affiliated to many hospitals whom they worked with in the past or are presently working with. One surgeon can be affiliated to four to five hospitals at a time.
| Hospital Name (CCN) | State | Hospital Type |
| (050441) | Stanford, CA | Acute Care Hospital |
Group Practice:
Group practices are practice of medicine by a group of physicians who share their premises and other resources. Following list states all the group name
with which William John Marks is associated with along with the number of members in that group.
| Organization Name (Group PAC ID) | Members |
| Stanford Health Care (6709797491) | 2316 |
Other Medical Identifiers:
Other legacy medical identifiers associated with William John Marks such as Medicaid, Medicare PIN, NSC, UPIN etc. are mentioned as below.
| Identifier | Type | State | Issuer |
| 00A511910 | Medicaid | California | |
Business Mailing Address:
Business mailing address can be used for mailing purpose only, for visiting purpose patients need to refer above mentioned address.
| Address: | William John Marks
300 Pasteur Dr,
Stanford, California |
| Zip: | 94305-2200 |
| Phone Number: | 650-723-4000 |
Patients can reach William John Marks at
300 Pasteur Dr, Stanford, California or can
call to book an appointment on 650-723-4000.
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Data of this site is collected from Medicare & Medicaid Services (CMS) and NPPES. Last updated on 08 December, 2025.