DR. PATRICK HALLIDAY MD
NPI 1659908242
Anesthesiology in Santa Clara, CA

Active since March 24, 2020PECOS EnrolledAccepts Medicare Assignment
700 LAWRENCE EXPY, SANTA CLARA, CA 95051(408) 851-1000 Get Directions Write a Review

NPPES record last updated: October 12, 2025. Verified against the NPPES registry weekly; last sync: July 19, 2026.

Record update history: Oct 12, 2025, Mar 24, 2020 (2 updates tracked since 2020).

About Dr. Patrick Halliday Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. PATRICK HALLIDAY MD (NPI 1659908242) is an individual anesthesiology provider in Santa Clara, California, licensed in California (A197179) and active in the NPI registry since March 2020. He is enrolled in Medicare PECOS and is a graduate of University Of California, San Francisco School Of Medicine (2020).

NPPES Registry Identity

NPI1659908242
Entity TypeIndividualMale
Primary Taxonomy207L00000X
Provider Legal NameDR. PATRICK HALLIDAYCredential: MD
Location Address700 LAWRENCE EXPYSanta Clara, CA 95051-5173
Mailing Address700 Lawrence ExpySanta Clara, CA 95051-5173 · (408) 851-1000
Sole ProprietorNo
Medical School CMSUniversity Of California, San Francisco School Of MedicineGraduated 2020
Enumeration DateMarch 24, 2020
Last NPPES UpdateOctober 12, 20252 updates tracked since enumeration
NPPES CertifiedOctober 12, 2025
NPI 1659908242 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
License Licensed in CA · A197179
Definition

An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.

700 LAWRENCE EXPY, Santa Clara, CA 95051

Medicare Participation & PECOS Enrollment Status

Patrick Halliday is registered with Medicare and accepts claims assignment, this means the provider accepts the approved amount for the cost of rendered services as full payment. Participating providers may not charge beneficiaries more than the approved amount for their services. Please keep in mind that beneficiaries still have to pay a coinsurance or copayment amount for a visit or service.

Patrick Halliday is enrolled in PECOS and is eligible to order or refer health care services for Medicare patients. The provider is eligible to order or refer: Part B Clinical Laboratory and Imaging, Durable Medical Equipment (DME), a Home Health Agency (HHA) and Power Mobility Devices.

What is PECOS?
PECOS is the online Medicare enrollment management system or Provider, Enrollment, Chain and Ownership System. The PECOS system is a database of providers who have registered with CMS as providers or suppliers. PECOS is the primary source of information about verified Medicare professionals. Providers that want to participate in this program need to enroll in PECOS with their NPI number to avoid denied claims.

  • Is the provider registered in PECOS? Yes

  • PECOS PAC ID: 6204326796

    What is the PECOS Associate Control ID?
    A PAC ID is a unique 10-digit number assigned to an individual or organization healthcare provider in PECOS. The PAC ID is used to link together all the provider information, like tax identification numbers and organizational names. A PAC ID can be connected to multiple Enrollment IDs if an individual or organization has enrolled in PECOS more than once.

  • PECOS Enrollment ID: I20251104001087

    What is the Provider Enrollment ID?
    The Enrollment ID is a unique alphanumeric 15-digit code assigned to each new provider's PECOS enrollment application. The Enrollment ID is used to link together all the provider enrollment information like enrollment type, state, provider specialty, and reassignment of benefits.

  • Accepts Medicare Assignment? Yes

    What does it mean "accepts medicare assignment"?
    When a provider accepts Medicare assignment, the provider agrees to be paid directly by Medicare and to accept the payment amount approved by Medicare. Additionally, the provider agrees to not bill patients for more than the Medicare deductible and coinsurance amounts.
    A provider who doesn't accept assignment may charge you up to 15% over the Medicare-approved amount. This is known as the limiting charge. You may have to pay this amount, or it may be covered by another insurer.

  • Eligible to Order or Refer Part B Clinical Laboratory and Imaging: Yes

  • Eligible to Order or Refer Durable Medical Equipment (DMEPOS): Yes

  • Eligible to Order or Refer a Home Health Agency (HHA): Yes

  • Eligible to Order or Refer Power Mobility Devices: Yes

Reviews for DR. PATRICK HALLIDAY MD

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Other Providers at the Same Location


The following 20 providers are registered at the same or a nearby location.

Physician Assistant
700 LAWRENCE EXPY
SANTA CLARA, CA 95051
Nurse Anesthetist, Certified Registered
700 LAWRENCE EXPY
SANTA CLARA, CA 95051
Nurse Anesthetist, Certified Registered
700 LAWRENCE EXPY
SANTA CLARA, CA 95051
Nurse Anesthetist, Certified Registered
700 LAWRENCE EXPY
SANTA CLARA, CA 95051
Dietitian, Registered
700 LAWRENCE EXPY, BASEMENT, NUTRITION SVCS -DEPT B08
SANTA CLARA, CA 95051
Nurse Anesthetist, Certified Registered
700 LAWRENCE EXPY
SANTA CLARA, CA 95051
Nurse Anesthetist, Certified Registered
700 LAWRENCE EXPY
SANTA CLARA, CA 95051
Nurse Anesthetist, Certified Registered
700 LAWRENCE EXPY
SANTA CLARA, CA 95051
Nurse Anesthetist, Certified Registered
700 LAWRENCE EXPY
SANTA CLARA, CA 95051
Pharmacist
700 LAWRENCE EXPY
SANTA CLARA, CA 95051
Physical Therapist
700 LAWRENCE EXPY
SANTA CLARA, CA 95051
Pharmacist
700 LAWRENCE EXPY
SANTA CLARA, CA 95051
Pharmacist
700 LAWRENCE EXPY
SANTA CLARA, CA 95051
Physical Therapist
700 LAWRENCE EXPY
SANTA CLARA, CA 95051
Dietitian, Registered
700 LAWRENCE EXPY
SANTA CLARA, CA 95051
General Acute Care Hospital
700 LAWRENCE EXPY
SANTA CLARA, CA 95051
Dietitian, Registered
700 LAWRENCE EXPY
SANTA CLARA, CA 95051
Pharmacist
700 LAWRENCE EXPY
SANTA CLARA, CA 95051
Registered Nurse (Neonatal Intensive Care)
700 LAWRENCE EXPY
SANTA CLARA, CA 95051
Pharmacist (Oncology)
700 LAWRENCE EXPY
SANTA CLARA, CA 95051

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1659908242, enumerated as an "individual" on March 24, 2020.

The provider is located at 700 LAWRENCE EXPY SANTA CLARA, CA 95051 and the phone number is (408) 851-1000.

Anesthesiology with taxonomy code 207L00000X.