WILLIAM VINCENT HARRITY M.D.
NPI 1598786444
Anesthesiology in Pasadena, CA

Q: What is William Harrity's NPI number?

The NPI number for William Harrity is 1598786444. It was assigned to this individual provider in the NPPES registry on July 23, 2006.

Q: What is William Harrity's specialty?

The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.

Q: When was this NPI record last updated?

The NPPES record for William Harrity was last updated on February 14, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since July 23, 2006PECOS EnrolledAccepts Medicare Assignment

100 W CALIFORNIA BLVD, PASADENA, CA 91105(626) 397-5000(626) 397-2912 Get Directions Write a Review

NPPES record last updated: February 14, 2008. Verified against the NPPES registry weekly; last sync: November 08, 2026.

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About William Vincent Harrity M.d. NPPES

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

WILLIAM VINCENT HARRITY M.D. (NPI 1598786444) is an individual anesthesiology provider in Pasadena, California, licensed in California (G58058) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS and is a graduate of Wayne State University School Of Medicine (1985).

NPPES Registry Identity

NPI1598786444

Entity TypeIndividualMale

Primary Taxonomy207L00000X

Provider Legal NameWILLIAM VINCENT HARRITYCredential: M.D.

Location Address100 W CALIFORNIA BLVDPasadena, CA 91105-3010

Mailing Address225 S Lake Ave, 535Pasadena, CA 91101-3005 · (626) 795-6596 · Fax (626) 795-8247

Phone(626) 397-5000

Fax(626) 397-2912

Sole ProprietorYes

Medical School CMSWayne State University School Of MedicineGraduated 1985

Enumeration DateJuly 23, 2006

Last NPPES UpdateFebruary 14, 2008

✔ NPI 1598786444 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians

Taxonomy Code207L00000X

License✔ Licensed in CA · G58058

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.

100 W CALIFORNIA BLVD, Pasadena, CA 91105

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Other Identifiers 5

Medicare ID-Type UnspecifiedWG58058DCA

Medicare UPINE63964

Medicare PINWG58058ECA

Medicaid00G580581CA

Other00G580581CA · Blue Shield

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

William Vincent Harrity M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID2365344165

PECOS Enrollment IDI20050420000563

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show William Harrity reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Pacific Valley Medical Group

0.3 mi

Anesthesiology

100 W CALIFORNIA BLVD
Pasadena, CA 91105

Reassigned Medicare billing, California enrollment
214 clinicians in this Medicare group

NPI 1851312862 (626) 397-5000

Hp Anesthesia Inc

8.4 mi

Anesthesiology

1300 N VERMONT AVE
Los Angeles, CA 90027

Reassigned Medicare billing, California enrollment
86 clinicians in this Medicare group

NPI 1992133474 (213) 413-3000

Socal Anesthesia Solutions, Inc

9.3 mi

Anesthesiology

1401 S GRAND AVE
Los Angeles, CA 90015

Reassigned Medicare billing, California enrollment
76 clinicians in this Medicare group

NPI 1407596901 (213) 742-5910

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 13

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Insertion of artery tube for blood sampling or infusion through skin 36620

This procedure involves placing a small tube into an artery, usually in the wrist or elbow, to collect blood samples or administer medication. It's done under local anesthesia and is a common, safe practice.

70 services70 patients

Ultrasonic guidance for blood vessel access 76937

Ultrasonic guidance for blood vessel access is a medical procedure where sound waves are used to create images of your blood vessels. This helps doctors to accurately locate and access the vessels for treatments or tests, ensuring safety and precision.

51 services43 patients

Ultrasonic guidance for needle placement 76942

Ultrasonic guidance for needle placement is a technique where sound waves create images that help accurately position the needle during procedures. This method ensures precision, minimizes discomfort, and increases safety.

30 services30 patients

Insertion of non-tunneled central venous tube for infusion (5 years or older) 36556

This procedure involves placing a thin tube into a large vein, usually in the neck or chest, to administer medication or fluids. It's done under local anesthesia to minimize discomfort. It's a standard, safe procedure for individuals aged 5 and above.

19 services19 patients

Anesthesia for procedure on heart and large blood vessels 00560

Anesthesia for heart and large blood vessel procedures involves using medications to block sensation, ensuring you don't feel pain during surgery. It can be general (you're asleep) or regional (part of your body is numbed). It helps ensure comfort and safety throughout the operation.

18 services18 patients

Injection of anesthetic agent and/or steroid into rib nerve 64420

This procedure involves injecting a numbing agent or steroid into a rib nerve to alleviate pain. The anesthetic numbs the area, reducing discomfort, while steroids can help reduce inflammation. It's generally safe and effective.

18 services18 patients

Other procedure on nervous system 64999

A procedure on the nervous system can involve various techniques to diagnose or treat conditions affecting your brain, spinal cord, or nerves. These can include surgeries, tests, or therapies. It's done by specialized doctors to help improve your neurological health.

17 services17 patients

Anesthesia for other procedure on upper abdomen 00790

Anesthesia for an upper abdomen procedure involves using medications to help you feel no pain during the operation. It can be general, where you're unconscious, or regional, where just the abdomen area is numbed. It ensures comfort and stillness, aiding a successful procedure.

15 services15 patients

Anesthesia for lens surgery 00142

Anesthesia for lens surgery involves administering medication to numb the eye area, ensuring you feel no pain during the procedure. This can be a local anesthetic (numbing only the eye area) or general (where you're asleep). It helps make the surgery comfortable and stress-free.

14 services14 patients

Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope 00731

This procedure involves the use of an endoscope, a flexible tube with a light and camera, to examine your esophagus, stomach, or upper small bowel. Anesthesia ensures you are comfortable and pain-free during the procedure.

14 services14 patients

Anesthesia for other procedure on large bowel using an endoscope 00811

Anesthesia for an endoscopic procedure on the large bowel ensures comfort and relaxation during the procedure. You'll be given medication to make you drowsy or asleep, eliminating any discomfort. The medication can be administered through a vein or inhaled.

14 services14 patients

Anesthesia for procedure on small and large bowel using an endoscope 00813

Anesthesia for an endoscopic procedure on the small and large bowel ensures comfort and relaxation during the procedure. It involves administering medicine to help you sleep or feel drowsy. This allows the doctor to examine your bowels without causing you discomfort or pain.

13 services13 patients

Injection of anesthetic agent and/or steroid into other nerve or branch 64450

This procedure involves injecting an anesthetic agent or steroid into a specific nerve or its branch. The goal is to relieve pain by reducing inflammation and numbing the area. It is commonly used for chronic pain management. The process is safe and usually quick.

12 services11 patients

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

SARAH STEPHENS NP

Nurse Practitioner (Acute Care)