PATRICIA JEAN GILLIS MD
NPI 1922058288
Emergency Medicine in Northridge, CA

Q: What is Patricia Gillis's NPI number?

The NPI number for Patricia Gillis is 1922058288. It was assigned to this individual provider in the NPPES registry on May 10, 2006. The provider is also known as Patricia J Boyatt MD.

Q: What is Patricia Gillis's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Q: When was this NPI record last updated?

The NPPES record for Patricia Gillis was last updated on December 12, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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 May 10, 2006PECOS EnrolledAccepts Medicare Assignment

18300 ROSCOE BLVD, NORTHRIDGE, CA 91328(818) 885-8500 Get Directions Write a Review

NPPES record last updated: December 12, 2013. Verified against the NPPES registry weekly; last sync: October 18, 2026.

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About Patricia Jean Gillis Md NPPES

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

PATRICIA JEAN GILLIS MD (NPI 1922058288) is an individual emergency medicine provider in Northridge, California, licensed in California (A73899) and active in the NPI registry since May 2006. She is enrolled in Medicare PECOS and is a graduate of Loma Linda University School Of Medicine (1999).

NPPES Registry Identity

NPI1922058288

Entity TypeIndividualFemale

Primary Taxonomy207P00000X

Provider Legal NamePATRICIA JEAN GILLISCredential: MD

Location Address18300 ROSCOE BLVDNorthridge, CA 91328

Mailing AddressPo Box 12410Westminster, CA 92685-1241 · (866) 234-5107

Phone(818) 885-8500

Sole ProprietorNo

Medical School CMSLoma Linda University School Of MedicineGraduated 1999

Enumeration DateMay 10, 2006

Last NPPES UpdateDecember 12, 2013

✔ NPI 1922058288 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207P00000X

License✔ Licensed in CA · A73899

Definition

An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.

18300 ROSCOE BLVD, Northridge, CA 91328

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Other Names 1

Former Name (1)Patricia J Boyatt Md

Other Identifiers 3

Medicare PINWA73899ACA

Medicare UPINH64945

Medicaid00A738990CA

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

Patricia Jean Gillis Md 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 ID5799686846

PECOS Enrollment IDI20040120000842

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 Patricia Gillis reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Ridgeline Emergency Physicians Medical Group, Inc.

Same address

Emergency Medicine

18300 ROSCOE BLVD
Northridge, CA 91325

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

NPI 1972953230 (330) 493-4443

Elia Health & Wellness Inc

4.8 mi

Health Service

6316 TOPANGA CANYON BLVD UNIT 406
Woodland Hills, CA 91367

Reassigned Medicare billing, California enrollment

NPI 1881443422 (805) 427-4231

Exer Medical Corporation

12 mi

Urgent Care

26777 AGOURA RD STE B4
Calabasas, CA 91302

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

NPI 1588901532 (818) 880-2225

Providence Facey Medical Foundation

13 mi

Internal Medicine

26357 MCBEAN PKWY
Valencia, CA 91355

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

NPI 1710031588 (661) 222-2600

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 16

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.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

211 services192 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

184 services168 patients

Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus 87426

An immunoassay test for severe acute respiratory syndrome coronavirus is a diagnostic tool. It uses your body's immune response to detect the presence of the virus. It involves taking a sample, usually from your nose or throat, which is then analyzed in a lab for signs of the virus.

136 services127 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

121 services121 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

105 services105 patients

Detection test by immunoassay with direct visual observation for influenza virus 87804

This is a test that identifies the influenza virus in your body. It works by using an immunoassay, a method that detects the presence of the virus through an immune response. The results are directly observable, making it a quick and efficient way to diagnose flu.

93 services47 patients

X-ray of chest, 2 views 71046

A chest X-ray, 2 views, is a quick, painless test that creates pictures of the structures inside your chest, such as your heart, lungs, and blood vessels. Two different angles are used to get a comprehensive view. This helps in diagnosing conditions like pneumonia, heart problems, or lung cancer.

71 services65 patients

Manual urinalysis test with examination using microscope, automated 81001

A manual urinalysis test with automated microscopic examination is a lab process that checks your urine for health indicators. It involves a machine scanning your sample to identify any abnormal elements, which can assist in diagnosing various conditions.

60 services57 patients

Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional 99211

This service involves an outpatient visit for established patients who may not need direct interaction with a healthcare professional. It could include reviewing test results, monitoring existing conditions, or adjusting treatment plans. It's typically done remotely, ensuring your comfort and convenience.

53 services49 patients

Detection test by immunoassay with direct visual observation for streptococcus, group a (strep) 87880

A detection test by immunoassay for Group A Strep is a quick procedure to identify a bacterial infection in your throat. It involves taking a throat swab and applying it to a test strip, which changes color if Strep bacteria are present.

34 services34 patients

Automated urinalysis test 81003

An automated urinalysis test is a routine examination that checks your urine for various substances. It can help identify potential health issues such as kidney problems or diabetes. The test uses a machine to analyze a small urine sample, providing quick and accurate results.

27 services25 patients

Detection test by immunoassay with direct visual observation for respiratory syncytial virus 87807

This is a test to identify the respiratory syncytial virus, a common cause of lung and respiratory tract infections. It uses immunoassay, a method that detects the virus through a reaction between the virus and specific antibodies. The result is visually observed.

24 services24 patients

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report 93000

An electrocardiogram (ECG) is a non-invasive test that records your heart's electrical activity. Using 12 leads attached to your body, it captures data to help identify heart conditions. A doctor interprets the results and provides a report.

20 services20 patients

Injection of drug or substance under skin or into muscle 96372

This procedure involves administering medication directly under the skin or into a muscle. A small needle is used to inject the drug, allowing it to be absorbed quickly into the bloodstream. It's a common method for delivering a variety of medications.

19 services15 patients

Blood test, comprehensive group of blood chemicals 80053

A comprehensive group of blood chemicals test, also known as a comprehensive metabolic panel, is a blood test that measures your sugar level, electrolyte and fluid balance, kidney function, and liver function. This helps to check your body's overall health.

15 services15 patients

Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count 85025

A Complete Blood Cell Count is a common test that measures various components of the blood, including red cells (carry oxygen), white cells (fight infection), and platelets (help blood clot). An automated test ensures accuracy. The differential count provides detailed information about white cell types.

14 services13 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 91328 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$96.36 typical visit price

range $62.96 – $187.60

Typical copayment $24.09 (range $15.74 – $46.90)

Most-billed visit code 99203

Established Patient

$109.96 typical visit price

range $20.84 – $153.61

Typical copayment $27.49 (range $5.21 – $38.40)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

MATTHEW P BEATTY MD

Emergency Medicine

18300 ROSCOE BLVD
NORTHRIDGE, CA 91328

Los Angeles County (818) 885-8500

STEVEN L COLE MD

Emergency Medicine

18300 ROSCOE BLVD
NORTHRIDGE, CA 91328

Los Angeles County (818) 885-8500

NORTHRIDGE HOSPTIAL MEDICAL CENTER

General Acute Care Hospital

18300 ROSCOE BLVD, NORTHRIDGE HOSPITAL MEDICAL CENTER
NORTHRIDGE, CA 91328

Los Angeles County (818) 885-8500

NORTHRIDGE TRAUMA SURGEONS INC A MEDICAL CORPORATION

Surgery

18300 ROSCOE BLVD, NORTHRIDGE TRAUMA SURGEONS INC
NORTHRIDGE, CA 91328

Los Angeles County (818) 885-8500

GRACE KIM NURSE PRACTITIONER

Nurse Practitioner (Family)

18300 ROSCOE BLVD
NORTHRIDGE, CA 91328

Los Angeles County (818) 885-8500

SHANNON M MCFARLAND PA

Emergency Medicine

18300 ROSCOE BLVD
NORTHRIDGE, CA 91328

Los Angeles County (818) 885-8500

ALFRED M PASCUAL DO

Emergency Medicine

18300 ROSCOE BLVD
NORTHRIDGE, CA 91328

Los Angeles County (818) 885-8500

DANIEL M KIJNER MD

Emergency Medicine

18300 ROSCOE BLVD
NORTHRIDGE, CA 91328

Los Angeles County (818) 885-8500

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Patricia Gillis's NPI number?

The NPI number for Patricia Gillis is 1922058288. It was assigned to this individual provider in the NPPES registry on May 10, 2006. The provider is also known as Patricia J Boyatt MD.

Where is Patricia Gillis located?

Patricia Gillis practices at 18300 Roscoe Blvd, Northridge, CA 91328. The listed phone number is (818) 885-8500.

What is Patricia Gillis's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Is Patricia Gillis enrolled in Medicare?

Yes. Patricia Gillis is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Patricia Gillis's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Patricia Gillis reassigns Medicare benefits to 4 organizations: Ridgeline Emergency Physicians Medical Group, Inc. (Northridge, CA), Elia Health & Wellness Inc (Woodland Hills, CA), Exer Medical Corporation (Calabasas, CA) and Providence Facey Medical Foundation (Valencia, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Patricia Gillis's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Patricia Gillis was last updated on December 12, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.