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JONATHAN GAU MD
NPI 1730765603
Hospitalist in Orange, CA

Active since March 22, 2021PECOS Enrolled
101 THE CITY DR S STE 400, ORANGE, CA 92868(714) 456-5691 Get Directions Write a Review

NPPES record last updated: July 8, 2024. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jul 8, 2024, Apr 18, 2024, Apr 7, 2021 and 1 more (4 updates tracked since 2021).

About Jonathan Gau Md NPPES

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

JONATHAN GAU MD (NPI 1730765603) is an individual hospitalist provider in Orange, California, licensed in California (A181959) and active in the NPI registry since March 2021. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1730765603
Entity TypeIndividualMale
Primary Taxonomy208M00000X
Provider Legal NameJONATHAN GAUCredential: MD
Location Address101 THE CITY DR S STE 400Orange, CA 92868-3201
Mailing Address101 The City Dr SOrange, CA 92868-3201
Phone(714) 456-5691
Sole ProprietorNo
Enumeration DateMarch 22, 2021
Last NPPES UpdateJuly 8, 20244 updates tracked since enumeration
NPPES CertifiedJuly 8, 2024
✔ NPI 1730765603 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyHospitalistAllopathic & Osteopathic Physicians
Taxonomy Code208M00000X
License✔ Licensed in CA · A181959
Definition
Hospitalists are physicians whose primary professional focus is the general medical care of hospitalized patients. Their activities include patient care, teaching, research, and leadership related to Hospital Medicine. The term 'hospitalist' refers to physicians whose practice emphasizes providing care for hospitalized patients.
Also ListedInternal MedicineTaxonomy 207R00000X · License 181959 (CA)
101 THE CITY DR S STE 400, Orange, CA 92868
Open in Google Maps ↗

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Jonathan Gau Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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 Reassignment

Medicare enrollment records show Jonathan Gau reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

The Regents Of The University Of California-Irvine
0.3 mi
Hospitalist
101 THE CITY DR S BLDG 1
Orange, CA 92868
  • Reassigned Medicare billing, California enrollment
  • 250 clinicians in this Medicare group
NPI 1154479723 (714) 456-7002

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 4

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.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233
Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.
104 services34 patients
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
22 services22 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
17 services12 patients
Hospital discharge day management, more than 30 minutes 99239
Hospital discharge day management over 30 minutes involves a detailed process to ensure a smooth transition from hospital to home. It includes final examinations, discussion of your hospital stay, post-discharge instructions, and coordinating follow-up care.
16 services16 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92868 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
$142.39 typical visit price
range $62.96 – $187.60
Typical copayment $35.59 (range $15.74 – $46.90)
Most-billed visit code 99204
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.

BRIAN DIEP MD
Student in an Organized Health Care Education/Training Program
101 THE CITY DR S STE 400
ORANGE, CA 92868
Orange County (714) 456-5691
ANISH SAI KOLAN
Student in an Organized Health Care Education/Training Program
101 THE CITY DR S STE 400
ORANGE, CA 92868
Orange County (714) 456-5691
MICHELLE T NGUYEN
Student in an Organized Health Care Education/Training Program
101 THE CITY DR S STE 400
ORANGE, CA 92868
Orange County (714) 456-5691
DR. JOSEPH CARTON MD
Student in an Organized Health Care Education/Training Program
101 THE CITY DR S STE 400
ORANGE, CA 92868
Orange County (714) 456-5691
ERICA SHIN
Student in an Organized Health Care Education/Training Program
101 THE CITY DR S STE 400
ORANGE, CA 92868
Orange County (714) 456-5691
TIMOTHY CHANG
Student in an Organized Health Care Education/Training Program
101 THE CITY DR S STE 400
ORANGE, CA 92868
Orange County (714) 456-5691
SHANT ABRHAMIAN
Student in an Organized Health Care Education/Training Program
101 THE CITY DR S STE 400
ORANGE, CA 92868
Orange County (714) 456-5691
MICHELLE M NGUYEN
Psychiatry & Neurology (Neurology)
101 THE CITY DR S STE 400
ORANGE, CA 92868
Orange County (714) 456-5691

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 Jonathan Gau's NPI number?

The NPI number for Jonathan Gau is 1730765603. It was assigned to this individual provider in the NPPES registry on March 22, 2021.

Where is Jonathan Gau located?

Jonathan Gau practices at 101 The City Dr S Ste 400, Orange, CA 92868. The listed phone number is (714) 456-5691.

What is Jonathan Gau's specialty?

The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.

Is Jonathan Gau enrolled in Medicare?

Yes. Jonathan Gau is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Jonathan Gau's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Jonathan Gau reassigns Medicare benefits to The Regents Of The University Of California-Irvine (Orange, CA). The 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 Jonathan Gau'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 Jonathan Gau was last updated on July 8, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.