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JENNIFER GRINCERI
NPI 1396325080
Hospitalist in Orange, CA

Active since April 08, 2021PECOS EnrolledAccepts Medicare Assignment
UC IRVINE HEALTH, 101 THE CITY DRIVE, CITY TOWER, STE 400, ORANGE, CA 92868(714) 456-5691 Get Directions Write a Review

NPPES record last updated: July 22, 2024. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jul 22, 2024, Jul 3, 2024, Apr 29, 2024 and 1 more (4 updates tracked since 2021).

About Jennifer Grinceri NPPES

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

JENNIFER GRINCERI (NPI 1396325080) is an individual hospitalist provider in Orange, California, licensed in California (A182787) and active in the NPI registry since April 2021. She is enrolled in Medicare PECOS and is a graduate of Un Of California, Riverside, School Of Medicine (2021).

NPPES Registry Identity

NPI1396325080
Entity TypeIndividualFemale
Primary Taxonomy208M00000X
Provider Legal NameJENNIFER GRINCERI
Location AddressUC IRVINE HEALTH, 101 THE CITY DRIVE, CITY TOWER, STE 400Orange, CA 92868
Mailing Address101 The City Dr SOrange, CA 92868-3201
Phone(714) 456-5691
Sole ProprietorNo
Medical School CMSUn Of California, Riverside, School Of MedicineGraduated 2021
Enumeration DateApril 8, 2021
Last NPPES UpdateJuly 22, 20244 updates tracked since enumeration
NPPES CertifiedJuly 22, 2024
✔ NPI 1396325080 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 · A182787
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 A182787 (CA)
UC IRVINE HEALTH, Orange, CA 92868
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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

Jennifer Grinceri 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 ID5799175592
PECOS Enrollment IDI20240614003312
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 Jennifer Grinceri 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
0.5 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 3

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.
68 services29 patients
Hospital discharge day management, 30 minutes or less 99238
Hospital discharge day management of 30 minutes or less includes finalizing your treatment, discussing your progress, and planning after-care at home. It ensures you're ready to leave the hospital and continue recovery safely.
22 services22 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.
21 services20 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.

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 Jennifer Grinceri's NPI number?

The NPI number for Jennifer Grinceri is 1396325080. It was assigned to this individual provider in the NPPES registry on April 8, 2021.

Where is Jennifer Grinceri located?

Jennifer Grinceri practices at Uc Irvine Health 101 The City Drive, City Tower, Ste 400, Orange, CA 92868. The listed phone number is (714) 456-5691.

What is Jennifer Grinceri's specialty?

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

Is Jennifer Grinceri enrolled in Medicare?

Yes. Jennifer Grinceri 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 organization bills Medicare for Jennifer Grinceri's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Jennifer Grinceri 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 Jennifer Grinceri'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 Jennifer Grinceri was last updated on July 22, 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.