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DR. MATTHEW ULYSSES JANSSEN M.D..
NPI 1497857023
Internal Medicine - Hospice and Palliative Medicine in Pomona, CA

Active since September 03, 2006PECOS EnrolledAccepts Medicare Assignment
75/100
CMS Quality Rating
1798 N GAREY AVE, POMONA, CA 91767(909) 865-9600 Get Directions Write a Review

NPPES record last updated: September 17, 2024. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Sep 17, 2024, Nov 10, 2021, Nov 1, 2018 and 1 more (4 updates tracked since 2017).

About Dr. Matthew Ulysses Janssen M.d.. NPPES

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

DR. MATTHEW ULYSSES JANSSEN M.D.. (NPI 1497857023) is an individual hospice and palliative medicine provider in Pomona, California, licensed in California (A86129) and active in the NPI registry since September 2006. He is enrolled in Medicare PECOS and is a graduate of University Of California, Geffen School Of Medicine (2002).

NPPES Registry Identity

NPI1497857023
Entity TypeIndividualMale
Primary Taxonomy207RH0002X
Provider Legal NameDR. MATTHEW ULYSSES JANSSENCredential: M.D..
Location Address1798 N GAREY AVEPomona, CA 91767-2918
Mailing Address2100 Powell St, Suite 900Emeryville, CA 94608-1826 · (510) 350-2600 · Fax (510) 879-9100
Phone(909) 865-9600
Sole ProprietorNo
Medical School CMSUniversity Of California, Geffen School Of MedicineGraduated 2002
Enumeration DateSeptember 3, 2006
Last NPPES UpdateSeptember 17, 20244 updates tracked since enumeration
NPPES CertifiedSeptember 17, 2024
✔ NPI 1497857023 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyInternal Medicine · Hospice and Palliative MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207RH0002X
License✔ Licensed in CA · A86129
Definition
An internal medicine physician with special knowledge and skills to prevent and relieve the suffering experienced by patients with life-limiting illnesses. This specialist works with an interdisciplinary hospice or palliative care team to maximize quality of life while addressing physical, psychological, social and spiritual needs of both patient and family throughout the course of the disease, through the dying process, and beyond for the family. This specialist has expertise in the assessment of patients with advanced disease; the relief of distressing symptoms; the coordination of interdisciplinary patient and family-centered care in diverse venues; the use of specialized care systems including hospice; the management of the imminently dying patient; and legal and ethical decision making in end-of-life care.
Also ListedEmergency Medicine · Hospice and Palliative MedicineTaxonomy 207PH0002X · License A86129 (CA)
Also ListedHospitalistTaxonomy 208M00000X · License A86129 (CA)
1798 N GAREY AVE, Pomona, CA 91767
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Other Identifiers 1

Medicaid00A861290CA

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

Dr. Matthew Ulysses Janssen 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 ID8325084858
PECOS Enrollment IDI20050706000409
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

5

Medicare enrollment records show Matthew Janssen reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Cep America - California
Same address
Emergency Medicine
1798 N. GAREY AVENUE
Pomona, CA 91767
  • Reassigned Medicare billing, California enrollment
  • Also billed through NPI 1386750578 (California)
  • 1,204 clinicians in this Medicare group
NPI 1740235258 (909) 865-9500
Albion Medical Partners Of California West P C
23 mi
Internal Medicine
12900 PARK PLAZA DR, STE 700, MS-7110
Cerritos, CA 90703
  • Reassigned Medicare billing, California enrollment
  • 235 clinicians in this Medicare group
NPI 1073110607 (562) 622-2800
Memorialcare Medical Foundation
28 mi
Clinic/Center
17360 BROOKHURST ST
Fountain Valley, CA 92708
  • Reassigned Medicare billing, California enrollment
  • 948 clinicians in this Medicare group
NPI 1205167350 (877) 696-3622
California Emergency Physicians Medical Group, A Professional Corp.
28 mi
Hospice and Palliative Medicine
1560 E CHEVY CHASE DR STE 355
Glendale, CA 91206
  • Reassigned Medicare billing, California enrollment
  • 131 clinicians in this Medicare group
NPI 1881315091 (747) 212-3441
Carelon Medical Partners, PC
1,758 mi
Hospice and Palliative Medicine
22 CENTURY BLVD STE 220
Nashville, TN 37214
  • Reassigned Medicare billing, Oregon enrollment
  • 12 clinicians in this Medicare group
NPI 1124443403 (615) 454-9850

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 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.
350 services157 patients
Advance care planning, first 30 minutes 99497
Advance care planning is a process where you discuss your healthcare preferences with your doctor. This conversation, lasting up to 30 minutes, helps ensure your wishes are respected if you're unable to communicate them in the future. It's about your care, your way.
201 services187 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.
199 services194 patients
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.
184 services95 patients

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

75/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice

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.

MARIA CONSUELO CASTELAN RD
Dietitian, Registered
1798 N GAREY AVE
POMONA, CA 91767
Los Angeles County (909) 528-5046
HSIENHWA CHOU RD
Dietitian, Registered
1798 N GAREY AVE
POMONA, CA 91767
Los Angeles County (909) 860-7799
MR. CYRUS QUEROL P.A.
Physician Assistant
1798 N GAREY AVE
POMONA, CA 91767
Los Angeles County (510) 350-2698
VESTA NICOLE GUIV PHARMD
Pharmacist
1798 N GAREY AVE
POMONA, CA 91767
Los Angeles County (909) 865-9500
JENJIRA SORRECA DO RD
Dietitian, Registered
1798 N GAREY AVE
POMONA, CA 91767
Los Angeles County (909) 865-9501
VICTORIA SUSAN CHIDBOY RN
Registered Nurse (Critical Care Medicine)
1798 N GAREY AVE
POMONA, CA 91767
Los Angeles County (909) 865-9500
MARTI JO KUNISHIMA PT
Physical Therapist
1798 N GAREY AVE
POMONA, CA 91767
Los Angeles County (909) 865-9810
RACHEL ANN CHATER LEA
Physician Assistant
1798 N GAREY AVE
POMONA, CA 91767
Los Angeles County (949) 973-3290

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 Matthew Janssen's NPI number?

The NPI number for Matthew Janssen is 1497857023. It was assigned to this individual provider in the NPPES registry on September 3, 2006.

Where is Matthew Janssen located?

Matthew Janssen practices at 1798 N Garey Ave, Pomona, CA 91767. The listed phone number is (909) 865-9600.

What is Matthew Janssen's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hospice and Palliative Medicine, with taxonomy code 207RH0002X.

Is Matthew Janssen enrolled in Medicare?

Yes. Matthew Janssen 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 Matthew Janssen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Matthew Janssen reassigns Medicare benefits to 5 organizations: Cep America - California (Pomona, CA), Albion Medical Partners Of California West P C (Cerritos, CA), Memorialcare Medical Foundation (Fountain Valley, CA), California Emergency Physicians Medical Group, A Professional Corp. (Glendale, CA) and Carelon Medical Partners, PC (Nashville, TN). 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 Matthew Janssen'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 Matthew Janssen was last updated on September 17, 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.