Matthew Ulysses Janssen, M.D..
Hospice and Palliative Medicine (Internal Medicine) Physician · Pomona, CA
Matthew Ulysses Janssen, M.D.. is a hospice and palliative medicine (internal medicine) physician with a practice address in Pomona, California, and NPI 1497857023, issued on Sep 3, 2006. Check the license (California A86129, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Matthew Ulysses Janssen
- Credential
- M.D..
- Primary taxonomy
- Hospice and Palliative Medicine (Internal Medicine) Physician 207RH0002X
- License number
- A86129 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1798 N Garey Ave, Pomona, CA 91767
- Phone
- (909) 865-9600
- Enumerated
- Sep 3, 2006
- Record last updated
- Sep 17, 2024
- Medicaid ID
- 00A861290 CA
- Medicare enrollment
- Enrolled (PECOS I20050706000409); accepts Medicare assignment
- Medical or professional school
- University Of California, Geffen School Of Medicine, 2002
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest hospice and palliative medicine (internal medicine) physician records → All 260 in California → Look up another NPI →
Also registered at 1798 N Garey Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Monique AbdallaRegistered Nurse1871398297
- Brent Abutin, PTAPhysical Therapy Assistant1144728023
- Anna Adongo, M.D.Anesthesiology Physician1497011902
- Fran Allas, OTR/LNeurorehabilitation Occupational Therapist1467081828
- Yvette Ambroze, FNPFamily Nurse Practitioner1336616879
- Arjun Bakshi, DOEmergency Medicine Physician1659968303
Verify Matthew Ulysses Janssen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A86129Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average hospice and palliative medicine (internal medicine) physician in 2024
12 Medicare Part D claims, against an average of 741 among the 1,607 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through 2 group practices
- California Emergency Physicians Medical Group A Professional CorpFountain Valley, CA
- Memorialcare Medical FoundationFountain Valley, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Matthew Ulysses Janssen among 260 hospice and palliative medicine (internal medicine) physician records in California
Matthew Ulysses Janssen, M.D.. is one of 260 hospice and palliative medicine (internal medicine) physician records with a practice address in California. 87% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 2% of them.
- NPI issued2006 · 2% of these records are older, 75% newer
- In a Medicare fileYes · 87% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated2002 · median 2010 among the 193 with a school on file
- Record last updated2024 · 38% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0002X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hospice and Palliative Medicine (Internal Medicine) Physician providers in California
There are 260 hospice and palliative medicine (internal medicine) physician records in California.
All 260 in California → Every provider in Pomona → Hospice and Palliative Medicine (Internal Medicine) Physician nationwide →
The 8 hospice and palliative medicine (internal medicine) physician records with the nearest ZIP codes
- Steven Floum, M.D.Pomona, CA 917671194755660
- Mahmood Khan, M.D.Pomona, CA 917671396759536
- Patrick Joseph Alix, MDGlendora, CA 917401457352783
- Rajiv Bhuva, M.D.Azusa, CA 917021821148941
- Jessica Cruz WhitleyChula Vista, CA 919101841653094
- Annette Vollrath, MDChula Vista, CA 919131992884415
- Sung ParkNorth Hollywood, CA 916021700537305
- Dorreen Danesh, MDEl Cajon, CA 920201902432826
Common questions
What is Matthew Ulysses Janssen, M.D..'s NPI number?
Matthew Ulysses Janssen, M.D..'s National Provider Identifier (NPI) is 1497857023, issued on Sep 3, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Matthew Ulysses Janssen, M.D.. located?
The NPPES record lists a practice address at 1798 N Garey Ave, Pomona, CA, 91767. Phone: (909) 865-9600. Providers update this record themselves, so call before visiting.
How can I verify Matthew Ulysses Janssen, M.D..'s license?
NPPES lists California license number A86129, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Matthew Ulysses Janssen, M.D.. prescribe under Medicare Part D?
In 2024, Matthew Ulysses Janssen, M.D.. had 12 Medicare Part D claims; the average among hospice and palliative medicine (internal medicine) physician prescribers was 741. Part D covers Medicare prescriptions only.
What is Matthew Ulysses Janssen, M.D..'s MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.