Matthew Janssen, M.D..
Hospice and Palliative Medicine (Emergency Medicine) Physician · Pomona, CA
Matthew Janssen, M.D.. is a hospice and palliative medicine (emergency 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 Janssen
- Credential
- M.D..
- Primary taxonomy
- Hospice and Palliative Medicine (Emergency Medicine) Physician 207PH0002X
- 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
- Entity
- Type 1 · individual
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.Student in an Organized Health Care Education/Training Program1497011902
- Fran Allas, OTR/LNeurorehabilitation Occupational Therapist1467081828
- Yvette Ambroze, FNPFamily Nurse Practitioner1336616879
- Arjun Bakshi, DOEmergency Medicine Physician1659968303
Verify Matthew 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
96% fewer Medicare Part D claims than the average hospice and palliative medicine (emergency medicine) physician in 2024
12 Medicare Part D claims, against an average of 300 among the 116 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 Medicare quality 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).
2 hospital and facility affiliations
- California Emergency Physicians Medical Group A Professional CorpFountain Valley, CA
- Memorialcare Medical FoundationFountain Valley, CA
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Hospice and Palliative Medicine (Emergency Medicine) Physician providers in California
There are 24 hospice and palliative medicine (emergency medicine) physician records in California.
Other hospice and palliative medicine (emergency medicine) physician records in California
- Yomi Adeyemi, M.D.La Quinta, CA1174523518
- Catherine Antonuk, MDTorrance, CA1497286256
- John Benjamin Arevalo, MD, MBASan Francisco, CA1629561170
- Austin Causey, MDOakland, CA1659735041
- Alice Chang, DOOrange, CA1760064216
- Monica Chowdary, MDHarbor City, CA1275161655
- Fredric Gough, MDFairfield, CA1689897019
- Suh Lee, M.D.Los Angeles, CA1619362233
- Cynthia Mackey, D.O.Lancaster, CA1598966053
- Ruth Ochoa, M.D.Oakland, CA1508028481
Common questions
What is Matthew Janssen, M.D..'s NPI number?
Matthew 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 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 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 Janssen, M.D.. prescribe under Medicare Part D?
In 2024, Matthew Janssen, M.D.. had 12 Medicare Part D claims; the average among hospice and palliative medicine (emergency medicine) physician prescribers was 300. Part D covers Medicare prescriptions only.
What is Matthew Janssen, M.D..'s Medicare quality 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), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.