Physician Profile
Matthew U. Janssen, M.D..
Unclaimed ProfileAbout Dr. Janssen
Matthew U. Janssen, M.D.. is a healthcare provider in Pomona, CA specializing in hospice & palliative medicine. Matthew trained at University of California, Geffen School of Medicine, graduating in 2002. Matthew is also listed as specializing in emergency medicine. Medicare claims data shows Matthew provided 934 services to 633 patients. The services billed most often include subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes, advance care planning, first 30 minutes, and initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (909) 865-9600
- Email not available
Practice Locations
1798 N GAREY AVE
Pomona, CA 91767
Procedures Most Often Billed to Medicare
934 services · 633 patients · 4 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | Office visit | 99232 |
350 | More than most peers in Hospice & Palliative Medicine |
| Advance care planning, first 30 minutes | Office visit | 99497 |
201 | More than most peers in Hospice & Palliative Medicine |
| Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | Office visit | 99223 |
199 | More than most peers in Hospice & Palliative Medicine |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | Office visit | 99233 |
184 | More often than most peers in Hospice & Palliative Medicine |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other hospice & palliative medicines at this location 1
Same specialty, same street address — most likely the same department or group.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 15 related providers in 2 groups
Trained at University of California, Geffen School of Medicine 7
Other providers in the same specialty who trained at the same institution.
Class of 2002 at University of California, Geffen School of Medicine 8
Providers who graduated from the same medical school in the same year.
Common questions
What does Matthew U. Janssen specialize in?
Matthew U. Janssen is a hospice & palliative medicine in Pomona, CA. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where is Matthew U. Janssen located?
Matthew U. Janssen is listed at 1798 N Garey Ave, Pomona, CA 91767. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Matthew U. Janssen's phone number?
The number on file is (909) 865-9600. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Matthew U. Janssen?
Matthew U. Janssen's National Provider Identifier is 1497857023. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Matthew U. Janssen train?
Matthew U. Janssen attended University of California, Geffen School of Medicine, graduating in 2002. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Matthew U. Janssen have?
Matthew U. Janssen has 24 years experience. Calculated from a graduation year of 2002, reported in the CMS National Downloadable File.
CMS public data
What does Matthew U. Janssen do most often?
According to Medicare billing data, Matthew U. Janssen the Medicare record under this individual NPI shows mainly office visits and diagnostic testing. Hospital-based physicians usually have their procedural work billed by the facility rather than under their own number, so this is a floor on their practice, not a description of it. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Matthew U. Janssen's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Matthew U. Janssen. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.