Physician Profile
Unclaimed ProfileAbout JANZEN
Mark Laverne Janzen, MD practises vascular surgery in Riverside, CA. Mark is also listed as specialising in surgery and trauma surgery. Medicare claims data shows Mark provided 1,243 services to 969 patients.
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
Areas of Expertise
Common questions
What is Dr. Janzen's specialty?
Dr. Janzen is a vascular surgeon in Riverside, CA. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “VASCULAR SURGERY”.
NPI registry
Where can I find Dr. Janzen?
Dr. Janzen is listed at 10800 MAGNOLIA AVENUE, KAISER PERMANENTE RIVERSIDE MEDICAL CENTER, Riverside, CA 92505. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Dr. Janzen?
The number on file is (440) 781-0931. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. Janzen?
Dr. Janzen's National Provider Identifier is 1932329265. 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
What is Dr. Janzen's medical education?
Dr. Janzen attended Other, graduating in 2001. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Janzen have?
Dr. Janzen has 25 years experience. Calculated from a graduation year of 2001, reported in the CMS National Downloadable File.
CMS public data
What is Dr. Janzen known for?
According to Medicare billing data, Dr. Janzen performs procedures including balloon dilation of artery of leg, initial vessel, insertion of needle and/or tube into hemodialysis circuit and balloon dilation of dialysis segment with review by radiologist and insertion of stent and blood clot protection device in neck artery with review by radiologist; reads or performs imaging such as ultrasonic guidance for blood vessel access and review by radiologist of arm or leg artery image; provides treatments such as use of a drug to induce depression of consciousness by physician performing a procedure , initial 15 minutes, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Janzen's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Janzen. If this is you, claiming it is free.
Guide.md
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (440) 781-0931
- Email not available
Practice Locations
10800 MAGNOLIA AVENUE, KAISER PERMANENTE RIVERSIDE MEDICAL CENTER
Riverside, CA 92505
Procedures Most Often Billed to Medicare
1,243 services · 969 patients · 21 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Balloon dilation of artery of leg, initial vessel | Procedure | 37228 |
29 |
| Insertion of needle and/or tube into hemodialysis circuit and balloon dilation of dialysis segment with review by radiologist | Procedure | 36902 |
28 |
| Insertion of stent and blood clot protection device in neck artery with review by radiologist | Procedure | 37215 |
25 |
| Relocation of arm vein with connection to arm artery for hemodialysis | Procedure | 36821 |
21 |
| Revision of hemodialysis graft | Procedure | 36832 |
14 |
| Insertion of stent in arteries of leg | Procedure | 37226 |
13 |
| Removal of blood clot and portion of chest, neck, or brain artery | Procedure | 35301 |
13 |
| Insertion of abdominal cavity tube using an endoscope | Procedure | 49324 |
11 |
| Insertion of stent in groin artery, initial vessel | Procedure | 37221 |
11 |
| Ultrasonic guidance for blood vessel access | Imaging | 76937 |
85 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
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Claim this profileRelated providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
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.
Other vascular surgeons in Riverside 8
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
More connections — 16 related providers in 2 groups
Class of 2001 at Other 8
Providers who graduated from the same medical school in the same year.
Also performs Balloon dilation of artery of leg, initial vessel 8
Providers in CA who bill this service to Medicare most often.
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.