Physician Profile
Unclaimed ProfileAbout Dr. Matthys
Catherine M. Matthys, M.D. is a healthcare provider in Mission Hills, CA specializing in internal medicine. Catherine is also listed as specializing in student in an organized health care education program. According to Medicare claims data, Catherine cared for 431 Medicare patients across 653 services.
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
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (818) 365-9531
- Email not available
Practice Locations
11333 SEPULVEDA BLVD
Mission Hills, CA 91345
Conditions Commonly Evaluated or Treated
Within Internal Medicine generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Cardiometabolic
- High blood pressure (hypertension)
- High cholesterol and lipid disorders
- Metabolic syndrome
- Overweight and obesity
- Peripheral artery disease
- Prediabetes
- Stable coronary artery disease
- Type 2 diabetes
Digestive and liver
- Acid reflux (GERD)
- Alcohol-associated liver disease
- Constipation
- Diverticulosis and uncomplicated diverticulitis
- Fatty liver disease
- Irritable bowel syndrome
- Peptic ulcer disease
Endocrine, blood, and bone
- Anemia of chronic disease
- Gout
- Iron-deficiency anemia
- Osteoporosis
- Overactive thyroid (hyperthyroidism)
- Underactive thyroid (hypothyroidism)
- Vitamin B12 deficiency
- Vitamin D deficiency
Infectious disease
Kidney and urinary
- Acute kidney injury
- Chronic kidney disease
- Enlarged prostate (BPH)
- Overactive bladder
- Urinary tract infection
Respiratory
- Acute bronchitis
- Asthma
- Chronic obstructive pulmonary disease
- Community-acquired pneumonia
- Obstructive sleep apnea
Cardiac and vascular
- Atrial fibrillation
- Blood clots (DVT and pulmonary embolism)
- Chronic venous insufficiency
- Heart failure
- Stable angina
Neurologic and behavioral
Rheumatologic and pain
Procedures & services
Preventive and evaluation
- Annual physical and preventive visit
- Chronic disease management
- Medicare annual wellness visit
- Medication review and management
- Post-hospital transitional care
- Preoperative medical clearance
Screening and diagnostic testing
- Ambulatory blood-pressure monitoring
- Blood pressure screening
- Cancer screening and prevention planning
- Cholesterol screening
- Depression screening
- Diabetes and prediabetes screening
- Electrocardiogram
- Spirometry
Office procedures
Procedures Most Often Billed to Medicare
653 services · 431 patients · 5 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | Office visit | 99232 |
237 |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | Office visit | 99233 |
138 |
| Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | Office visit | 99223 |
122 |
| Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | Office visit | 99222 |
98 |
| Hospital discharge day management, more than 30 minutes | Office visit | 99239 |
58 |
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 internal medicines at this location 8
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 6
Clinically related specialties at the same address — the people this provider most likely works alongside.
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 — 22 related providers in 3 groups
Other internal medicines in Mission Hills 6
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2014 at Other 8
Providers who graduated from the same medical school in the same year.
Common questions
What is Dr. Matthys's specialty?
Dr. Matthys is an internal medicine in Mission Hills, CA. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “INTERNAL MEDICINE”.
NPI registry
Where can I find Dr. Matthys?
Dr. Matthys is listed at 11333 SEPULVEDA BLVD, Mission Hills, CA 91345. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Dr. Matthys?
The number on file is (818) 365-9531. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Matthys's NPI number?
Dr. Matthys's National Provider Identifier is 1104244656. 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. Matthys's medical education?
Dr. Matthys attended Other, graduating in 2014. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Matthys been practicing?
Dr. Matthys has 12 years experience. Calculated from a graduation year of 2014, reported in the CMS National Downloadable File.
CMS public data
What is Dr. Matthys known for?
According to Medicare billing data, Dr. Matthys 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
Has Dr. Matthys confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Matthys. If this is you, claiming it is free.
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Claim this profileProvider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.