Doctor profile · Federal record
Dr. Catherine Matthys, M.D.
Internal Medicine Physician (CMS: Internal Medicine) · Student in an Organized Health Care Education/Training Program · Mission Hills, CA
- NPI 1104244656
- Accepts Medicare
- 12 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
11333 Sepulveda Blvd
Mission Hills, CA 913451116
(818) 365-9531 - Mailing address
-
Po Box 9602
Mission Hills, CA 913469602
Credentials & registration
- NPI registered
- April 2014 — 12 yrs on file
- Profile last updated
- September 6, 2017
- Year of graduation
- 2014 — 12 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- California #A139337
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1104244656. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
954
Distinct HCPCS
5
Medicare allowed
$111,887
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 330 | 117 | $81 | |
99233 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 258 | 101 | $122 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 147 | 146 | $177 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 128 | 128 | $132 | |
99239 |
Hospital discharge day management, more than 30 minutes | 91 | 89 | $118 |
In context: peer comparison
Among 32 peers in this city , average services per provider: 108. This provider delivers 8.8× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
39
Patients
13
Total drug cost
$2,662
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Amoxicillin-Clavulanate Potass (Amoxicillin/Potassium Clav) | Brand | 14 | 13 | $83 |
| Ampicillin-Sulbactam (Ampicillin Sod/Sulbactam Sod) | Brand | 14 | 0 | $2,544 |
| Prednisone | Generic | 11 | 0 | $35 |
Frequently asked questions
What is Dr. Catherine Matthys's medical specialty?
Dr. Catherine Matthys practices Internal Medicine Physician in Mission Hills, CA.
Where does Dr. Catherine Matthys practice?
Dr. Catherine Matthys practices at 11333 Sepulveda Blvd, Mission Hills, CA 913451116. Office phone: 8183659531.
What is Dr. Catherine Matthys's NPI?
Dr. Catherine Matthys's National Provider Identifier (NPI) is 1104244656, issued by NPPES.
Does Dr. Catherine Matthys accept Medicare assignment?
Yes. Dr. Catherine Matthys accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Catherine Matthys commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232); Subsequent hospital care with moderate levelof medical decision making (HCPCS 99233); Initial hospital care with moderate level of medical decision making (HCPCS 99223). Source: CMS Medicare Physician & Other Practitioners file.