Doctor profile · Federal record
Dr. Mathias Masem, M.D.
Orthopaedic Hand Surgery Physician (CMS: Orthopedic Surgery) · Orthopaedic Surgery Physician · Oakland, CA
- NPI 1508810938
- Accepts Medicare
- MIPS 79.2 / 100 · 2023
- 51 yrs in practice
- Male
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
80 Grand Ave, Suite 600
Oakland, CA 946123744
(510) 763-0884
fax (510) 763-1574
Credentials & registration
- NPI registered
- May 2006 — 20 yrs on file
- Profile last updated
- December 18, 2014
- Year of graduation
- 1975 — 51 yrs since
- Specialty taxonomy
- 207XS0106X — NUCC code
- State license (1)
- California #G34134
- Medicaid
- CA #00G341340
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1508810938. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
1,209
Distinct HCPCS
10
Medicare allowed
$99,589
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
J3301 |
Injection, triamcinolone acetonide, not otherwise specified, 10 mg | 364 | 44 | $1 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 266 | 146 | $141 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 129 | 84 | $106 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 90 | 90 | $185 | |
20604 |
Aspiration and/or injection of fluid from small joint using ultrasound guidance | 88 | 61 | $100 | |
J0702 |
Injection, betamethasone acetate 3 mg and betamethasone sodium phosphate 3 mg | 87 | 38 | $7 | |
73130 |
X-ray of hand, minimum of 3 views | 61 | 39 | $49 | |
73110 |
X-ray of wrist, minimum of 3 views | 33 | 26 | $54 | |
73140 |
X-ray of finger, minimum of 2 views | 28 | 22 | $51 | |
20611 |
Aspiration and/or injection of fluid large joint using ultrasound guidance | 17 | 13 | $126 |
In context: peer comparison
Among 2 peers in Oakland Orthopaedic Hand Surgery Physician, average services per provider: 91. This provider delivers 13× the peer median.Open Payments
Industry payments received
All-time total
$553
Transactions
6
Manufacturers
5
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Axogen | 2 | $289.55 | |
| Skeletal Dynamics INC | 1 | $151.48 | |
| Acumed LLC | 1 | $70.88 | |
| Electronic Waveform Lab, INC. | 1 | $21.33 | |
| Endo USA, INC. | 1 | $20.12 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
163
Patients
65
Total drug cost
$887
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Meloxicam | Generic | 163 | 65 | $887 |
Hospital affiliations
Frequently asked questions
What is Dr. Mathias Masem's medical specialty?
Dr. Mathias Masem practices Orthopaedic Hand Surgery Physician in Oakland, CA.
Where does Dr. Mathias Masem practice?
Dr. Mathias Masem practices at 80 Grand Ave, Oakland, CA 946123744. Office phone: 5107630884.
What is Dr. Mathias Masem's NPI?
Dr. Mathias Masem's National Provider Identifier (NPI) is 1508810938, issued by NPPES.
Does Dr. Mathias Masem accept Medicare assignment?
Yes. Dr. Mathias Masem accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Mathias Masem commonly perform?
Top Medicare-reported procedures in 2023: Injection, triamcinolone acetonide, not otherwise specified, 10 mg (HCPCS J3301); Established patient office or other outpatient visit (HCPCS 99214); Established patient office or other outpatient visit (HCPCS 99213). Source: CMS Medicare Physician & Other Practitioners file.