Physician Profile
Mathias A. Masem, M.D.
Unclaimed ProfileAbout Dr. Masem
Based in Oakland, CA, Mathias A. Masem, M.D. is listed in the NPI registry under orthopaedic hand surgery. Mathias graduated from University of Minnesota Medical School in 1975. Mathias is also listed as specializing in orthopaedic surgery. According to Medicare claims data, Mathias cared for 529 Medicare patients across 1,048 services. The services billed most often include injection, triamcinolone acetonide, not otherwise specified, 10 mg, established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more, and injection, betamethasone acetate 3 mg and betamethasone sodium phosphate 3 mg.
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
Source: NPPES NPI Registry
Contact Information
- (510) 763-0884
- Email not available
Practice Locations
80 GRAND AVE SUITE 600
Oakland, CA 94612
Conditions Commonly Evaluated or Treated
Within Hand Surgery 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
Arthritis & Joints
- Bone Spur on Finger
- Hand and Wrist Arthritis
- Hand Arthritis
- Kienbock's Disease
- Stiff Fingers
- Wrist sprain
Circulation
- Cold Sensitive Fingers and Toes
Congenital
- Extra or Webbed Fingers
Fractures & Injuries
- Black Toenail
- Boxer's Fracture
- Broken Scaphoid Bone
- Dislocated Finger
- Hand and finger fractures
- Jammed Finger
- Severed Finger
- Torn Thumb Ligament
- Wrist Cartilage Tear
- Wrist fracture
Infections
- Infected Finger
Injuries
- Boxer's Knuckle
- Crushed Hand Injury
- Foreign Object in Hand
- Hand Compartment Syndrome
- Jersey Finger
- Sprained Finger
Lumps & Bumps
- Bone Tumor in Hand
- Finger Cyst
Lumps & Masses
- Ganglion Cyst In Hand Or Wrist
- Hand Lump
Nails
- Nail Bed Injury
Nerves
- Carpal tunnel
- Cubital tunnel syndrome
- Cut Nerve in Hand
- Hand Neuroma
- Hand Numbness and Tingling
- Hand Weakness
- Pinched Nerve in Wrist
- Wrist Drop
Tendons
- De Quervain tenosynovitis
- Dupuytren's contracture
- Golfer's elbow
- Intersection Syndrome
- Mallet Finger
- Swan Neck Deformity
- Tennis elbow
- Torn Hand Tendon
- Trigger finger
Procedures & services
Bone surgery
- Ulnar Shortening Surgery
Cyst & Lump Removal
- Ganglion Cyst Removal
- Removal of a soft-tissue mass
Fracture Repair
- Boxer's Fracture Fixation
- Broken Finger Surgery
- Scaphoid Fracture Surgery
- Wrist fracture fixation
Injections
- Cortisone Shot for Finger
- Cortisone Shot for Wrist
- Xiaflex Injection for Dupuytren's
Injections & Therapy
- Custom Hand Splinting
- Hand therapy
- Mallet Finger Splinting
- PRP Shot for Wrist or Elbow
- Tendon Sheath Injection
Joint surgery
- Finger Bone Spur Removal
- Thumb Base Joint Replacement
Joint Surgery
- Finger Joint Fusion
- Finger Joint Replacement
- Thumb Arthritis Surgery
- Thumb Ligament Repair
- Wrist Arthroscopy
- Wrist Cartilage Repair
- Wrist Fusion
Minor procedures
- Finger Dislocation Reset
- Foreign Object Removal from Hand
Nail procedures
- Blood Under Toenail Drainage
- Nail Bed Repair
Nerve Surgery
- Carpal tunnel surgery
- Cubital tunnel decompression
- Nerve Repair Surgery
Nerve surgery
- Hand Neuroma Surgery
- Minimally Invasive Carpal Tunnel Release
Pain management
- Wrist Denervation Surgery
Tendon Surgery
- Dupuytren contracture surgery
- Tendon Repair Surgery
- Tendon Transfer Surgery
- Tennis Elbow Surgery
- Thumb Tendon Release
- Trigger finger release
Tendon surgery
- Jersey Finger Repair
- Tendon Scar Tissue Release
Trauma & Reconstruction
- Drainage of Finger Infection
- Extra Finger Removal
- Fingertip Reconstruction
- Severed Finger Reattachment
- Webbed Finger Separation
Wound repair
- Skin Graft for Hand Wound
Procedures Most Often Billed to Medicare
1,048 services · 529 patients · 12 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Aspiration and/or injection of fluid from small joint using ultrasound guidance | Procedure | 20604 |
59 |
| Aspiration and/or injection of fluid from medium joint using ultrasound guidance | Procedure | 20606 |
20 |
| Release of wrist ligament using an endoscope | Procedure | 29848 |
16 |
| Aspiration and/or injection of fluid from medium joint | Procedure | 20605 |
15 |
| X-ray of hand, minimum of 3 views | Imaging | 73130 |
49 |
| X-ray of wrist, minimum of 3 views | Imaging | 73110 |
48 |
| X-ray of finger, minimum of 2 views | Imaging | 73140 |
17 |
| Injection, triamcinolone acetonide, not otherwise specified, 10 mg | Drug given | J3301 |
296 |
| Injection, betamethasone acetate 3 mg and betamethasone sodium phosphate 3 mg | Drug given | J0702 |
109 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
251 |
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.
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 orthopaedic hand surgeons in Oakland 7
Same specialty, same city.
Trained at University of Minnesota Medical School 8
Other providers in the same specialty who trained at the same institution.
More connections — 16 related providers in 2 groups
Class of 1975 at University of Minnesota Medical School 8
Providers who graduated from the same medical school in the same year.
Also performs Aspiration and/or injection of fluid from small joint using ultrasound guidance 8
Providers in CA who bill this service to Medicare most often.
Common questions
What does Mathias A. Masem specialize in?
Mathias A. Masem is an orthopaedic hand surgeon in Oakland, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Orthopaedic Hand Surgery”.
NPI registry
Where is Mathias A. Masem located?
Mathias A. Masem is listed at 80 Grand Ave Suite 600, Oakland, CA 94612. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Mathias A. Masem's phone number?
The number on file is (510) 763-0884. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Mathias A. Masem's NPI number?
Mathias A. Masem's National Provider Identifier is 1508810938. 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 Mathias A. Masem train?
Mathias A. Masem attended University of Minnesota Medical School, graduating in 1975. This comes from the CMS National Downloadable File.
CMS public data
How long has Mathias A. Masem been practicing?
Mathias A. Masem has 51 years experience. Calculated from a graduation year of 1975, reported in the CMS National Downloadable File.
CMS public data
What does Mathias A. Masem do most often?
According to Medicare billing data, Mathias A. Masem performs procedures including aspiration and/or injection of fluid from small joint using ultrasound guidance, aspiration and/or injection of fluid from medium joint using ultrasound guidance and release of wrist ligament using an endoscope; reads or performs imaging such as x-ray of hand, minimum of 3 views and x-ray of wrist, minimum of 3 views, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Mathias A. Masem confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Mathias A. Masem. 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.