Physician Profile
Unclaimed ProfileAbout MERZA
Hussein Merza, MD practices medical oncology in Corona, CA. Hussein is also listed as specializing in hematology and hematology & oncology. Medicare claims data shows Hussein provided 122 services to 83 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
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (951) 371-2411
- Email not available
Practice Locations
260 E ONTARIO AVE STE 101
Corona, CA 92879
Procedures Most Often Billed to Medicare
122 services · 83 patients · 3 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
74 |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | Office visit | 99233 |
31 |
| Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | Office visit | 99223 |
17 |
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.
Related specialists at this location 2
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 — 16 related providers in 2 groups
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2007 at Other 8
Providers who graduated from the same medical school in the same year.
Common questions
What does Dr. Merza specialize in?
Dr. Merza is a medical oncology in Corona, CA. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “MEDICAL ONCOLOGY”.
NPI registry
Where is Dr. Merza located?
Dr. Merza is listed at 260 E ONTARIO AVE STE 101, Corona, CA 92879. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Merza's phone number?
The number on file is (951) 371-2411. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. Merza?
Dr. Merza's National Provider Identifier is 1235409673. 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 Dr. Merza go to medical school?
Dr. Merza attended Other, graduating in 2007. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Merza have?
Dr. Merza has 19 years experience. Calculated from a graduation year of 2007, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Merza do most often?
According to Medicare billing data, Dr. Merza 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
Is Dr. Merza's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Merza. 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.