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Edit this profileAt a glance
- 301 S Fair Oaks Ave Ste 405, Pasadena, CA 91105
About Dr. Marquez
Ilian O. Marquez, M.D. is a healthcare provider in Pasadena, CA specializing in nephrology. Ilian trained at University of Texas Medical School at San Antonio, graduating in 2001. According to Medicare claims data, Ilian cared for 524 Medicare patients across 1,387 services. The services billed most often include subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes, dialysis services, 4 or more physician visits per month (20 years or older), and established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more. This provider record is associated with NPI 1710019906.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (626) 794-7075
- Email not available
Practice Locations
301 S FAIR OAKS AVE STE 405
Pasadena, CA 91105
Conditions Commonly Evaluated or Treated
Within Nephrology 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
Most searched conditions
Acid-base disorders
Anatomical conditions
Autoimmune conditions
Blood disorders
Blood pressure
Cysts and growths
Diabetes complications
Dialysis complications
Electrolyte disorders
Fluid retention
Genetic disorders
Hormone disorders
Infections
Inflammatory conditions
Kidney damage
Kidney failure
Kidney filter diseases
Lab abnormalities
Metabolic disorders
Multi-organ conditions
Structural kidney issues
Symptoms
Urine abnormalities
Urine symptoms
Vascular conditions
Vascular kidney issues
Procedures & services
Medical diet therapy
Most searched procedures
Consultations
Diagnostic tests
Diagnostics
Dialysis
Dialysis access
- Dialysis Access Physical Exam
- Dialysis Catheter Removal
- Dialysis Fistula Repair
- Temporary Dialysis Line Placement
Diet and nutrition
Imaging
Infusions
Interventional procedures
Lab tests
- 24-hour urine test
- Comprehensive Metabolic Panel
- Kidney Function Blood Test
- Parathyroid hormone monitoring
- Urine protein check
- Urine sediment test
Medication management
- Active Vitamin D Therapy
- Resistant Blood Pressure Medication Adjustment
- Steroid Therapy For Kidney Inflammation
Medication therapy
- Acid reducer treatment for kidneys
- Phosphate binder therapy
- Potassium lowering treatment
- Red blood cell booster injections
- Water pill adjustment
Patient education
Prevention
Procedures
Specialized therapies
Supportive care
Surgical procedures
Transplant care
Vascular access
Procedures Most Often Billed to Medicare
1,387 services · 524 patients · 10 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Dialysis services, 4 or more physician visits per month (20 years or older) | Treatment | 90960 |
208 | More often than most peers in Nephrology |
| Dialysis services, 2-3 physician visits per month (20 years or older) | Treatment | 90961 |
77 | More often than most peers in Nephrology |
| Dialysis services, 1 physician visit per month (20 years or older) | Treatment | 90962 |
38 | As often as other peers in Nephrology |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | Office visit | 99232 |
679 | More often than most peers in Nephrology |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
204 | More often than most peers in Nephrology |
| Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | Office visit | 99222 |
68 | More often than most peers in Nephrology |
| Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | Office visit | 99223 |
56 | As often as other peers in Nephrology |
| New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more | Office visit | 99204 |
25 | As often as other peers in Nephrology |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | Office visit | 99233 |
21 | Less often than most peers in Nephrology |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
11 | Less often than most peers in Nephrology |
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 kidney specialists in Pasadena 8
Same specialty, same city.
Trained at University of Texas Medical School at San Antonio 8
Other providers in the same specialty who trained at the same institution.
More connections — 15 related providers in 2 groups
Class of 2001 at University of Texas Medical School at San Antonio 7
Providers who graduated from the same medical school in the same year.
Also performs Dialysis services, 4 or more physician visits per month (20 years or older) 8
Providers in CA who bill this service to Medicare most often.
Common questions
What does Ilian O. Marquez specialize in?
Ilian O. Marquez is a kidney specialist in Pasadena, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Nephrology”.
NPI registry
Where is Ilian O. Marquez located?
Ilian O. Marquez is listed at 301 S Fair Oaks Ave Ste 405, Pasadena, CA 91105. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Ilian O. Marquez's phone number?
The number on file is (626) 794-7075. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Ilian O. Marquez's NPI number?
Ilian O. Marquez's National Provider Identifier is 1710019906. 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 Ilian O. Marquez train?
Ilian O. Marquez attended University of Texas Medical School at San Antonio, graduating in 2001. This comes from the CMS National Downloadable File.
CMS public data
How long has Ilian O. Marquez been practicing?
Ilian O. Marquez has 25 years experience. Calculated from a graduation year of 2001, reported in the CMS National Downloadable File.
CMS public data
What does Ilian O. Marquez do most often?
According to Medicare billing data, Ilian O. Marquez provides treatments such as dialysis services, 4 or more physician visits per month and dialysis services, 2-3 physician visits per month, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Ilian O. Marquez confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Ilian O. Marquez. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.