Ilian Orlando Marquez, M.D.
Nephrology Physician · Pasadena, CA
Ilian Orlando Marquez, M.D. is a nephrology physician with a practice address in Pasadena, California, and NPI 1710019906, issued on Mar 12, 2007. Check the license (California A80500, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Ilian Orlando Marquez
- Credential
- M.D.
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- A80500 CA
Self-reported in NPPES; status is on the state search - Practice location
- 301 S Fair Oaks Ave Ste 405, Pasadena, CA 91105
- Phone
- (626) 794-7075
- Enumerated
- Mar 12, 2007
- Record last updated
- Mar 6, 2026
- Fax
- (626) 404-7545
- Medicaid ID
- 00A805000 CA
- Medicare enrollment
- Enrolled (PECOS I20070724000564); accepts Medicare assignment
- Medical or professional school
- University Of Texas Medical School At San Antonio, 2001
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 1,468 in California → Look up another NPI →
Also registered at 301 S Fair Oaks Ave Ste 405
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Justin Chen, MDNephrology Physician1447526066
- Dolores Figueroa, M.D.Internal Medicine Physician1033287701
- Jennifer Kahau-Segovia, FNPNurse Practitioner1629608906
- Nalini Mattai, MDGeneral Practice Physician1982803052
- Elana Sheldon, MDInternal Medicine Physician1790708915
- Ashok Sunder Raj, M.D.Nephrology Physician1093744070
Verify Ilian Orlando Marquez in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A80500Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
28% more Medicare Part D claims than the average nephrology physician in 2024
1,881 Medicare Part D claims for 265 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. Brand-name drugs were 21% of claims.
Most prescribed
- Furosemide190 claims
- Amlodipine Besylate142 claims
- Sevelamer Carbonate104 claims
- Losartan Potassium76 claims
- Carvedilol73 claims
- Prednisone73 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The MIPS final score for 2023 (Medicare payment program): 34.9 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $603.20
19 payments; by number, the most common kind was food and beverage; the largest payer was Aurinia Pharma U.S., Inc. The 8,230 providers of this specialty with any payment received $3,091.37 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Arroyo Nephrology AssociatesPasadena, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ilian Orlando Marquez among 1,468 nephrology physician records in California
Ilian Orlando Marquez, M.D. is one of 1,468 nephrology physician records with a practice address in California. 88% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 52% of them.
- NPI issued2007 · 52% of these records are older, 35% newer
- In a Medicare fileYes · 88% of these records are
- In the CMS Doctors and Clinicians fileYes · 77% of these records are
- Graduated2001 · median 2001 among the 1,128 with a school on file
- Record last updated2026 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RN0300X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nephrology Physician providers in California
There are 1,468 nephrology physician records in California.
All 1,468 in California → Every provider in Pasadena → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Syeda Ali, MDPasadena, CA 911051528051984
- Allen ChaoPasadena, CA 911051952765034
- Justin Chen, MDPasadena, CA 911051447526066
- Muhammad Iqbal, M.D.Pasadena, CA 911051578515896
- Matthew Kim, DOPasadena, CA 911051700319837
- Michael Linsey, M.D.Pasadena, CA 911051841215217
- Ann Moore, MDPasadena, CA 911051750506630
- Ashok Sunder Raj, M.D.Pasadena, CA 911051093744070
Common questions
What is Ilian Orlando Marquez, M.D.'s NPI number?
Ilian Orlando Marquez, M.D.'s National Provider Identifier (NPI) is 1710019906, issued on Mar 12, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Ilian Orlando Marquez, M.D. located?
The NPPES record lists a practice address at 301 S Fair Oaks Ave Ste 405, Pasadena, CA, 91105. Phone: (626) 794-7075. Providers update this record themselves, so call before visiting.
How can I verify Ilian Orlando Marquez, M.D.'s license?
NPPES lists California license number A80500, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Ilian Orlando Marquez, M.D. prescribe under Medicare Part D?
In 2024, Ilian Orlando Marquez, M.D. had 1,881 Medicare Part D claims for 265 beneficiaries; the average among nephrology physician prescribers was 1,465. Part D covers Medicare prescriptions only.
What is Ilian Orlando Marquez, M.D.'s MIPS final score?
The 2023 MIPS final score is 34.9 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.