Kidney Failure, ChronicRenal Insufficiency, ChronicDaprodustatDarbepoetin alfaIron therapy
Dr. Riad Y. Darwish, MD
NPI1366459208
- Medicare services, 2024
- 201
- Medicare patients, 2024
- 70
- Part D claims, 2024
- 720
- Clinical trials
- 3
- Industry payments
- $1,021
- Practice address
- 12462 Putnam St, Whittier, CA 90602
- Practice phone
- Call (562) 698-8141
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Whittier Internal Medicine and Nephrology Medical Group Inc
Whittier, California
Find Dr. Darwish's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Riad Y. Darwish is a nephrologist in Whittier, California
Dr. Darwish practices at Whittier Internal Medicine and Nephrology Medical Group Inc in Whittier, California.
Dr. Darwish's NPI, 1366459208, was assigned on August 2, 2006. Dr. Darwish graduated from University of Baghdad College of Medicine in 1972. Dr. Darwish holds California license A36607.
NPI and contact details
- NPI
- 1366459208NPI Registry (opens in a new tab)
- NPI enumeration date
- August 2, 2006
- NPI status
- Active
- Practice phone
- (562) 698-8141
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 80
- Medical school graduation
- 1972
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Riad Y. Darwish practices at Whittier Internal Medicine and Nephrology Medical Group Inc in Whittier, California
Dr. Darwish's primary practice is Whittier Internal Medicine and Nephrology Medical Group Inc, at 12462 Putnam St, Whittier, CA 90602 in Los Angeles County. The practice phone is (562) 698-8141.
- Whittier Internal Medicine and Nephrology Medical Group Inc12462 Putnam St, Whittier, CA 90602 · Los Angeles CountyPhone(562) 698-8141
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Riad Y. Darwish is affiliated with 2 sites of care and 1 medical group
Dr. Darwish's primary practice is Whittier Internal Medicine and Nephrology Medical Group Inc in Whittier, California. The medical group on file is Whittier Internal Medicine & Nephrology Medical Group. Dmand AI also links Dr. Darwish to 1 more group practice or clinic, named with a free account.
Whittier Internal Medicine and Nephrology Medical Group IncPrimary
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Riad Y. Darwish's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Darwish practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Whittier Internal Medicine and Nephrology Medical Group Inc | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Riad Y. Darwish is one of 1,401 nephrologists in California
Nephrology is Dr. Darwish's primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dr. Darwish is board certified in internal medicine by the American Board of Internal Medicine. Dmand AI has Dr. Darwish's licenses on file in 4 states: California, New York, Maryland and Ohio.
Specialties and state licenses
- Nephrology, CaliforniaPrimary
- New York license
- Maryland license
- Ohio license
Clinical focus
Dmand AI lists acute kidney failure, chronic anemia and chronic kidney disease among the conditions Dr. Darwish treats.
Nephrologists near Dr. Darwish
Counts of nephrologists with a Dmand AI profile, by place and practice. Each opens the list.
1,401nephrologists in California
3nephrologists in Whittier
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Riad Y. Darwish billed Medicare for 201 services in 2024
CMS data shows 201 Medicare services from Dr. Darwish across 2 procedure codes in 2024, all of them office visits, for 70 Medicare patients. Medicare paid $12,682 for them. Every service was in an office.
Medicare services, 2024201
Medicare patients70
Paid by Medicare$12,682
Procedure codes2
Dr. Darwish's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1912024: 2015%
Dr. Darwish compared with the California median for nephrologists, 2024
- Dr. Darwish
- California median
- Medicare services
- 201vs 1,08481% below
- Medicare patients
- 70vs 30777% below
- Part D claims
- 524vs 95545% below
Medians across 1,355 nephrologists in California with Dmand AI profiles that report each measure.
Dr. Darwish's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Darwish?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Darwish and other nephrologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Riad Y. Darwish treated 70 Medicare patients in 2024, average age 79
CMS counts 70 Medicare patients who saw Dr. Darwish in 2024. The largest group is 75 to 84, with 31 patients. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 1.93, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Darwish's median patient age at 75, with 53% women.
Medicare patients, 202470
Average age79
Average risk score1.93
Dr. Darwish's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Darwish's Medicare patients by sex, 2024
- Women3956%
- Men3144%
Chronic conditions among Dr. Darwish's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Chronic kidney disease64%
- Diabetes60%
- Arthritis54%
- Ischemic heart disease39%
- Heart failure33%
- Atrial fibrillation23%
Share of Medicare patients with each condition. A patient can have several.
Dr. Darwish's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 75
Patient panel by sex, all payers
- Women53%
- Men47%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Riad Y. Darwish wrote 720 Medicare Part D claims in 2024
In 2024, Dr. Darwish wrote 720 Medicare Part D claims for 88 patients. 88% of them were for generic drugs. CMS names the drug for 524 of them, across 20 drugs with 11 or more claims each, at $32,633 in total drug cost. In 2023, CMS named 531 claims across 18 drugs.
Part D claims, 2024720
Drugs named by CMS20
Total drug cost$32,633
Part D patients88
Dr. Darwish's Part D claims by kind of drug, 2024
- Generic632 claims88%
- Brand-name and other88 claims12%
Dr. Darwish's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Darwish's Part D claims, 2024
- Antibiotics3%23 of 720 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 5312024: 5241%
Drugs named by CMS: 20 in 2024, 18 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
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Dr. Riad Y. Darwish has worked on 3 clinical trials
Dmand AI links Dr. Darwish to 3 clinical trials, 2 of them phase 3 studies. Conditions studied include Renal Insufficiency, Chronic, Anemia, Iron-Deficiency and Kidney Failure, Chronic. GlaxoSmithKline sponsors the most, 2. Open Payments lists research payments to Dr. Darwish that name 1 trial.
Conditions in Dr. Darwish's trials
- Renal Insufficiency, Chronic
- Anemia, Iron-Deficiency
- Kidney Failure, Chronic
- Anemia, Hypochromic
- Renal Insufficiency
Investigators on the most trials with Dr. Darwish
- Nausheen B. Ali, MD2 shared trials
- Joel Justin Baranski, MD2 shared trials
- Harjeet S. Brar, MD2 shared trials
Recent clinical trials with Dr. Darwish
Renal Insufficiency, ChronicRenal InsufficiencyDaprodustatDarbepoetin alfaIron Therapy
$4,130 in research paymentsAnemia, Iron-DeficiencyAnemia, HypochromicFerumoxytolIron Sucrose
Sources: Open Payments (CMS), 2025 data, released July 7, 2026; ClinicalTrials.gov (National Library of Medicine); and Dmand AI Research Linkage
Dr. Riad Y. Darwish received $1,021 in industry payments from 2016 to 2025
CMS Open Payments shows 21 general payments to Dr. Darwish from 8 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Otsuka America Pharmaceutical, Inc. paid the most, $265. It also lists 2 research payments totaling $17,368 in 2016, naming 1 clinical trial.
General payments to Dr. Darwish by program year, 2016 to 2025
Companies that paid Dr. Darwish the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Riad Y. Darwish graduated from University of Baghdad College of Medicine
Dr. Darwish graduated from University of Baghdad College of Medicine in 1972.
- Medical school
- Board certified in internal medicine
- Board certified in nephrology
Source: Dmand AI Professional Profile Data
Dr. Riad Y. Darwish accepts plans from 16 insurance carriers
Dr. Darwish is in network with 16 carriers, including Elevance, Blue Cross Blue Shield of Michigan and United Healthcare. HMO plans come from the most carriers, 9. Check the plan with the practice before a visit.
- Elevance
- Blue Cross Blue Shield of Michigan
- United Healthcare
- HCSC
- Aetna
- Blue Cross Blue Shield of Massachusetts
- LA Care
- Molina
- +8 more carriersWith a free account
Plan types Dr. Darwish accepts, by number of carriers
- HMO9
- Medicare8
- PPO8
- POS4
- EPO3
- Medicaid1
Source: Dmand AI Insurance Network Data
Sources for Dr. Riad Y. Darwish's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| Clinical trials and co-investigators | ClinicalTrials.gov (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Riad Y. Darwish
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Riad Y. Darwish's NPI number?
Dr. Riad Y. Darwish's NPI number is 1366459208. It was assigned on August 2, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Riad Y. Darwish?
Dr. Riad Y. Darwish is a nephrologist in Whittier, California. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).
Where does Dr. Riad Y. Darwish practice?
Dr. Darwish practices at 12462 Putnam St, Whittier, CA 90602. Dr. Darwish's primary practice is Whittier Internal Medicine and Nephrology Medical Group Inc in Whittier, California. Dmand AI also links Dr. Darwish to 1 group practice or clinic.
What is Dr. Riad Y. Darwish's office phone number?
The practice phone on file for Dr. Darwish is (562) 698-8141.
What is Dr. Riad Y. Darwish's medical license number?
Dr. Darwish holds California license A36607, one of the licenses on file in 4 states.
Which states has Dr. Riad Y. Darwish been licensed in?
Dmand AI has state licenses on file for Dr. Darwish in California (1981 to 2026), New York (since 1980), Maryland (1979 to 2004) and Ohio (1981 to 1982).
What medical group is Dr. Riad Y. Darwish part of?
Dr. Darwish is linked to Whittier Internal Medicine & Nephrology Medical Group.
Does Dr. Riad Y. Darwish accept Medicare?
Yes. CMS data shows Dr. Darwish billed Medicare for 201 services in 2024.
How many Medicare patients does Dr. Riad Y. Darwish see?
CMS counts 70 Medicare patients who saw Dr. Darwish in 2024, with an average age of 79.
Is Dr. Riad Y. Darwish board certified?
Yes. Dr. Darwish is board certified in internal medicine by the American Board of Internal Medicine.
Show 7 more questionsShow fewer questions
What services does Dr. Riad Y. Darwish bill to Medicare?
In 2024, Dr. Darwish's most billed Medicare services were office visit, established patient (99214) and office visit, established patient (99213).
Where did Dr. Riad Y. Darwish go to medical school?
Dr. Darwish graduated from University of Baghdad College of Medicine in 1972.
What drugs does Dr. Riad Y. Darwish prescribe most?
In 2024 Medicare Part D data, Dr. Darwish's most prescribed drugs by claims were Atorvastatin Calcium, Labetalol HCl and Amlodipine Besylate.
Has Dr. Riad Y. Darwish received payments from drug or device companies?
CMS Open Payments shows $1,021 in general payments to Dr. Darwish from 8 companies from 2016 to 2025. The largest total came from Otsuka America Pharmaceutical, Inc.
How long has Dr. Riad Y. Darwish been practicing?
Dr. Darwish graduated from medical school in 1972, 54 years ago.
Does Dr. Riad Y. Darwish do research?
Dr. Darwish has worked on 3 clinical trials.
What insurance does Dr. Riad Y. Darwish accept?
Dr. Darwish is in network with 16 carriers, including Elevance, Blue Cross Blue Shield of Michigan and United Healthcare. HMO plans come from the most carriers, 9. Check the plan with the practice before a visit.
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