Dr. Raffi B. Merjanian, MD
- Medicare services, 2024
- 16
- Medicare patients, 2024
- 29
- Part D claims, 2024
- 1,964
- Publications
- 1
- Hospital affiliations
- 1
- Practice address
- 950 S Eastern Ave, Los Angeles, CA 90022
- Practice phone
- Call (562) 862-0001
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Downey Landing Dialysis Center
Los Angeles, California
Find Dr. Merjanian'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. Raffi B. Merjanian is a nephrologist in Los Angeles, California
Dr. Merjanian practices at Downey Landing Dialysis Center in Los Angeles, California.
Dr. Merjanian's NPI, 1649347477, was assigned on November 29, 2006. Dr. Merjanian graduated from David Geffen School of Medicine at UCLA in 2000. Dr. Merjanian holds California license A77348.
- NPI
- 1649347477NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6002919743
- NPI enumeration date
- November 29, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (562) 862-0001
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 52
- Medical school graduation
- 2000
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Raffi B. Merjanian practices at Downey Landing Dialysis Center in Los Angeles, California
Dr. Merjanian's primary practice is Downey Landing Dialysis Center, at 950 S Eastern Ave, Los Angeles, CA 90022 in Los Angeles County. The practice phone is (562) 862-0001.
- Downey Landing Dialysis Center950 S Eastern Ave, Los Angeles, CA 90022 · Los Angeles CountyPhone(562) 862-0001
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Raffi B. Merjanian is affiliated with 5 sites of care and 1 medical group
Dr. Merjanian's primary practice is Downey Landing Dialysis Center in Los Angeles, California. Dr. Merjanian is also affiliated with Downey Medical Center. The medical group on file is Southern California Permanente Medical Group. Dmand AI also links Dr. Merjanian to 2 more dialysis centers and 1 group practice or clinic, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Raffi B. Merjanian's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Merjanian practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Downey Landing Dialysis Center | Available with a free account |
| +4 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Raffi B. Merjanian is one of 1,401 nephrologists in California
Nephrology is Dr. Merjanian's primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dr. Merjanian is board certified in nephrology by the American Board of Internal Medicine. Dr. Merjanian is licensed in California.
Specialties and state licenses
- Nephrology, CaliforniaPrimary
Nephrologists near Dr. Merjanian
Counts of nephrologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Raffi B. Merjanian billed Medicare for 16 services in 2024
CMS data shows 16 Medicare services from Dr. Merjanian across 1 procedure code in 2024, all of them office visits, for 29 Medicare patients. Medicare paid $1,258 for them. Every service was in an office.
Dr. Merjanian's Medicare services by type, 2018 to 2024
- 2018
- 2024
- Office and hospital visits
- 2018: 402024: 1660%
Dr. Merjanian compared with the California median for nephrologists, 2024
- Dr. Merjanian
- California median
- Medicare services
- 16vs 1,08499% below
- Medicare patients
- 29vs 30791% below
- Part D claims
- 1,807vs 95589% above
Medians across 1,355 nephrologists in California with Dmand AI profiles that report each measure.
Dr. Merjanian'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. Merjanian?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Merjanian and other nephrologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Raffi B. Merjanian treated 29 Medicare patients in 2024, average age 65
CMS counts 29 Medicare patients who saw Dr. Merjanian in 2024. The largest group is under 65, with 13 patients. 75% of them have chronic kidney disease, and 75% have diabetes. 55% are also on Medicaid. Their average risk score is 6.33, 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. Merjanian's median patient age at 67, with 44% women.
Dr. Merjanian's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Merjanian's Medicare patients by sex, 2024
- Women1448%
- Men1552%
Chronic conditions among Dr. Merjanian's Medicare patients, 2024
- Chronic kidney disease75%
- Diabetes75%
- High blood pressure75%
- High cholesterol75%
- Heart failure48%
Share of Medicare patients with each condition. A patient can have several.
Dr. Merjanian's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 67
Patient panel by sex, all payers
- Women44%
- Men55%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Raffi B. Merjanian wrote 1,964 Medicare Part D claims in 2024
In 2024, Dr. Merjanian wrote 1,964 Medicare Part D claims for 341 patients. 94% of them were for generic drugs. CMS names the drug for 1,807 of them, across 34 drugs with 11 or more claims each, at $110,863 in total drug cost. In 2023, CMS named 1,793 claims across 37 drugs.
Dr. Merjanian's Part D claims by kind of drug, 2024
- Generic1,854 claims94%
- Brand-name and other110 claims6%
Dr. Merjanian'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. Merjanian's Part D claims, 2024
- Antibiotics1%24 of 1,964 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: 1,7932024: 1,8071%
Drugs named by CMS: 34 in 2024, 37 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
How Dr. Raffi B. Merjanian takes part in Medicare
Dr. Merjanian accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Raffi B. Merjanian has 1 publication on record
Dmand AI links 1 paper to Dr. Merjanian.
Recent publications by Dr. Merjanian
See who Dr. Merjanian researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Merjanian works with, so you can find a warm path to the right nephrologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Raffi B. Merjanian received $18 in industry payments in 2017
CMS Open Payments shows 1 general payment to Dr. Merjanian from 1 drug or device company in 2017. Food and beverage make up the largest share, 100% of the total. Amgen Inc. paid the most, $18.
Companies that paid Dr. Merjanian the most, 2017 to 2017
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Raffi B. Merjanian has 1 award and honors on record
Dmand AI lists 1 award for Dr. Merjanian, most recently CMS Stage 1 2012 in 2011.
Awards and honors for Dr. Merjanian
- 2011
- CMS Stage 1 2012
Source: Dmand AI Professional Profile Data
Dr. Raffi B. Merjanian graduated from David Geffen School of Medicine at UCLA
Dr. Merjanian graduated from David Geffen School of Medicine at UCLA in 2000.
- Medical school
- Board certified in nephrology
Source: Dmand AI Professional Profile Data
Dr. Raffi B. Merjanian accepts plans from 2 insurance carriers
Dr. Merjanian is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Kaiser Permanente
- CMS Medicare
Plan types Dr. Merjanian accepts, by number of carriers
- EPO1
- HMO1
- Medicare1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Raffi B. Merjanian'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 DataDmand AI Org Hierarchy 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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| 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. Raffi B. Merjanian
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. Raffi B. Merjanian's NPI number?
Dr. Raffi B. Merjanian's NPI number is 1649347477. It was assigned on November 29, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Raffi B. Merjanian?
Dr. Raffi B. Merjanian is a nephrologist in Los Angeles, California. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).
Where does Dr. Raffi B. Merjanian practice?
Dr. Merjanian practices at 950 S Eastern Ave, Los Angeles, CA 90022. Dr. Merjanian's primary practice is Downey Landing Dialysis Center in Los Angeles, California. Dmand AI also links Dr. Merjanian to 2 dialysis centers and 1 group practice or clinic.
What is Dr. Raffi B. Merjanian's office phone number?
The practice phone on file for Dr. Merjanian is (562) 862-0001.
What is Dr. Raffi B. Merjanian's medical license number?
Dr. Merjanian holds California license A77348.
Which hospitals is Dr. Raffi B. Merjanian affiliated with?
Dr. Merjanian is affiliated with Downey Medical Center.
What medical group is Dr. Raffi B. Merjanian part of?
Dr. Merjanian is linked to Southern California Permanente Medical Group.
Does Dr. Raffi B. Merjanian accept Medicare?
Yes. CMS data shows Dr. Merjanian billed Medicare for 16 services in 2024, and Dr. Merjanian accepts Medicare assignment.
How many Medicare patients does Dr. Raffi B. Merjanian see?
CMS counts 29 Medicare patients who saw Dr. Merjanian in 2024, with an average age of 65.
Is Dr. Raffi B. Merjanian board certified?
Yes. Dr. Merjanian is board certified in nephrology by the American Board of Internal Medicine.
Show 7 more questionsShow fewer questions
What services does Dr. Raffi B. Merjanian bill to Medicare?
In 2024, Dr. Merjanian's most billed Medicare services were office visit, established patient (99214).
Where did Dr. Raffi B. Merjanian go to medical school?
Dr. Merjanian graduated from David Geffen School of Medicine at UCLA in 2000.
What drugs does Dr. Raffi B. Merjanian prescribe most?
In 2024 Medicare Part D data, Dr. Merjanian's most prescribed drugs by claims were Losartan Potassium, Amlodipine Besylate and Atorvastatin Calcium.
Has Dr. Raffi B. Merjanian received payments from drug or device companies?
CMS Open Payments shows $18 in general payments to Dr. Merjanian from 1 company from 2017 to 2017. The largest total came from Amgen Inc.
How long has Dr. Raffi B. Merjanian been practicing?
Dr. Merjanian graduated from medical school in 2000, 26 years ago.
Does Dr. Raffi B. Merjanian do research?
Dmand AI links 1 publication to Dr. Merjanian.
What insurance does Dr. Raffi B. Merjanian accept?
Dr. Merjanian is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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