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Dr. Merin M. Stephen, MD
NPI1295998235
- Medicare services, 2021
- 370
- Part D claims, 2024
- 594
- Publications
- 2
- Hospital affiliations
- 1
- Industry payments
- $1,455
- Practice address
- 3440 E La Palma Ave, Anaheim, CA 92806
- Practice phone
- Call (714) 279-4000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Stephen's professional email, personal email and mobile number
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Dr. Merin M. Stephen is a hematologist and oncologist in Anaheim, California
Dr. Stephen practices at Orange County - Anaheim Medical Center in Anaheim, California, part of Kaiser Permanente.
Dr. Stephen's NPI, 1295998235, was assigned on July 9, 2008. Dr. Stephen graduated from University of Illinois College of Medicine - Chicago in 2008. Dr. Stephen holds California license 137065.
NPI and contact details
- NPI
- 1295998235NPI Registry (opens in a new tab)
- NPI enumeration date
- July 9, 2008
- NPI status
- Active
- Practice phone
- (714) 279-4000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 44
- Medical school graduation
- 2008
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Merin M. Stephen practices at Orange County - Anaheim Medical Center in Anaheim, California
Dr. Stephen's primary practice is Orange County - Anaheim Medical Center, at 3440 E La Palma Ave, Anaheim, CA 92806 in Orange County. The practice phone is (714) 279-4000.
- Orange County - Anaheim Medical Center3440 E La Palma Ave, Anaheim, CA 92806 · Orange CountyPhone(714) 279-4000
Source: Dmand AI Affiliation Data
Dr. Merin M. Stephen is affiliated with 2 sites of care and 2 medical groups
Dr. Stephen's primary practice is Orange County - Anaheim Medical Center in Anaheim, California, part of Kaiser Permanente. The medical group on file is Southern California Permanente Medical Group. Dmand AI also links Dr. Stephen to 1 more group practice or clinic and 1 medical group, each named with a free account.
Southern California Permanente Medical Group1 group practice or clinicName with a free account1 medical groupName with a free account
See all 4 affiliations for Dr. StephenSources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Merin M. Stephen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Stephen practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Orange County - Anaheim Medical Center | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Merin M. Stephen is one of 1,502 hematologists and oncologists in California
Hematology and oncology is Dr. Stephen's primary specialty in the NPI Registry, under taxonomy code 207RH0003X. Dr. Stephen is board certified in hematology by the American Board of Internal Medicine. Dmand AI has Dr. Stephen's licenses on file in 3 states: California, Massachusetts and Rhode Island.
Specialties and state licenses
- Hematology and oncology, CaliforniaPrimary
- Massachusetts license
- Rhode Island license
Clinical focus
Dmand AI lists breast cancer, chronic leukemia, colorectal cancer, lung cancer, lymphoma and multiple myeloma among the conditions Dr. Stephen treats.
Hematologists and oncologists near Dr. Stephen
Counts of hematologists and oncologists with a Dmand AI profile, by place and practice. Each opens the list.
1,502hematologists and oncologists in California23hematologists and oncologists in Anaheim2hematologists and oncologists at Orange County - Anaheim Medical Center
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Merin M. Stephen billed Medicare for 370 services in 2021
CMS data shows 370 Medicare services from Dr. Stephen across 6 procedure codes in 2021. Medicare paid $35,355 for them.
Medicare services, 2021370
Paid by Medicare$35,355
Procedure codes6
Dr. Stephen's Medicare services by type, 2020 to 2021
- 2020
- 2021
- Office and hospital visits
- 2020: 7672021: 33057%
- Tests and treatments
- 2020: 942021: 4057%
Where Dr. Stephen's Medicare services took place, 2021
- In an office26070%
- In a facility11030%
Dr. Stephen compared with the California median for hematologists and oncologists, 2021
- Dr. Stephen
- California median
- Medicare services
- 370vs 93260% below
- Part D claims
- 440vs 39412% above
Medians across 1,367 hematologists and oncologists in California with Dmand AI profiles that report each measure.
Dr. Stephen's most billed Medicare procedure codes, 2021
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. Stephen?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Stephen and other hematologists and oncologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Merin M. Stephen's patients have a median age of 63
Across all payers, Dmand AI patient panel data puts Dr. Stephen's median patient age at 63, with 72% women.
Dr. Stephen's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 63
Patient panel by sex, all payers
- Women72%
- Men28%
Source: Dmand AI Patient Panel Data
Dr. Merin M. Stephen wrote 594 Medicare Part D claims in 2024
In 2024, Dr. Stephen wrote 594 Medicare Part D claims for 124 patients. 79% of them were for generic drugs. CMS names the drug for 440 of them, across 14 drugs with 11 or more claims each, at $693,833 in total drug cost. In 2023, CMS named 390 claims across 12 drugs.
Part D claims, 2024594
Drugs named by CMS14
Total drug cost$693,833
Part D patients124
Dr. Stephen's Part D claims by kind of drug, 2024
- Generic467 claims79%
- Brand-name127 claims21%
Dr. Stephen'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. Stephen's Part D claims, 2024
- Opioids2%11 of 594 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: 3902024: 44013%
Drugs named by CMS: 14 in 2024, 12 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. Merin M. Stephen has 2 publications on record
Dmand AI links 2 papers to Dr. Stephen, published from 2014 to 2021. Dr. Stephen's most frequent co-authors are Debbie A. Aizenberg, MD, Jorge J. Castillo, MD and Maggie A. Kuhn, MD.
Papers2
Years published2014 to 2021
Dr. Stephen's most frequent co-authors
- Debbie A. Aizenberg, MD1 shared paper
- Jorge J. Castillo, MD1 shared paper
- Maggie A. Kuhn, MD1 shared paper
Recent publications by Dr. Stephen
Hematologic NeoplasmsHodgkin DiseaseLeukemia
See who Dr. Stephen researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Stephen works with, so you can find a warm path to the right hematologists and oncologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Merin M. Stephen received $1,455 in industry payments from 2016 to 2024
CMS Open Payments shows 18 general payments to Dr. Stephen from 11 drug and device companies from 2016 to 2024. Food and beverage make up the largest share, 91% of the total. Astellas Pharma US Inc paid the most, $361.
General payments to Dr. Stephen by program year, 2016 to 2024
General payments to Dr. Stephen by kind, 2016 to 2024
$1.5Kin total
- Food and beverage$1,32391%
- Education$1329%
Companies that paid Dr. Stephen the most, 2016 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Merin M. Stephen graduated from University of Illinois College of Medicine - Chicago
Dr. Stephen graduated from University of Illinois College of Medicine - Chicago in 2008.
- Medical school
- Board certified in hematology
- Board certified in medical oncology
Source: Dmand AI Professional Profile Data
Dr. Merin M. Stephen accepts plans from 7 insurance carriers
Dr. Stephen is in network with 7 carriers, including Blue Cross Blue Shield of Michigan, Kaiser Permanente and Blue Cross Blue Shield of Massachusetts. PPO plans come from the most carriers, 5. Check the plan with the practice before a visit.
- Blue Cross Blue Shield of Michigan
- Kaiser Permanente
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Regence Health Plans
- Elevance
- NV State Medicaid
Plan types Dr. Stephen accepts, by number of carriers
- PPO5
- Medicare4
- HMO2
- POS2
- EPO1
- Medicaid1
Source: Dmand AI Insurance Network Data
Sources for Dr. Merin M. Stephen'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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand 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 Data |
| 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) |
| 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) |
| 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. Merin M. Stephen
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. Merin M. Stephen's NPI number?
Dr. Merin M. Stephen's NPI number is 1295998235. It was assigned on July 9, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. Merin M. Stephen?
Dr. Merin M. Stephen is a hematologist and oncologist in Anaheim, California. The primary specialty in the NPI Registry is Hematology & Oncology Physician (taxonomy code 207RH0003X).
Where does Dr. Merin M. Stephen practice?
Dr. Stephen practices at 3440 E La Palma Ave, Anaheim, CA 92806. Dr. Stephen's primary practice is Orange County - Anaheim Medical Center in Anaheim, California, part of Kaiser Permanente. Dmand AI also links Dr. Stephen to 1 group practice or clinic and 1 medical group.
What is Dr. Merin M. Stephen's office phone number?
The practice phone on file for Dr. Stephen is (714) 279-4000.
What is Dr. Merin M. Stephen's medical license number?
Dr. Stephen holds California license 137065, one of the licenses on file in 3 states.
Which states has Dr. Merin M. Stephen been licensed in?
Dmand AI has state licenses on file for Dr. Stephen in California (2015 to 2026), Massachusetts (2011 to 2016) and Rhode Island (2012 to 2015).
Which hospitals is Dr. Merin M. Stephen affiliated with?
Dr. Stephen practices at Orange County - Anaheim Medical Center in Anaheim, California.
What medical group is Dr. Merin M. Stephen part of?
Dr. Stephen is linked to Southern California Permanente Medical Group. Dmand AI links Dr. Stephen to 1 more medical group.
Does Dr. Merin M. Stephen accept Medicare?
Yes. CMS data shows Dr. Stephen billed Medicare for 370 services in 2021.
Is Dr. Merin M. Stephen board certified?
Yes. Dr. Stephen is board certified in hematology by the American Board of Internal Medicine.
Show 8 more questionsShow fewer questions
What services does Dr. Merin M. Stephen bill to Medicare?
In 2021, Dr. Stephen's most billed Medicare services were office visit, established patient (99214), office visit, established patient (99215) and infusion or chemotherapy administration (96372).
Where did Dr. Merin M. Stephen go to medical school?
Dr. Stephen graduated from University of Illinois College of Medicine - Chicago in 2008.
What drugs does Dr. Merin M. Stephen prescribe most?
In 2024 Medicare Part D data, Dr. Stephen's most prescribed drugs by claims were Anastrozole, Hydroxyurea and Tamoxifen Citrate.
Has Dr. Merin M. Stephen received payments from drug or device companies?
CMS Open Payments shows $1,455 in general payments to Dr. Stephen from 11 companies from 2016 to 2024. The largest total came from Astellas Pharma US Inc.
How long has Dr. Merin M. Stephen been practicing?
Dr. Stephen graduated from medical school in 2008, 18 years ago.
Does Dr. Merin M. Stephen do research?
Dmand AI links 2 publications to Dr. Stephen, published from 2014 to 2021.
Who does Dr. Merin M. Stephen publish with?
Dr. Stephen's most frequent co-authors are Debbie A. Aizenberg, MD (1 shared paper), Jorge J. Castillo, MD (1 shared paper) and Maggie A. Kuhn, MD (1 shared paper).
What insurance does Dr. Merin M. Stephen accept?
Dr. Stephen is in network with 7 carriers, including Blue Cross Blue Shield of Michigan, Kaiser Permanente and Blue Cross Blue Shield of Massachusetts. PPO plans come from the most carriers, 5. Check the plan with the practice before a visit.
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