Dr. Mihai Merzianu, MD
- Medicare services, 2024
- 827
- Medicare patients, 2024
- 174
- Hospital affiliations
- 1
- Industry payments
- $81
- Medical group
- 1
- Practice address
- 344 S Hauser Blvd, Los Angeles, CA 90036
- Practice phone
- Call (716) 845-2300
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Roswell Park Cancer Institute
Los Angeles, California
Find Dr. Merzianu's professional email, personal email and mobile number
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Dr. Mihai Merzianu is a pathologist in Los Angeles, California
Dr. Merzianu practices at Roswell Park Cancer Institute in Los Angeles, California.
Dr. Merzianu's NPI, 1245221001, was assigned on November 2, 2005. Dr. Merzianu graduated from University of Medicine and Pharmacy Timisoara in 1996. Dr. Merzianu holds New York license 002455-1.
- NPI
- 1245221001NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0042237067
- NPI enumeration date
- November 2, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (716) 845-2300
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 57
- Medical school graduation
- 1996
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Mihai Merzianu practices at Roswell Park Cancer Institute in Los Angeles, California
Dr. Merzianu's primary practice is Roswell Park Cancer Institute, at 344 S Hauser Blvd, Los Angeles, CA 90036 in Los Angeles County. The practice phone is (716) 845-2300.
- Roswell Park Cancer Institute344 S Hauser Blvd, Los Angeles, CA 90036 · Los Angeles CountyPhone(716) 845-2300
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Mihai Merzianu is affiliated with 2 sites of care and 1 medical group
Dr. Merzianu's primary practice is Roswell Park Cancer Institute in Los Angeles, California. Dr. Merzianu is also affiliated with Roswell Park Comprehensive Cancer Center. The medical group on file is Roswell Park Comprehensive Cancer Center.
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. Mihai Merzianu's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Merzianu practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Roswell Park Cancer Institute | 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. Mihai Merzianu is one of 1,354 pathologists in California
Anatomic pathology and clinical pathology is Dr. Merzianu's primary specialty in the NPI Registry, under taxonomy code 207ZP0102X. Dr. Merzianu is licensed in New York.
Specialties and state licenses
- Anatomic pathology and clinical pathology, New YorkPrimary
Pathologists near Dr. Merzianu
Counts of pathologists 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. Mihai Merzianu billed Medicare for 827 services in 2024
CMS data shows 827 Medicare services from Dr. Merzianu across 13 procedure codes in 2024, for 174 Medicare patients. Medicare paid $24,379 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Merzianu's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Lab and pathology
- 2023: 7042024: 82717%
Dr. Merzianu compared with the California median for pathologists, 2024
- Dr. Merzianu
- California median
- Medicare services
- 827vs 1,15328% below
- Medicare patients
- 174vs 44761% below
Medians across 1,094 pathologists in California with Dmand AI profiles that report each measure.
Dr. Merzianu'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.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Merzianu and other pathologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Mihai Merzianu treated 174 Medicare patients in 2024, average age 72
CMS counts 174 Medicare patients who saw Dr. Merzianu in 2024. The largest group is 65 to 74, with 91 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 20% are also on Medicaid. Their average risk score is 2.18, 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. Merzianu's median patient age at 68, with 58% women.
Dr. Merzianu's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Merzianu's Medicare patients by sex, 2024
- Women7744%
- Men9756%
Chronic conditions among Dr. Merzianu's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis41%
- Chronic kidney disease37%
- Diabetes30%
- Anxiety25%
- Ischemic heart disease25%
- Cancer24%
Share of Medicare patients with each condition. A patient can have several.
Dr. Merzianu's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 68
Patient panel by sex, all payers
- Women58%
- Men41%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
How Dr. Mihai Merzianu takes part in Medicare
Dr. Merzianu 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. Mihai Merzianu received $81 in industry payments from 2020 to 2024
CMS Open Payments shows 2 general payments to Dr. Merzianu from 2 drug and device companies from 2020 to 2024. Food and beverage make up the largest share, 100% of the total. Stemline Therapeutics Inc. paid the most, $45.
General payments to Dr. Merzianu by program year, 2020 to 2024
Companies that paid Dr. Merzianu the most, 2020 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Mihai Merzianu graduated from University of Medicine and Pharmacy Timisoara
Dr. Merzianu graduated from University of Medicine and Pharmacy Timisoara in 1996.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Mihai Merzianu'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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile 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. Mihai Merzianu
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. Mihai Merzianu's NPI number?
Dr. Mihai Merzianu's NPI number is 1245221001. It was assigned on November 2, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Mihai Merzianu?
Dr. Mihai Merzianu is a pathologist in Los Angeles, California. The primary specialty in the NPI Registry is Anatomic Pathology & Clinical Pathology Physician (taxonomy code 207ZP0102X).
Where does Dr. Mihai Merzianu practice?
Dr. Merzianu practices at 344 S Hauser Blvd, Los Angeles, CA 90036. Dr. Merzianu's primary practice is Roswell Park Cancer Institute in Los Angeles, California.
What is Dr. Mihai Merzianu's office phone number?
The practice phone on file for Dr. Merzianu is (716) 845-2300.
What is Dr. Mihai Merzianu's medical license number?
Dr. Merzianu holds New York license 002455-1.
Which hospitals is Dr. Mihai Merzianu affiliated with?
Dr. Merzianu is affiliated with Roswell Park Comprehensive Cancer Center.
What medical group is Dr. Mihai Merzianu part of?
Dr. Merzianu is linked to Roswell Park Comprehensive Cancer Center.
Does Dr. Mihai Merzianu accept Medicare?
Yes. CMS data shows Dr. Merzianu billed Medicare for 827 services in 2024, and Dr. Merzianu accepts Medicare assignment.
How many Medicare patients does Dr. Mihai Merzianu see?
CMS counts 174 Medicare patients who saw Dr. Merzianu in 2024, with an average age of 72.
What services does Dr. Mihai Merzianu bill to Medicare?
In 2024, Dr. Merzianu's most billed Medicare services were lab and pathology test (88341), lab and pathology test (88305) and lab and pathology test (88189).
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Where did Dr. Mihai Merzianu go to medical school?
Dr. Merzianu graduated from University of Medicine and Pharmacy Timisoara in 1996.
Has Dr. Mihai Merzianu received payments from drug or device companies?
CMS Open Payments shows $81 in general payments to Dr. Merzianu from 2 companies from 2020 to 2024. The largest total came from Stemline Therapeutics Inc.
How long has Dr. Mihai Merzianu been practicing?
Dr. Merzianu graduated from medical school in 1996, 30 years ago.
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