Dr. Razmik Thomassian, MD
- Medicare services, 2023
- 32
- Part D claims, 2024
- 193
- Industry payments
- $628
- Affiliated sites
- 2
- Medical group
- 1
- Practice address
- 1227 Buena Vista St Ste F, Duarte, CA 91010
- Practice phone
- Call (877) 254-4496
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Monrovia Internal Medicine and Primary Care
Urgent Care Center · Duarte, California
Find Dr. Thomassian'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. Razmik Thomassian is an internist in Duarte, California
Dr. Thomassian practices at Monrovia Internal Medicine and Primary Care in Duarte, California.
Dr. Thomassian's NPI, 1518351733, was assigned on March 25, 2015. Dr. Thomassian holds California license A152242.
- NPI
- 1518351733NPI Registry (opens in a new tab)
- NPI enumeration date
- March 25, 2015
- NPI status
- Active
- Practice phone
- (877) 254-4496
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 37
- Medical school graduation
- 2015
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Razmik Thomassian practices at Monrovia Internal Medicine and Primary Care in Duarte, California
Dr. Thomassian's primary practice is Monrovia Internal Medicine and Primary Care, at 1227 Buena Vista St Ste F, Duarte, CA 91010. The practice phone is (877) 254-4496.
- Monrovia Internal Medicine and Primary Care1227 Buena Vista St Ste F, Duarte, CA 91010Phone(877) 254-4496
Source: Dmand AI Affiliation Data
Dr. Razmik Thomassian is affiliated with 2 sites of care and 1 medical group
Dr. Thomassian's primary practice is Monrovia Internal Medicine and Primary Care in Duarte, California. Dmand AI also links Dr. Thomassian to 1 group practice or clinic and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Razmik Thomassian's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Thomassian practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Monrovia Internal Medicine and Primary Care | 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. Razmik Thomassian is one of 16,751 internists in California
Internal medicine is Dr. Thomassian's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Thomassian is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Internists near Dr. Thomassian
Counts of internists 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. Razmik Thomassian billed Medicare for 32 services in 2023
CMS data shows 32 Medicare services from Dr. Thomassian across 1 procedure code in 2023, all of them office visits. Medicare paid $770 for them. Every service was in an office.
Dr. Thomassian's Medicare services by type, 2022 to 2023
- 2022
- 2023
- Office and hospital visits
- 2022: 152023: 32113%
Dr. Thomassian compared with the California median for internists, 2023
- Dr. Thomassian
- California median
- Medicare services
- 32vs 36191% below
- Part D claims
- 37vs 42191% below
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Thomassian's most billed Medicare procedure codes, 2023
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. Thomassian?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Thomassian and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Razmik Thomassian's patients have a median age of 41
Across all payers, Dmand AI patient panel data puts Dr. Thomassian's median patient age at 41, with 60% women.
Dr. Thomassian's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 41
Patient panel by sex, all payers
- Women60%
- Men39%
Source: Dmand AI Patient Panel Data
Dr. Razmik Thomassian wrote 193 Medicare Part D claims in 2024
In 2024, Dr. Thomassian wrote 193 Medicare Part D claims for 70 patients. 93% of them were for generic drugs. CMS names the drug for 37 of them, across 3 drugs with 11 or more claims each, at $1,065 in total drug cost. In 2023, CMS named 83 claims across 6 drugs.
Dr. Thomassian's Part D claims by kind of drug, 2024
- Generic179 claims93%
- Brand-name14 claims7%
Dr. Thomassian'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. Thomassian's Part D claims, 2024
- Antibiotics17%33 of 193 claims
- Antipsychotics, patients 65 and over7%13 of 193 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: 832024: 3755%
Drugs named by CMS: 3 in 2024, 6 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. Razmik Thomassian received $628 in industry payments from 2017 to 2021
CMS Open Payments shows 36 general payments to Dr. Thomassian from 12 drug and device companies from 2017 to 2021. Food and beverage make up the largest share, 100% of the total. Bristol-Myers Squibb Company paid the most, $160.
General payments to Dr. Thomassian by program year, 2017 to 2021
Companies that paid Dr. Thomassian the most, 2017 to 2021
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Razmik Thomassian'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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. Razmik Thomassian
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. Razmik Thomassian's NPI number?
Dr. Razmik Thomassian's NPI number is 1518351733. It was assigned on March 25, 2015, and it is active in the NPI Registry.
What kind of doctor is Dr. Razmik Thomassian?
Dr. Razmik Thomassian is an internist in Duarte, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Razmik Thomassian practice?
Dr. Thomassian practices at 1227 Buena Vista St Ste F, Duarte, CA 91010. Dr. Thomassian's primary practice is Monrovia Internal Medicine and Primary Care in Duarte, California. Dmand AI also links Dr. Thomassian to 1 group practice or clinic and 1 medical group.
What is Dr. Razmik Thomassian's office phone number?
The practice phone on file for Dr. Thomassian is (877) 254-4496.
What is Dr. Razmik Thomassian's medical license number?
Dr. Thomassian holds California license A152242.
Does Dr. Razmik Thomassian accept Medicare?
Yes. CMS data shows Dr. Thomassian billed Medicare for 32 services in 2023.
What services does Dr. Razmik Thomassian bill to Medicare?
In 2023, Dr. Thomassian's most billed Medicare services were office visit, established patient (99212).
What drugs does Dr. Razmik Thomassian prescribe most?
In 2024 Medicare Part D data, Dr. Thomassian's most prescribed drugs by claims were Celecoxib, Quetiapine Fumarate and Azithromycin.
Has Dr. Razmik Thomassian received payments from drug or device companies?
CMS Open Payments shows $628 in general payments to Dr. Thomassian from 12 companies from 2017 to 2021. The largest total came from Bristol-Myers Squibb Company.
How long has Dr. Razmik Thomassian been practicing?
Dr. Thomassian graduated from medical school in 2015, 11 years ago.
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