Dr. Robert Ara Petrossian, MD
- Medicare services, 2024
- 3,333
- Medicare patients, 2024
- 429
- Part D claims, 2024
- 626
- Hospital affiliations
- 5
- Industry payments
- $6,090
- Practice address
- 12855 N Forty Dr, Saint Louis, MO 63141
- Practice phone
- Call (314) 567-6071
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Neurosurgery of St Louis
Saint Louis, Missouri
Find Dr. Petrossian'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. Robert Ara Petrossian is a urologist in Saint Louis, Missouri
Dr. Petrossian practices at Neurosurgery of St Louis in Saint Louis, Missouri.
Dr. Petrossian's NPI, 1912436015, was assigned on June 12, 2017. Dr. Petrossian graduated from Oakland Univ, William Beaumont School of Medicine in 2017. Dr. Petrossian holds Missouri license 2023045072.
- NPI
- 1912436015NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0446521819
- NPI enumeration date
- June 12, 2017
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (314) 567-6071
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 35
- Medical school graduation
- 2017
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Robert Ara Petrossian practices at Neurosurgery of St Louis in Saint Louis, Missouri
Dr. Petrossian's primary practice is Neurosurgery of St Louis, at 12855 N Forty Dr, Saint Louis, MO 63141 in Saint Louis County. The practice phone is (314) 567-6071.
- Neurosurgery of St Louis12855 N Forty Dr, Saint Louis, MO 63141 · Saint Louis CountyPhone(314) 567-6071
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Robert Ara Petrossian is affiliated with 8 sites of care and 2 medical groups
Dr. Petrossian's primary practice is Neurosurgery of St Louis in Saint Louis, Missouri. Dr. Petrossian is also affiliated with St. Luke's Hospital. The medical group on file is OSF Multi-Specialty Group. Dmand AI also links Dr. Petrossian to 4 more hospitals, 2 group practices and clinics and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Robert Ara Petrossian's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Petrossian practices, 7 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Neurosurgery of St Louis | Available with a free account |
| +7 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Robert Ara Petrossian is one of 246 urologists in Missouri
Urology is Dr. Petrossian's primary specialty in the NPI Registry, under taxonomy code 208800000X. Dr. Petrossian is licensed in Missouri.
Specialties and state licenses
- Urology, MissouriPrimary
Urologists near Dr. Petrossian
Counts of urologists 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. Robert Ara Petrossian billed Medicare for 3,333 services in 2024
CMS data shows 3,333 Medicare services from Dr. Petrossian across 22 procedure codes in 2024, for 429 Medicare patients. Medicare paid $92,756 for them.
Dr. Petrossian's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Other services
- 2023: 02024: 1,787
- Surgery
- 2023: 7902024: 64718%
- Lab and pathology
- 2023: 02024: 447
- Office and hospital visits
- 2023: 1,1692024: 43063%
- Imaging
- 2023: 342024: 2235%
- Drugs given in the office
- 2023: 3472024: 0100%
- Tests and treatments
- 2023: 4662024: 0100%
Where Dr. Petrossian's Medicare services took place, 2024
- In an office3,24297%
- In a facility913%
Dr. Petrossian compared with the Missouri median for urologists, 2024
- Dr. Petrossian
- Missouri median
- Medicare services
- 3,333vs 1,5342.2 times
- Medicare patients
- 429vs 50014% below
- Part D claims
- 550vs 79931% below
Medians across 252 urologists in Missouri with Dmand AI profiles that report each measure.
Dr. Petrossian'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. Petrossian?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Petrossian and other urologists in Missouri.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Robert Ara Petrossian treated 429 Medicare patients in 2024, average age 75
CMS counts 429 Medicare patients who saw Dr. Petrossian in 2024. The largest group is 65 to 74, with 193 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 10% are also on Medicaid. Their average risk score is 1.45, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Petrossian's median patient age at 69, with 22% women.
Dr. Petrossian's Medicare patients by age, 2024
Dr. Petrossian's Medicare patients by sex, 2024
- Women10625%
- Men32375%
Chronic conditions among Dr. Petrossian's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis54%
- Diabetes38%
- Chronic kidney disease37%
- Ischemic heart disease35%
- Atrial fibrillation26%
- Anxiety23%
Share of Medicare patients with each condition. A patient can have several.
Dr. Petrossian's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 69
Patient panel by sex, all payers
- Women22%
- Men78%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Robert Ara Petrossian wrote 626 Medicare Part D claims in 2024
In 2024, Dr. Petrossian wrote 626 Medicare Part D claims for 284 patients. 93% of them were for generic drugs. CMS names the drug for 550 of them, across 13 drugs with 11 or more claims each, at $25,567 in total drug cost. In 2023, CMS named 542 claims across 13 drugs.
Dr. Petrossian's Part D claims by kind of drug, 2024
- Generic580 claims93%
- Brand-name46 claims7%
Dr. Petrossian'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. Petrossian's Part D claims, 2024
- Opioids6%35 of 626 claims
- Antibiotics22%139 of 626 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: 5422024: 5501%
Drugs named by CMS: 13 in 2024, 13 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. Robert Ara Petrossian takes part in Medicare
Dr. Petrossian 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. Robert Ara Petrossian received $6,090 in industry payments from 2018 to 2025
CMS Open Payments shows 108 general payments to Dr. Petrossian from 27 drug and device companies from 2018 to 2025. Food and beverage make up the largest share, 59% of the total. Boston Scientific Corporation paid the most, $2,819.
General payments to Dr. Petrossian by program year, 2018 to 2025
General payments to Dr. Petrossian by kind, 2018 to 2025
- Food and beverage$3,60059%
- Travel and lodging$2,35539%
- Education$1352%
Companies that paid Dr. Petrossian the most, 2018 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Robert Ara Petrossian graduated from Oakland Univ, William Beaumont School of Medicine
Dr. Petrossian graduated from Oakland Univ, William Beaumont School of Medicine in 2017.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Robert Ara Petrossian'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) |
| 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. Robert Ara Petrossian
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. Robert Ara Petrossian's NPI number?
Dr. Robert Ara Petrossian's NPI number is 1912436015. It was assigned on June 12, 2017, and it is active in the NPI Registry.
What kind of doctor is Dr. Robert Ara Petrossian?
Dr. Robert Ara Petrossian is a urologist in Saint Louis, Missouri. The primary specialty in the NPI Registry is Urology Physician (taxonomy code 208800000X).
Where does Dr. Robert Ara Petrossian practice?
Dr. Petrossian practices at 12855 N Forty Dr, Saint Louis, MO 63141. Dr. Petrossian's primary practice is Neurosurgery of St Louis in Saint Louis, Missouri. Dmand AI also links Dr. Petrossian to 4 hospitals, 2 group practices and clinics and 1 medical group.
What is Dr. Robert Ara Petrossian's office phone number?
The practice phone on file for Dr. Petrossian is (314) 567-6071.
What is Dr. Robert Ara Petrossian's medical license number?
Dr. Petrossian holds Missouri license 2023045072.
Which hospitals is Dr. Robert Ara Petrossian affiliated with?
Dr. Petrossian is affiliated with St. Luke's Hospital. Dmand AI links Dr. Petrossian to 4 more hospitals.
What medical group is Dr. Robert Ara Petrossian part of?
Dr. Petrossian is linked to OSF Multi-Specialty Group. Dmand AI links Dr. Petrossian to 1 more medical group.
Does Dr. Robert Ara Petrossian accept Medicare?
Yes. CMS data shows Dr. Petrossian billed Medicare for 3,333 services in 2024, and Dr. Petrossian accepts Medicare assignment.
How many Medicare patients does Dr. Robert Ara Petrossian see?
CMS counts 429 Medicare patients who saw Dr. Petrossian in 2024, with an average age of 75.
What services does Dr. Robert Ara Petrossian bill to Medicare?
In 2024, Dr. Petrossian's most billed Medicare services were medicare temporary code (Q9967), lab and pathology test (81003) and surgery: urinary system (51798).
Show 4 more questionsShow fewer questions
Where did Dr. Robert Ara Petrossian go to medical school?
Dr. Petrossian graduated from Oakland Univ, William Beaumont School of Medicine in 2017.
What drugs does Dr. Robert Ara Petrossian prescribe most?
In 2024 Medicare Part D data, Dr. Petrossian's most prescribed drugs by claims were Tamsulosin HCl, Finasteride and Oxybutynin Chloride ER.
Has Dr. Robert Ara Petrossian received payments from drug or device companies?
CMS Open Payments shows $6,090 in general payments to Dr. Petrossian from 27 companies from 2018 to 2025. The largest total came from Boston Scientific Corporation.
How long has Dr. Robert Ara Petrossian been practicing?
Dr. Petrossian graduated from medical school in 2017, 9 years ago.
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