Dr. Steven Peter Marshak, MD
- Medicare services, 2024
- 1,535
- Medicare patients, 2024
- 438
- Part D claims, 2024
- 3,711
- Industry payments
- $7,664
- Affiliated sites
- 3
- Practice address
- 9900 Belward Campus Dr, Rockville, MD 20850
- Practice phone
- Call (571) 366-8850
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Privia Medical Group
Rockville, Maryland
Find Dr. Marshak'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. Steven Peter Marshak is an internist in Rockville, Maryland
Dr. Marshak practices at Privia Medical Group in Rockville, Maryland.
Dr. Marshak's NPI, 1730110305, was assigned on July 5, 2006. Dr. Marshak graduated from Georgetown University School of Medicine in 1995. Dr. Marshak holds Maryland license D0068171.
- NPI
- 1730110305NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6709879703
- NPI enumeration date
- July 5, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (571) 366-8850
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 57
- Medical school graduation
- 1995
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Steven Peter Marshak practices at Privia Medical Group in Rockville, Maryland
Dr. Marshak's primary practice is Privia Medical Group, at 9900 Belward Campus Dr, Rockville, MD 20850 in Montgomery County. The practice phone is (571) 366-8850.
- Privia Medical Group9900 Belward Campus Dr, Rockville, MD 20850 · Montgomery CountyPhone(571) 366-8850
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Steven Peter Marshak is affiliated with 4 sites of care and 2 medical groups
Dr. Marshak's primary practice is Privia Medical Group in Rockville, Maryland. The medical group on file is Privia Medical Group. Dmand AI also links Dr. Marshak to 2 more group practices and clinics, 1 physician office 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. Steven Peter Marshak's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Marshak practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Privia Medical Group | Available with a free account |
| +3 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Steven Peter Marshak is one of 3,320 internists in Maryland
Internal medicine is Dr. Marshak's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dmand AI has Dr. Marshak's licenses on file in 2 states: Maryland and Virginia.
Specialties and state licenses
- Internal medicine, MarylandPrimary
- Virginia license
Internists near Dr. Marshak
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. Steven Peter Marshak billed Medicare for 1,535 services in 2024
CMS data shows 1,535 Medicare services from Dr. Marshak across 15 procedure codes in 2024, for 438 Medicare patients. Medicare paid $114,242 for them. Every service was in an office.
Dr. Marshak's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 5592024: 86154%
- Other services
- 2023: 4172024: 46211%
- Tests and treatments
- 2023: 972024: 10710%
- Surgery
- 2023: 1882024: 10544%
Dr. Marshak compared with the Maryland median for internists, 2024
- Dr. Marshak
- Maryland median
- Medicare services
- 1,535vs 6562.3 times
- Medicare patients
- 438vs 25175% above
- Part D claims
- 3,014vs 3099.8 times
Medians across 3,215 internists in Maryland with Dmand AI profiles that report each measure.
Dr. Marshak'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. Marshak and other internists in Maryland.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Steven Peter Marshak treated 438 Medicare patients in 2024, average age 75
CMS counts 438 Medicare patients who saw Dr. Marshak in 2024. The largest group is 65 to 74, with 213 patients. 75% of them have high cholesterol, and 63% have high blood pressure. Their average risk score is 0.94, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Marshak's median patient age at 55, with 40% women.
Dr. Marshak's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Marshak's Medicare patients by sex, 2024
- Women19845%
- Men24055%
Chronic conditions among Dr. Marshak's Medicare patients, 2024
- High cholesterol75%
- High blood pressure63%
- Arthritis32%
- Ischemic heart disease23%
- Diabetes22%
- Anxiety20%
- Chronic kidney disease18%
- Mood disorders15%
Share of Medicare patients with each condition. A patient can have several.
Dr. Marshak's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 55
Patient panel by sex, all payers
- Women40%
- Men59%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Steven Peter Marshak wrote 3,711 Medicare Part D claims in 2024
In 2024, Dr. Marshak wrote 3,711 Medicare Part D claims for 381 patients. 90% of them were for generic drugs. CMS names the drug for 3,014 of them, across 71 drugs with 11 or more claims each, at $89,743 in total drug cost. In 2023, CMS named 2,448 claims across 64 drugs.
Dr. Marshak's Part D claims by kind of drug, 2024
- Generic3,349 claims90%
- Brand-name350 claims9%
- Other12 claims0%
Dr. Marshak'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. Marshak's Part D claims, 2024
- Opioids2%65 of 3,711 claims
- Antibiotics3%110 of 3,711 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: 2,4482024: 3,01423%
Drugs named by CMS: 71 in 2024, 64 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
Dr. Steven Peter Marshak offers telehealth to Medicare patients
Dr. Marshak accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Marshak as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Steven Peter Marshak received $7,664 in industry payments from 2016 to 2025
CMS Open Payments shows 408 general payments to Dr. Marshak from 56 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Novo Nordisk Inc paid the most, $1,162.
General payments to Dr. Marshak by program year, 2016 to 2025
General payments to Dr. Marshak by kind, 2016 to 2025
- Food and beverage$7,652100%
- Education$120%
Companies that paid Dr. Marshak the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Steven Peter Marshak graduated from Georgetown University School of Medicine
Dr. Marshak graduated from Georgetown University School of Medicine in 1995.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Steven Peter Marshak'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. Steven Peter Marshak
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. Steven Peter Marshak's NPI number?
Dr. Steven Peter Marshak's NPI number is 1730110305. It was assigned on July 5, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Steven Peter Marshak?
Dr. Steven Peter Marshak is an internist in Rockville, Maryland. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Steven Peter Marshak practice?
Dr. Marshak practices at 9900 Belward Campus Dr, Rockville, MD 20850. Dr. Marshak's primary practice is Privia Medical Group in Rockville, Maryland. Dmand AI also links Dr. Marshak to 2 group practices and clinics, 1 physician office and 1 medical group.
What is Dr. Steven Peter Marshak's office phone number?
The practice phone on file for Dr. Marshak is (571) 366-8850.
What is Dr. Steven Peter Marshak's medical license number?
Dr. Marshak holds Maryland license D0068171, one of the licenses on file in 2 states.
Which states has Dr. Steven Peter Marshak been licensed in?
Dmand AI has state licenses on file for Dr. Marshak in Maryland and Virginia.
What medical group is Dr. Steven Peter Marshak part of?
Dr. Marshak is linked to Privia Medical Group. Dmand AI links Dr. Marshak to 1 more medical group.
Does Dr. Steven Peter Marshak accept Medicare?
Yes. CMS data shows Dr. Marshak billed Medicare for 1,535 services in 2024, and Dr. Marshak accepts Medicare assignment.
Does Dr. Steven Peter Marshak offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Marshak as offering telehealth services.
How many Medicare patients does Dr. Steven Peter Marshak see?
CMS counts 438 Medicare patients who saw Dr. Marshak in 2024, with an average age of 75.
Show 5 more questionsShow fewer questions
What services does Dr. Steven Peter Marshak bill to Medicare?
In 2024, Dr. Marshak's most billed Medicare services were office visit, established patient (99214), office visit, established patient (99213) and medicare service (G0439).
Where did Dr. Steven Peter Marshak go to medical school?
Dr. Marshak graduated from Georgetown University School of Medicine in 1995.
What drugs does Dr. Steven Peter Marshak prescribe most?
In 2024 Medicare Part D data, Dr. Marshak's most prescribed drugs by claims were Atorvastatin Calcium, Levothyroxine Sodium and Amlodipine Besylate.
Has Dr. Steven Peter Marshak received payments from drug or device companies?
CMS Open Payments shows $7,664 in general payments to Dr. Marshak from 56 companies from 2016 to 2025. The largest total came from Novo Nordisk Inc.
How long has Dr. Steven Peter Marshak been practicing?
Dr. Marshak graduated from medical school in 1995, 31 years ago.
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