Dr. Daniel Jon Merenstein, MD
- Medicare services, 2024
- 293
- Medicare patients, 2024
- 217
- Part D claims, 2024
- 140
- Publications
- 115
- Clinical trials
- 2
- Practice address
- 3650 Joseph Siewick Dr, Fairfax, VA 22033
- Practice phone
- Call (703) 321-2609
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Inova Physician Partners
Fairfax, Virginia
Find Dr. Merenstein'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. Daniel Jon Merenstein is a family medicine physician in Fairfax, Virginia
Dr. Merenstein practices at Inova Physician Partners in Fairfax, Virginia.
Dr. Merenstein's NPI, 1780748822, was assigned on December 21, 2006. Dr. Merenstein graduated from Jefferson Medical College of Thomas Jefferson University in 1997. Dr. Merenstein holds Virginia license 0101058211.
- NPI
- 1780748822NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5597811026
- NPI enumeration date
- December 21, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (703) 321-2609
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 55
- Medical school graduation
- 1997
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Daniel Jon Merenstein practices at Inova Physician Partners in Fairfax, Virginia
Dr. Merenstein's primary practice is Inova Physician Partners, at 3650 Joseph Siewick Dr, Fairfax, VA 22033 in Fairfax County. The practice phone is (703) 321-2609.
- Inova Physician Partners3650 Joseph Siewick Dr, Fairfax, VA 22033 · Fairfax CountyPhone(703) 321-2609
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Daniel Jon Merenstein is affiliated with 3 sites of care and 4 medical groups
Dr. Merenstein's primary practice is Inova Physician Partners in Fairfax, Virginia. The medical group on file is Inova Urgent Care Center. Dmand AI also links Dr. Merenstein to 3 more medical groups and 2 group practices and clinics, 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. Daniel Jon Merenstein's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Merenstein practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Inova Physician Partners | Available with a free account |
| +2 more sites and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Daniel Jon Merenstein is one of 3,459 family medicine physicians in Virginia
Family medicine is Dr. Merenstein's primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dmand AI has Dr. Merenstein's licenses on file in 2 states: Virginia and District of Columbia.
Specialties and state licenses
- Family medicine, VirginiaPrimary
- District of Columbia license
Family medicine physicians near Dr. Merenstein
Counts of family medicine physicians 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. Daniel Jon Merenstein billed Medicare for 293 services in 2024
CMS data shows 293 Medicare services from Dr. Merenstein across 6 procedure codes in 2024, for 217 Medicare patients. Medicare paid $25,031 for them. Every service was in an office.
Dr. Merenstein's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1522024: 22347%
- Lab and pathology
- 2023: 542024: 576%
- Imaging
- 2023: 02024: 13
Dr. Merenstein compared with the Virginia median for family medicine physicians, 2024
- Dr. Merenstein
- Virginia median
- Medicare services
- 293vs 54346% below
- Medicare patients
- 217vs 217Close to median
- Part D claims
- 15vs 72198% below
Medians across 3,387 family medicine physicians in Virginia with Dmand AI profiles that report each measure.
Dr. Merenstein'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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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Daniel Jon Merenstein treated 217 Medicare patients in 2024, average age 76
CMS counts 217 Medicare patients who saw Dr. Merenstein in 2024. The largest group is 65 to 74, with 88 patients. 75% of them have high cholesterol, and 66% have high blood pressure. 6% are also on Medicaid. Their average risk score is 1.14, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Merenstein's median patient age at 54, with 58% women.
Dr. Merenstein's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Merenstein's Medicare patients by sex, 2024
- Women13261%
- Men8539%
Chronic conditions among Dr. Merenstein's Medicare patients, 2024
- High cholesterol75%
- High blood pressure66%
- Arthritis60%
- Ischemic heart disease28%
- Chronic kidney disease24%
- Mood disorders23%
- Anxiety21%
- Atrial fibrillation21%
Share of Medicare patients with each condition. A patient can have several.
Dr. Merenstein's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 54
Patient panel by sex, all payers
- Women58%
- Men40%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Daniel Jon Merenstein wrote 140 Medicare Part D claims in 2024
In 2024, Dr. Merenstein wrote 140 Medicare Part D claims for 115 patients. 79% of them were for generic drugs. CMS names the drug for 15 of them, across 1 drug with 11 or more claims each, at $1,429 in total drug cost.
Dr. Merenstein's Part D claims by kind of drug, 2024
- Generic110 claims79%
- Brand-name and other30 claims21%
Dr. Merenstein'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. Merenstein's Part D claims, 2024
- Antibiotics35%49 of 140 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
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. Daniel Jon Merenstein scored 94 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 94 out of 100 for Dr. Merenstein for performance year 2024, reported through an alternative payment model (APM). Dr. Merenstein accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Merenstein as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Dr. Merenstein's MIPS scores, performance year 2024
- 94of 100Final score
- 88of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Daniel Jon Merenstein has 115 publications on record
Dmand AI links 115 papers to Dr. Merenstein, published from 2010 to 2025. 2024 was the busiest year, with 10. The most frequent topics are HIV Infections, Probiotics and Anti-Bacterial Agents. Dr. Merenstein has published most often in J Acquir Immune Defic Syndr. Dr. Merenstein's most frequent co-authors are Mardge Hillary Cohen, MD, Phyllis Tien and Kathleen M. Weber, MD.
Dr. Merenstein's papers by year, 2016 to 2025
Topics Dr. Merenstein writes about most
- HIV Infections
- Probiotics
- Anti-Bacterial Agents
- Anti-HIV Agents
- Depression
- Food Supply
- Gastrointestinal Microbiome
- Viral Load
Dr. Merenstein's most frequent co-authors
- Mardge Hillary Cohen, MD35 shared papers
- Phyllis Tien28 shared papers
- Kathleen M. Weber, MD16 shared papers
Recent publications by Dr. Merenstein
See who Dr. Merenstein researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Merenstein works with, so you can find a warm path to the right family medicine physicians.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Daniel Jon Merenstein has worked on 2 clinical trials
Dmand AI links Dr. Merenstein to 2 clinical trials, 2 of them early phase 1 studies. Georgetown University sponsors the most, 2.
Recent clinical trials with Dr. Merenstein
Exploratory Pilot Studies to Demonstrate Mechanisms of Preventing Antibiotic-Associated Diarrhea and the Role for Probiotics (opens in a new tab)
Exploratory Pilot Studies to Demonstrate Mechanisms of Preventing Antibiotic-Associated Diarrhea and the Role for Probiotics (opens in a new tab)
Sources: Dmand AI Research Linkage; and ClinicalTrials.gov (National Library of Medicine)
Dr. Daniel Jon Merenstein received $3,041 in industry payments in 2017
CMS Open Payments shows 1 general payment to Dr. Merenstein from 1 drug or device company in 2017. Consulting fees make up the largest share, 100% of the total. Bayer HealthCare Pharmaceuticals Inc. paid the most, $3,041.
Companies that paid Dr. Merenstein the most, 2017 to 2017
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Daniel Jon Merenstein graduated from Jefferson Medical College of Thomas Jefferson University
Dr. Merenstein graduated from Jefferson Medical College of Thomas Jefferson University in 1997.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Daniel Jon Merenstein'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)Clinician Public Reporting: Overall MIPS Performance (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 |
| Clinical trials and co-investigators | Dmand AI Research LinkageClinicalTrials.gov (National Library of Medicine) (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. Daniel Jon Merenstein
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. Daniel Jon Merenstein's NPI number?
Dr. Daniel Jon Merenstein's NPI number is 1780748822. It was assigned on December 21, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Daniel Jon Merenstein?
Dr. Daniel Jon Merenstein is a family medicine physician in Fairfax, Virginia. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).
Where does Dr. Daniel Jon Merenstein practice?
Dr. Merenstein practices at 3650 Joseph Siewick Dr, Fairfax, VA 22033. Dr. Merenstein's primary practice is Inova Physician Partners in Fairfax, Virginia. Dmand AI also links Dr. Merenstein to 3 medical groups and 2 group practices and clinics.
What is Dr. Daniel Jon Merenstein's office phone number?
The practice phone on file for Dr. Merenstein is (703) 321-2609.
What is Dr. Daniel Jon Merenstein's medical license number?
Dr. Merenstein holds Virginia license 0101058211, one of the licenses on file in 2 states.
Which states has Dr. Daniel Jon Merenstein been licensed in?
Dmand AI has state licenses on file for Dr. Merenstein in Virginia and District of Columbia.
What medical group is Dr. Daniel Jon Merenstein part of?
Dr. Merenstein is linked to Inova Urgent Care Center. Dmand AI links Dr. Merenstein to 3 more medical groups.
Does Dr. Daniel Jon Merenstein accept Medicare?
Yes. CMS data shows Dr. Merenstein billed Medicare for 293 services in 2024, and Dr. Merenstein accepts Medicare assignment.
Does Dr. Daniel Jon Merenstein offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Merenstein as offering telehealth services.
What is Dr. Daniel Jon Merenstein's MIPS score?
Dr. Merenstein's MIPS final score for performance year 2024 is 94 out of 100, reported through an alternative payment model (APM).
Show 8 more questionsShow fewer questions
How many Medicare patients does Dr. Daniel Jon Merenstein see?
CMS counts 217 Medicare patients who saw Dr. Merenstein in 2024, with an average age of 76.
What services does Dr. Daniel Jon Merenstein bill to Medicare?
In 2024, Dr. Merenstein's most billed Medicare services were office visit, established patient (99214), office visit, established patient (99213) and lab and pathology test (87428).
Where did Dr. Daniel Jon Merenstein go to medical school?
Dr. Merenstein graduated from Jefferson Medical College of Thomas Jefferson University in 1997.
What drugs does Dr. Daniel Jon Merenstein prescribe most?
In 2024 Medicare Part D data, Dr. Merenstein's most prescribed drugs by claims were Paxlovid.
Has Dr. Daniel Jon Merenstein received payments from drug or device companies?
CMS Open Payments shows $3,041 in general payments to Dr. Merenstein from 1 company from 2017 to 2017. The largest total came from Bayer HealthCare Pharmaceuticals Inc.
How long has Dr. Daniel Jon Merenstein been practicing?
Dr. Merenstein graduated from medical school in 1997, 29 years ago.
Does Dr. Daniel Jon Merenstein do research?
Dmand AI links 115 publications to Dr. Merenstein, published from 2010 to 2025. Dr. Merenstein has worked on 2 clinical trials.
Who does Dr. Daniel Jon Merenstein publish with?
Dr. Merenstein's most frequent co-authors are Mardge Hillary Cohen, MD (35 shared papers), Phyllis Tien (28 shared papers) and Kathleen M. Weber, MD (16 shared papers).
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