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Dr. David Leng, MD
NPI1003074428PAC ID6204126634
- Medicare services, 2021
- 231
- Part D claims, 2024
- 3,170
- Clinical trials
- 10
- Industry payments
- $83
- Affiliated sites
- 1
- Practice address
- 43480 Yukon Dr Suite 100 Suite 100, Ashburn, VA 20147-6988
- Practice phone
- Call (571) 252-6000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Ashburn Medical Center
Multi-specialty group site · Ashburn, Virginia
Find Dr. Leng'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. David Leng is a family medicine physician in Ashburn, Virginia
Dr. Leng practices at Ashburn Medical Center in Ashburn, Virginia.
Dr. Leng's NPI, 1003074428, was assigned on June 2, 2008. Dr. Leng graduated from University of California, Davis School of Medicine in 2008. Dr. Leng holds Virginia license 0101252174.
NPI and contact details
- NPI
- 1003074428NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6204126634
- NPI enumeration date
- June 2, 2008
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (571) 252-6000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 44
- Medical school graduation
- 2008
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. David Leng practices at Ashburn Medical Center in Ashburn, Virginia
Dr. Leng's primary practice is Ashburn Medical Center, at 43480 Yukon Dr Suite 100 Suite 100, Ashburn, VA 20147-6988. The practice phone is (571) 252-6000.
- Ashburn Medical Center43480 Yukon Dr Suite 100 Suite 100, Ashburn, VA 20147-6988Phone(571) 252-6000
Source: Dmand AI Affiliation Data
Dr. David Leng is affiliated with 1 site of care and 1 medical group
Dr. Leng's primary practice is Ashburn Medical Center in Ashburn, Virginia. The medical group on file is Mid-Atlantic Permanente Medical Group.
Ashburn Medical CenterPrimary
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. David Leng's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Leng practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Ashburn Medical Center | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. David Leng is one of 3,459 family medicine physicians in Virginia
Family medicine is Dr. Leng's primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dr. Leng is board certified in family medicine by the American Board of Family Medicine. Dr. Leng is licensed in Virginia.
Specialties and state licenses
- Family medicine, VirginiaPrimary
Family medicine physicians near Dr. Leng
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. David Leng billed Medicare for 231 services in 2021
CMS data shows 231 Medicare services from Dr. Leng across 6 procedure codes in 2021. Medicare paid $8,520 for them. Every service was in an office.
Medicare services, 2021231
Paid by Medicare$8,520
Procedure codes6
Dr. Leng compared with the Virginia median for family medicine physicians, 2021
- Dr. Leng
- Virginia median
- Medicare services
- 231vs 54357% below
- Part D claims
- 2,625vs 7213.6 times
Medians across 3,387 family medicine physicians in Virginia with Dmand AI profiles that report each measure.
Dr. Leng's most billed Medicare procedure codes, 2021
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. Leng and other family medicine physicians in Virginia.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. David Leng's patients have a median age of 43
Across all payers, Dmand AI patient panel data puts Dr. Leng's median patient age at 43, with 37% women.
Dr. Leng's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 43
Patient panel by sex, all payers
- Women37%
- Men61%
Source: Dmand AI Patient Panel Data
Dr. David Leng wrote 3,170 Medicare Part D claims in 2024
In 2024, Dr. Leng wrote 3,170 Medicare Part D claims for 281 patients. 86% of them were for generic drugs. CMS names the drug for 2,625 of them, across 63 drugs with 11 or more claims each, at $88,713 in total drug cost. In 2023, CMS named 2,764 claims across 61 drugs.
Part D claims, 20243,170
Drugs named by CMS63
Total drug cost$88,713
Part D patients281
Dr. Leng's Part D claims by kind of drug, 2024
- Generic2,737 claims86%
- Brand-name379 claims12%
- Other54 claims2%
Dr. Leng'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. Leng's Part D claims, 2024
- Opioids2%73 of 3,170 claims
- Antibiotics1%24 of 3,170 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: 2,7642024: 2,6255%
Drugs named by CMS: 63 in 2024, 61 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. David Leng takes part in Medicare
Dr. Leng 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. David Leng has worked on 10 clinical trials
Dmand AI links Dr. Leng to 10 clinical trials, 4 of them phase 2 studies. 9 are still active or recruiting. Conditions studied include Adenocarcinoma of Lung, Biliary Atresia and Low Back Pain.
Clinical trials with Dr. Leng by phase
- NonePhase 1: no trials
- 4Phase 2: 4 trials
- 1Phase 2/3: 1 trial
- NonePhase 3: no trials
- NonePhase 4: no trials
Trials with no phase (devices, behavioral studies) are left out.
Conditions in Dr. Leng's trials
- Adenocarcinoma of Lung
- Biliary Atresia
- Low Back Pain
- Malocclusion
- Muscular Atrophy
Investigators on the most trials with Dr. Leng
- Kader Tawfiq Abdelerahman, MD10 shared trials
- Randa Abdelmasih, MD10 shared trials
- Marjorie E. Affel, MD10 shared trials
Recent clinical trials with Dr. Leng
Adenocarcinoma of LungAdenocarcinoma
Sources: ClinicalTrials.gov (National Library of Medicine); and Dmand AI Research Linkage
Dr. David Leng received $83 in industry payments from 2016 to 2025
CMS Open Payments shows 5 general payments to Dr. Leng from 5 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. TG Therapeutics, Inc. paid the most, $28.
General payments to Dr. Leng by program year, 2016 to 2025
Companies that paid Dr. Leng 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. David Leng graduated from University of California, Davis School of Medicine
Dr. Leng graduated from University of California, Davis School of Medicine in 2008.
- Medical school
- Board certified in family medicine
Source: Dmand AI Professional Profile Data
Sources for Dr. David Leng'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 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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Clinical trials and co-investigators | ClinicalTrials.gov (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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. David Leng
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. David Leng's NPI number?
Dr. David Leng's NPI number is 1003074428. It was assigned on June 2, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. David Leng?
Dr. David Leng is a family medicine physician in Ashburn, Virginia. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).
Where does Dr. David Leng practice?
Dr. Leng practices at 43480 Yukon Dr Suite 100 Suite 100, Ashburn, VA 20147-6988. Dr. Leng's primary practice is Ashburn Medical Center in Ashburn, Virginia.
What is Dr. David Leng's office phone number?
The practice phone on file for Dr. Leng is (571) 252-6000.
What is Dr. David Leng's medical license number?
Dr. Leng holds Virginia license 0101252174.
What medical group is Dr. David Leng part of?
Dr. Leng is linked to Mid-Atlantic Permanente Medical Group.
Does Dr. David Leng accept Medicare?
Yes. CMS data shows Dr. Leng billed Medicare for 231 services in 2021, and Dr. Leng accepts Medicare assignment.
Is Dr. David Leng board certified?
Yes. Dr. Leng is board certified in family medicine by the American Board of Family Medicine.
What services does Dr. David Leng bill to Medicare?
In 2021, Dr. Leng's most billed Medicare services were medical service (0004A), medical service (0001A) and medical service (0002A).
Where did Dr. David Leng go to medical school?
Dr. Leng graduated from University of California, Davis School of Medicine in 2008.
Show 4 more questionsShow fewer questions
What drugs does Dr. David Leng prescribe most?
In 2024 Medicare Part D data, Dr. Leng's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Lisinopril.
Has Dr. David Leng received payments from drug or device companies?
CMS Open Payments shows $83 in general payments to Dr. Leng from 5 companies from 2016 to 2025. The largest total came from TG Therapeutics, Inc.
How long has Dr. David Leng been practicing?
Dr. Leng graduated from medical school in 2008, 18 years ago.
Does Dr. David Leng do research?
Dr. Leng has worked on 10 clinical trials.
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