Dr. Stephen H. Flax, MD
- Medicare services, 2024
- 3,572
- Medicare patients, 2024
- 915
- Part D claims, 2024
- 902
- MIPS score, 2024
- 80
- Hospital affiliations
- 1
- Practice address
- 44121 Leesburg Pike, Ashburn, VA 20147
- Practice phone
- Call (703) 726-0070
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Premier Dermatology
Ashburn, Virginia
Find Dr. Flax's professional email, personal email and mobile number
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Dr. Stephen H. Flax is a dermatologist in Ashburn, Virginia
Dr. Flax practices at Premier Dermatology in Ashburn, Virginia.
Dr. Flax's NPI, 1376514596, was assigned on January 27, 2006. Dr. Flax graduated from Albert Einstein College of Medicine of Yeshiva University in 1985. Dr. Flax holds Virginia license 0101056865.
- NPI
- 1376514596NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2365566056
- NPI enumeration date
- January 27, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (703) 726-0070
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 67
- Medical school graduation
- 1985
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Stephen H. Flax practices at Premier Dermatology in Ashburn, Virginia
Dr. Flax's primary practice is Premier Dermatology, at 44121 Leesburg Pike, Ashburn, VA 20147 in Loudoun County. The practice phone is (703) 726-0070.
- Premier Dermatology44121 Leesburg Pike, Ashburn, VA 20147 · Loudoun CountyPhone(703) 726-0070
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Stephen H. Flax is affiliated with 3 sites of care and 1 medical group
Dr. Flax's primary practice is Premier Dermatology in Ashburn, Virginia. Dr. Flax is also affiliated with Winchester Medical Center. The medical group on file is Premier Dermatology. Dmand AI also links Dr. Flax to 1 more group practice or clinic, 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. Stephen H. Flax's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Flax practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Premier Dermatology | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Stephen H. Flax is one of 338 dermatologists in Virginia
Dermatology is Dr. Flax's primary specialty in the NPI Registry, under taxonomy code 207N00000X. Dr. Flax is licensed in Virginia.
Specialties and state licenses
- Dermatology, VirginiaPrimary
Dermatologists near Dr. Flax
Counts of dermatologists 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. Stephen H. Flax billed Medicare for 3,572 services in 2024
CMS data shows 3,572 Medicare services from Dr. Flax across 25 procedure codes in 2024, for 915 Medicare patients. Medicare paid $181,203 for them. Every service was in an office.
Dr. Flax's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Surgery
- 2023: 2,3542024: 2,1708%
- Office and hospital visits
- 2023: 1,2562024: 1,2903%
- Drugs given in the office
- 2023: 292024: 79172%
- Tests and treatments
- 2023: 292024: 2224%
- Other services
- 2023: 142024: 1121%
Dr. Flax compared with the Virginia median for dermatologists, 2024
- Dr. Flax
- Virginia median
- Medicare services
- 3,572vs 2,67134% above
- Medicare patients
- 915vs 67835% above
- Part D claims
- 803vs 3432.3 times
Medians across 337 dermatologists in Virginia with Dmand AI profiles that report each measure.
Dr. Flax'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. Flax and other dermatologists in Virginia.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Stephen H. Flax treated 915 Medicare patients in 2024, average age 75
CMS counts 915 Medicare patients who saw Dr. Flax in 2024. The largest group is 65 to 74, with 430 patients. 75% of them have high cholesterol, and 72% have high blood pressure. 2% are also on Medicaid. Their average risk score is 1.05, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Flax's median patient age at 68, with 43% women.
Dr. Flax's Medicare patients by age, 2024
Dr. Flax's Medicare patients by sex, 2024
- Women41445%
- Men50155%
Chronic conditions among Dr. Flax's Medicare patients, 2024
- High cholesterol75%
- High blood pressure72%
- Arthritis43%
- Diabetes27%
- Chronic kidney disease24%
- Ischemic heart disease24%
- Anxiety20%
- Atrial fibrillation20%
Share of Medicare patients with each condition. A patient can have several.
Dr. Flax's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 68
Patient panel by sex, all payers
- Women43%
- Men56%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Stephen H. Flax wrote 902 Medicare Part D claims in 2024
In 2024, Dr. Flax wrote 902 Medicare Part D claims for 365 patients. 96% of them were for generic drugs. CMS names the drug for 803 of them, across 17 drugs with 11 or more claims each, at $16,365 in total drug cost. In 2023, CMS named 604 claims across 15 drugs.
Dr. Flax's Part D claims by kind of drug, 2024
- Generic866 claims96%
- Brand-name36 claims4%
Dr. Flax'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. Flax's Part D claims, 2024
- Antibiotics18%163 of 902 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: 6042024: 80333%
Drugs named by CMS: 17 in 2024, 15 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. Stephen H. Flax scored 80 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 80 out of 100 for Dr. Flax for performance year 2024, reported as part of a group. Dr. Flax accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 129 procedures of melanoma (skin cancer) excision by Dr. Flax, more than 95% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Dr. Flax's MIPS scores, performance year 2024
- 80of 100Final score
- 58.3of 100Quality
- 40of 100Improvement Activities
- 89of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Where Dr. Flax ranks in Medicare procedure volume
- Removal of skin lesions
- 92nd percentile874 procedures
- Skin biopsy
- 89th percentile263 procedures
- Melanoma (skin cancer) excision
- 95th percentile129 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)
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Dr. Stephen H. Flax received $6,266 in industry payments from 2016 to 2025
CMS Open Payments shows 96 general payments to Dr. Flax from 21 drug and device companies from 2016 to 2025. Consulting fees make up the largest share, 48% of the total. Janssen Pharmaceuticals, Inc paid the most, $3,819.
General payments to Dr. Flax by program year, 2016 to 2025
General payments to Dr. Flax by kind, 2016 to 2025
- Consulting fees$3,00048%
- Food and beverage$2,86646%
- Travel and lodging$3886%
- Education$120%
Companies that paid Dr. Flax 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. Stephen H. Flax graduated from Albert Einstein College of Medicine of Yeshiva University
Dr. Flax graduated from Albert Einstein College of Medicine of Yeshiva University in 1985.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Stephen H. Flax'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)Doctors and Clinicians Utilization Data (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. Stephen H. Flax
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. Stephen H. Flax's NPI number?
Dr. Stephen H. Flax's NPI number is 1376514596. It was assigned on January 27, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Stephen H. Flax?
Dr. Stephen H. Flax is a dermatologist in Ashburn, Virginia. The primary specialty in the NPI Registry is Dermatology Physician (taxonomy code 207N00000X).
Where does Dr. Stephen H. Flax practice?
Dr. Flax practices at 44121 Leesburg Pike, Ashburn, VA 20147. Dr. Flax's primary practice is Premier Dermatology in Ashburn, Virginia. Dmand AI also links Dr. Flax to 1 group practice or clinic.
What is Dr. Stephen H. Flax's office phone number?
The practice phone on file for Dr. Flax is (703) 726-0070.
What is Dr. Stephen H. Flax's medical license number?
Dr. Flax holds Virginia license 0101056865.
Which hospitals is Dr. Stephen H. Flax affiliated with?
Dr. Flax is affiliated with Winchester Medical Center.
What medical group is Dr. Stephen H. Flax part of?
Dr. Flax is linked to Premier Dermatology.
Does Dr. Stephen H. Flax accept Medicare?
Yes. CMS data shows Dr. Flax billed Medicare for 3,572 services in 2024, and Dr. Flax accepts Medicare assignment.
What is Dr. Stephen H. Flax's MIPS score?
Dr. Flax's MIPS final score for performance year 2024 is 80 out of 100, reported as part of a group.
How many Medicare patients does Dr. Stephen H. Flax see?
CMS counts 915 Medicare patients who saw Dr. Flax in 2024, with an average age of 75.
Show 5 more questionsShow fewer questions
What services does Dr. Stephen H. Flax bill to Medicare?
In 2024, Dr. Flax's most billed Medicare services were surgery: skin and soft tissue (17003), office visit, established patient (99213) and surgery: skin and soft tissue (17000).
Where did Dr. Stephen H. Flax go to medical school?
Dr. Flax graduated from Albert Einstein College of Medicine of Yeshiva University in 1985.
What drugs does Dr. Stephen H. Flax prescribe most?
In 2024 Medicare Part D data, Dr. Flax's most prescribed drugs by claims were Triamcinolone Acetonide, Cephalexin and Methotrexate.
Has Dr. Stephen H. Flax received payments from drug or device companies?
CMS Open Payments shows $6,266 in general payments to Dr. Flax from 21 companies from 2016 to 2025. The largest total came from Janssen Pharmaceuticals, Inc.
How long has Dr. Stephen H. Flax been practicing?
Dr. Flax graduated from medical school in 1985, 41 years ago.
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