Dr. Diane Deng Flexsenhar , DDS
Dentist - General Practice • Reston, VA
11711 Bowman Green Dr
Reston, VA 201903501
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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Dr. Diane Flexsenhar is listed in NPPES under Dentist - General Practice.
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NPI assigned on June 18, 2009; this date does not establish years in practice.
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Published CMS data list 12 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Amoxicillin — 12 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See the full table · Guide: How to read Medicare Part D prescriber data
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Fewer Part D prescriptions than 85% of clinicians listed under Dentist - General Practice in Reston, VA (2024, 16 clinicians with data). Median for this group: 22. Middle half: 16 to 49.
Fewer Part D prescriptions than 90% of clinicians listed under Dentist - General Practice in Virginia (2024, 1,433 clinicians with data). Median for this group: 36. Middle half: 19 to 73.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part D prescriptions went from 34 in 2018 to 12 in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2018–2024.
Practice Location & Contact Primary Location
11711 Bowman Green Dr
Reston, VA 201903501
NPPES lists 1 additional practice-address record in Culpeper, VA. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
What Public CMS Data Show
Dentist - General Practice: NPPES taxonomy is a reported classification, not proof of board certification.
30-day fills
12 standardized 30-day fills in 2024
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$51 in 2024
The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024.
Open Payments general payments, program year 2025
All general payments: $135.75 across 3 records.
By nature of payment
- Food and Beverage: $85.75 across 2 records.
- Honoraria: $50.00 across 1 record.
Reporting-company totals
- ZIMVIE INC.: $85.75 across 2 records.
- Benco Dental Supply Co.: $50.00 across 1 record.
A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.
Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).
NPI first issued
2009
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Medicare assignment not listed
CMS data do not show whether this clinician accepts Medicare assignment. This does not mean they do not accept Medicare. Ask the office.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, “Does your provider accept Medicare as full payment?”
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Compared with the same specialty in Reston and Virginia
Billing and prescribing volume is not a quality rating.
Medicare Part D prescriptions
Fewer Part D prescriptions than 85% of clinicians listed under Dentist - General Practice in Reston, VA (2024, 16 clinicians with data). Median for this group: 22. Middle half: 16 to 49.
Fewer Part D prescriptions than 90% of clinicians listed under Dentist - General Practice in Virginia (2024, 1,433 clinicians with data). Median for this group: 36. Middle half: 19 to 73.
Part D drug cost
A lower Part D drug cost than 65% of clinicians listed under Dentist - General Practice in Reston, VA (2024, 16 clinicians with data). Median for this group: $65. Middle half: $49 to $128.
A lower Part D drug cost than 75% of clinicians listed under Dentist - General Practice in Virginia (2024, 1,433 clinicians with data). Median for this group: $110. Middle half: $57 to $259.
43 active clinicians are listed under Dentist - General Practice with a practice address in Reston, VA (3,366 in Virginia).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Reston
0% of these 43 clinicians have the CMS telehealth indicator.
0% of these 43 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part D prescriptions
Medicare Part D prescriptions decreased 65% from 34 in 2018 to 12 in 2024.
- 2018: 34
- 2021: 72
- 2022: 37
- 2023: 21
- 2024: 12
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30-day fills
30-day fills decreased 65% from 34 in 2018 to 12 in 2024.
- 2018: 34
- 2021: 72
- 2022: 37
- 2023: 21
- 2024: 12
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Part D drug cost
Part D drug cost went from $265 in 2018 to $51 in 2024.
- 2018: $265
- 2021: $423
- 2022: $127
- 2023: $109
- 2024: $51
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Industry payments (Open Payments)
Industry payments (Open Payments) decreased 97% from $4,683.47 in 2021 to $135.75 in 2025.
- 2021: $4,683.47
- 2022: $333.92
- 2023: $1,994.98
- 2024: $27.15
- 2025: $135.75
Sources: CMS Medicare Part D Prescribers (2024), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2025 (payments made January 1 – December 31, 2025): fewer than 11 records totaling $135.75.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Benco Dental Supply Co. |
Honoraria
In-kind items and services
|
— | General | $50.00 |
| ZIMVIE INC. |
Food and Beverage
In-kind items and services
|
BELLATEK | General | $42.90 |
| ZIMVIE INC. |
Food and Beverage
In-kind items and services
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BELLATEK | General | $42.85 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Amoxicillin | Amoxicillin | 12 | 86 | $51.33 | 11 |
Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2023-12-20NUCC Taxonomy Code: 1223G0001X
A general dentist is the primary dental care provider for patients of all ages. The general dentist is responsible for the diagnosis, treatment, management and overall coordination of services related to patients' oral health needs.
NUCC Taxonomy Code: 1223G0001X
A general dentist is the primary dental care provider for patients of all ages. The general dentist is responsible for the diagnosis, treatment, management and overall coordination of services related to patients' oral health needs.
Secondary Practice Locations
1400 Sunset Ln
Culpeper, VA 227013300
Phone: 5408259132
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Dentist - General Practice
Doctor of Dental Surgery
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 11711 BOWMAN GREEN DR, RESTON, VA 201903501 (Tel: 7034378337)
Registered at 11711 BOWMAN GREEN DR, RESTON, VA 201903501 (Tel: 5128252966)
NPI status registered as active in NPPES database
Registered at 15004 AVERY RANCH BLVD, A-100, AUSTIN, TX 787174600 (Tel: 5122467645)
Registered at 7605 DELAFIELD LN, AUSTIN, TX 787521312 (Tel: 5128252966)
Recorded as DIANE FLEXSENHAR, D.D.S
Dentist (license number reported to NPPES: TX 24632)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Dentist - General Practices in Reston
- Dr. Gary Hartz, DMD
- Dr. Shane Costa, DDS
- Dr. Francis Dunne, DDS
- Dr. Emilio Canal, DDS
- Dr. Joseph Madison, DMD
- Dr. Robert Hall, DDS
Mailing Address
11711 Bowman Green Dr
Reston, VA 201903501
Phone: 5128252966