Kathy Tieu, M.D.
NPI 1811973951 · Dermatology Physician · Fairfax, VA
Enrolled with Medicare as Practitioner - Dermatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Kathy Tieu, M.D. is a Dermatology Physician provider in Fairfax, VA (NPI 1811973951).
Provider details
- NPI number
- 1811973951
- Entity type
- Individual
- Primary specialty
- Dermatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 0101235150 (VA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
4,557 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Destruction of Precancer Skin Growth, 2-14 Growths17003 | 1,736 | $8 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 831 | $149 |
| Destruction of Precancer Skin Growth, 1 Growth17000 | 483 | $57 |
| Destruction of Skin Growth, 1-14 Growths17110 | 328 | $128 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 239 | $106 |
| Biopsy of Related Skin Growth, First Growth |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 19 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Clobetasol Propionate | 140 | 76 |
| Ketoconazole | 106 | 53 |
| Doxycycline Hyclate | 97 | 24 |
| Doxycycline Monohydratebrand: Doxycycline Ir-Dr | 51 | — |
| Triamcinolone Acetonide | 48 | 30 |
| Minoxidil | 45 | 18 |
| Gabapentin | 37 | — |
| Metronidazole |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$219 across 6 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-12-20
- Last updated
- 2016-02-15
Frequently asked questions
- What is Kathy Tieu's NPI number?
- Kathy Tieu's National Provider Identifier (NPI) is 1811973951, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Kathy Tieu's specialty?
- Kathy Tieu is listed in the NPPES registry with a primary specialty of Dermatology Physician (Allopathic & Osteopathic Physicians).
- Where is Kathy Tieu located?
- Kathy Tieu's practice location on file with NPPES is 3700 Joseph Siewick Dr, Fairfax, VA 22033-1744.
- What is Kathy Tieu's phone number?
- The practice phone number listed in the NPPES registry for Kathy Tieu is (703) 620-8900.
- Does Kathy Tieu accept Medicare?
- Kathy Tieu is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Kathy Tieu's NPI active?
- Yes — Kathy Tieu's NPI (1811973951) is active in the NPPES registry as of the last update on 2016-02-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.