Kathleen Langan, M.D.
NPI 1538455001 · Family Medicine Physician · Fairfax, VA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Kathleen Langan, M.D. is a Family Medicine Physician provider in Fairfax, VA (NPI 1538455001).
Provider details
- NPI number
- 1538455001
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- 0116024019 (VA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
15 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
726 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 268 | $141 |
| Chronic Care Management Services, First 20 Minutes of Clinical Staff Time Directed By Health Care Professional, Per Calendar Month99490 | 108 | $69 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 64 | $143 |
| Blood Test, Clotting Time85610 | 61 | $4 |
| Anticoagulant Management of Patient Taking Warfarin93793 | 58 | $12 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 27 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 130 | 36 |
| Hydrochlorothiazide | 52 | 18 |
| Losartan Potassium | 49 | 17 |
| Lisinopril | 41 | — |
| Levothyroxine Sodium | 40 | 12 |
| Metoprolol Succinate | 36 | — |
| Amlodipine Besylate |
Practice location
Mailing address
Registry dates
- Enumerated
- 2011-06-23
- Last updated
- 2023-11-27
- Certified
- 2020-10-16
Frequently asked questions
- What is Kathleen Langan's NPI number?
- Kathleen Langan's National Provider Identifier (NPI) is 1538455001, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Kathleen Langan's specialty?
- Kathleen Langan is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Kathleen Langan located?
- Kathleen Langan's practice location on file with NPPES is 3650 Joseph Siewick Dr Ste 400, Fairfax, VA 22033-1715.
- What is Kathleen Langan's phone number?
- The practice phone number listed in the NPPES registry for Kathleen Langan is (703) 391-2020.
- Does Kathleen Langan accept Medicare?
- Kathleen Langan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Kathleen Langan's NPI active?
- Yes — Kathleen Langan's NPI (1538455001) is active in the NPPES registry as of the last update on 2023-11-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.