Hwang Junn, M.D.
NPI 1659539195 · General Practice Physician · Annandale, VA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Hwang Junn, M.D. is a General Practice Physician provider in Annandale, VA (NPI 1659539195).
Provider details
- NPI number
- 1659539195
- Entity type
- Individual
- Primary specialty
- General Practice PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- A 103692 (CA)
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
18 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
3,382 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 835 | $150 |
| Therapy Procedure Using Exercise to Develop Strength, Endurance, Range of Motion, and Flexibility, Each 15 Minutes97110 | 585 | $34 |
| Chronic Care Management Services, First 20 Minutes of Clinical Staff Time Directed By Health Care Professional, Per Calendar Month99490 | 333 | $73 |
| Blood Glucose (sugar) Test Performed By Hand-Held Instrument82962 | 292 | $3 |
| Advance Care Planning, First 30 Minutes99497 | 177 | $94 |
| Administration and Interpretation of Patient-Focused Health Risk Assessment96160 | 122 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 79 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 463 | 137 |
| Losartan Potassium | 282 | 84 |
| Amlodipine Besylate | 264 | 73 |
| Rosuvastatin Calcium | 253 | 85 |
| Fluticasone Propionate | 243 | 89 |
| Montelukast Sodium | 219 | 86 |
| Alendronate Sodium | 215 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$86 across 4 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
- 2008-05-31
- Last updated
- 2015-04-08
Frequently asked questions
- What is Hwang Junn's NPI number?
- Hwang Junn's National Provider Identifier (NPI) is 1659539195, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Hwang Junn's specialty?
- Hwang Junn is listed in the NPPES registry with a primary specialty of General Practice Physician (Allopathic & Osteopathic Physicians).
- Where is Hwang Junn located?
- Hwang Junn's practice location on file with NPPES is 4216 Evergreen Ln, Annandale, VA 22003-3243.
- What is Hwang Junn's phone number?
- The practice phone number listed in the NPPES registry for Hwang Junn is (703) 468-4462.
- Does Hwang Junn accept Medicare?
- Hwang Junn is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Hwang Junn's NPI active?
- Yes — Hwang Junn's NPI (1659539195) is active in the NPPES registry as of the last update on 2015-04-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.