Long Huynh-Duc, D.O.
NPI 1447572169 · Rheumatology Physician · Greenville, SC
Enrolled with Medicare as Practitioner - Rheumatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Long Huynh-Duc, D.O. is a Rheumatology Physician provider in Greenville, SC (NPI 1447572169).
Provider details
- NPI number
- 1447572169
- Entity type
- Individual
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- No
- License
- 37758 (SC)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
16 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
4,773 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) |
|---|---|---|
| Administration of Non-Hormonal Anti-Neoplastic Chemotherapy Under Skin Or Into Muscle96401 | 1,069 | $64 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 938 | $8 |
| Administration of Chemotherapy Into Vein, 1 Hour Or Less96413 | 850 | $115 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 731 | $118 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 290 | $15 |
| Administration of Chemotherapy Into Vein, Each Additional Hour |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 45 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisone | 722 | 211 |
| Hydroxychloroquine Sulfate | 717 | 219 |
| Methotrexate Sodiumbrand: Methotrexate | 512 | 172 |
| Tramadol Hcl | 247 | 81 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 174 | 66 |
| Diclofenac Sodium | 173 | 56 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$6,310 across 189 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
- 2010-02-22
- Last updated
- 2024-01-11
- Certified
- 2024-01-11
Frequently asked questions
- What is Long Huynh-Duc's NPI number?
- Long Huynh-Duc's National Provider Identifier (NPI) is 1447572169, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Long Huynh-Duc's specialty?
- Long Huynh-Duc is listed in the NPPES registry with a primary specialty of Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is Long Huynh-Duc located?
- Long Huynh-Duc's practice location on file with NPPES is 3 Saint Francis Dr, Greenville, SC 29601-3971.
- What is Long Huynh-Duc's phone number?
- The practice phone number listed in the NPPES registry for Long Huynh-Duc is (864) 235-8396.
- Does Long Huynh-Duc accept Medicare?
- Long Huynh-Duc is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Long Huynh-Duc's NPI active?
- Yes — Long Huynh-Duc's NPI (1447572169) is active in the NPPES registry as of the last update on 2024-01-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.