Dianna Phan, M.D.
NPI 1598055444 · Family Medicine Physician · Marrero, LA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Dianna Phan, M.D. is a Family Medicine Physician provider in Marrero, LA (NPI 1598055444).
Provider details
- NPI number
- 1598055444
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
15 yrs in NPPES registry
- Profile completeness25% of score
83% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
357 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) |
|---|---|---|
| Chronic Care Management Services, First 20 Minutes of Clinical Staff Time Directed By Health Care Professional, Per Calendar Month99490 | 110 | $48 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 72 | $94 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 66 | $94 |
| Removal of Skin and Tissue, 20.0 Sq Cm Or Less11042 | 51 | $59 |
| 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 | 32 | $16 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 121 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 553 | 187 |
| Amlodipine Besylate | 525 | 172 |
| Levothyroxine Sodium | 266 | 86 |
| Hydrochlorothiazide | 244 | 88 |
| Omeprazole | 180 | 58 |
| Pantoprazole Sodium | 176 | 61 |
| Losartan Potassium |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$133 across 5 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
- 2011-04-12
- Last updated
- 2014-08-05
Frequently asked questions
- What is Dianna Phan's NPI number?
- Dianna Phan's National Provider Identifier (NPI) is 1598055444, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Dianna Phan's specialty?
- Dianna Phan is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Dianna Phan located?
- Dianna Phan's practice location on file with NPPES is 4225 Lapalco Blvd, Marrero, LA 70072-4338.
- What is Dianna Phan's phone number?
- The practice phone number listed in the NPPES registry for Dianna Phan is (504) 371-9355.
- Does Dianna Phan accept Medicare?
- Dianna Phan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Dianna Phan's NPI active?
- Yes — Dianna Phan's NPI (1598055444) is active in the NPPES registry as of the last update on 2014-08-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.