Marisa Nguyen, M.D.
NPI 1639269723 · Internal Medicine Physician · Aiea, HI
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marisa Nguyen, M.D. is a Internal Medicine Physician provider in Aiea, HI (NPI 1639269723).
Provider details
- NPI number
- 1639269723
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- MD-11655 (HI)
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
19 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
1,074 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) |
|---|---|---|
| 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 | 366 | $16 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 263 | $82 |
| Telephone Medical Discussion With Physician, 5-10 Minutes99441 | 170 | $35 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 122 | $107 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 107 | $72 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 74 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 645 | 216 |
| Losartan Potassium | 426 | 140 |
| Amlodipine Besylate | 312 | 108 |
| Hydrochlorothiazide | 232 | 77 |
| Levothyroxine Sodium | 185 | 56 |
| Metoprolol Succinate | 158 | 59 |
| Metformin Hcl |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-10-13
- Last updated
- 2012-03-19
Frequently asked questions
- What is Marisa Nguyen's NPI number?
- Marisa Nguyen's National Provider Identifier (NPI) is 1639269723, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marisa Nguyen's specialty?
- Marisa Nguyen is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Marisa Nguyen located?
- Marisa Nguyen's practice location on file with NPPES is 98-151 Pali Momi St, Aiea, HI 96701-4300.
- What is Marisa Nguyen's phone number?
- The practice phone number listed in the NPPES registry for Marisa Nguyen is (808) 483-6400.
- Does Marisa Nguyen accept Medicare?
- Marisa Nguyen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marisa Nguyen's NPI active?
- Yes — Marisa Nguyen's NPI (1639269723) is active in the NPPES registry as of the last update on 2012-03-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.