Phat Nguyen, D.O.
NPI 1881636777 · Internal Medicine Physician · Manchester, NH
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Phat Nguyen, D.O. is a Internal Medicine Physician provider in Manchester, NH (NPI 1881636777).
Provider details
- NPI number
- 1881636777
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- No
- License
- 10829 (NH)
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
20 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
340 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 | 237 | $94 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 54 | $140 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 49 | $65 |
Typical Medicare-allowed amounts for these services range $65–$140 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 78 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 566 | 180 |
| Lisinopril | 386 | 126 |
| Losartan Potassium | 338 | 108 |
| Amlodipine Besylate | 307 | 99 |
| Metformin Hclbrand: Metformin Hcl Er | 219 | 66 |
| Levothyroxine Sodium | 193 | 47 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-06-12
- Last updated
- 2011-07-20
Frequently asked questions
- What is Phat Nguyen's NPI number?
- Phat Nguyen's National Provider Identifier (NPI) is 1881636777, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Phat Nguyen's specialty?
- Phat Nguyen is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Phat Nguyen located?
- Phat Nguyen's practice location on file with NPPES is 100 Hitchcock Way, Manchester, NH 03104-4125.
- What is Phat Nguyen's phone number?
- The practice phone number listed in the NPPES registry for Phat Nguyen is (603) 695-2500.
- Does Phat Nguyen accept Medicare?
- Phat Nguyen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Phat Nguyen's NPI active?
- Yes — Phat Nguyen's NPI (1881636777) is active in the NPPES registry as of the last update on 2011-07-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.