Siena Nguyen, MSN, FNP-C, BSN, RN
NPI 1447733498 · Family Nurse Practitioner · Boston, MA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Siena Nguyen, MSN, FNP-C, BSN, RN is a Family Nurse Practitioner provider in Boston, MA (NPI 1447733498).
Provider details
- NPI number
- 1447733498
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- MSN, FNP-C, BSN, RN
- Sex
- Female
- Sole proprietor
- No
- License
- F07181031 (MA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
7 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
137 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 | 86 | $119 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 25 | $9 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 14 | $85 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 12 | $167 |
Typical Medicare-allowed amounts for these services range $9–$167 (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.
Practice location
Mailing address
Additional practice locations (1)
- 20 Bradston StBoston, MA 02118-2705Phone: (617) 635-1000
Registry dates
- Enumerated
- 2018-09-14
- Last updated
- 2023-05-24
- Certified
- 2023-05-24
Frequently asked questions
- What is Siena Nguyen's NPI number?
- Siena Nguyen's National Provider Identifier (NPI) is 1447733498, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Siena Nguyen's specialty?
- Siena Nguyen is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Siena Nguyen located?
- Siena Nguyen's practice location on file with NPPES is 55 Fruit St, Boston, MA 02114-2621.
- What is Siena Nguyen's phone number?
- The practice phone number listed in the NPPES registry for Siena Nguyen is (617) 726-2000.
- Does Siena Nguyen accept Medicare?
- Siena Nguyen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Siena Nguyen's NPI active?
- Yes — Siena Nguyen's NPI (1447733498) is active in the NPPES registry as of the last update on 2023-05-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.