Wai Sin, FNP-BC
NPI 1881443364 · Family Nurse Practitioner · Baltimore, MD
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Wai Sin, FNP-BC is a Family Nurse Practitioner provider in Baltimore, MD (NPI 1881443364).
Provider details
- NPI number
- 1881443364
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- FNP-BC
- Sex
- Female
- Sole proprietor
- Yes
- License
- R223917 (MD)
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
2 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
69 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 | 37 | $100 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 21 | $77 |
| Automated Urinalysis Test81003 | 11 | $2 |
Typical Medicare-allowed amounts for these services range $2–$100 (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
Registry dates
- Enumerated
- 2024-05-16
- Last updated
- 2024-05-16
- Certified
- 2024-05-16
Frequently asked questions
- What is Wai Sin's NPI number?
- Wai Sin's National Provider Identifier (NPI) is 1881443364, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Wai Sin's specialty?
- Wai Sin is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Wai Sin located?
- Wai Sin's practice location on file with NPPES is 9101 Franklin Square Dr Ste 300, Baltimore, MD 21237-3966.
- What is Wai Sin's phone number?
- The practice phone number listed in the NPPES registry for Wai Sin is (443) 777-2000.
- Does Wai Sin accept Medicare?
- Wai Sin is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Wai Sin's NPI active?
- Yes — Wai Sin's NPI (1881443364) is active in the NPPES registry as of the last update on 2024-05-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.