Christina Grassi
NPI 1649452889 · Specialist · Mount Sinai, NY
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Christina Grassi is a Specialist provider in Mount Sinai, NY (NPI 1649452889).
Provider details
- NPI number
- 1649452889
- Entity type
- Individual
- Primary specialty
- SpecialistOther Service Providers
- Sex
- Female
- Sole proprietor
- No
- License
- 304655 (NY)
Specialties & taxonomies
Other Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
18 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 29 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Sevelamer Carbonate | 100 | 30 |
| Sucroferric Oxyhydroxidebrand: Velphoro | 58 | 15 |
| Fat Emulsion/Olive/Soy/Phosphobrand: Clinolipid | 44 | — |
| Nifedipinebrand: Nifedipine Er | 40 | 13 |
| Alprazolam | 37 | — |
| Ropinirole Hcl | 30 | — |
| Apixabanbrand: Eliquis | 30 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$125 across 1 record (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
- 2007-11-29
- Last updated
- 2007-11-29
Frequently asked questions
- What is Christina Grassi's NPI number?
- Christina Grassi's National Provider Identifier (NPI) is 1649452889, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Christina Grassi's specialty?
- Christina Grassi is listed in the NPPES registry with a primary specialty of Specialist (Other Service Providers).
- Where is Christina Grassi located?
- Christina Grassi's practice location on file with NPPES is 701 Route 25a, Mount Sinai, NY 11766-2050.
- What is Christina Grassi's phone number?
- The practice phone number listed in the NPPES registry for Christina Grassi is (631) 331-4403.
- Does Christina Grassi accept Medicare?
- Christina Grassi is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Christina Grassi's NPI active?
- Yes — Christina Grassi's NPI (1649452889) is active in the NPPES registry as of the last update on 2007-11-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.