William Grace, M.D.
NPI 1578565610 · Specialist · New York, NY
Enrolled with Medicare as Practitioner - Medical Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Grace, M.D. is a Specialist provider in New York, NY (NPI 1578565610).
Provider details
- NPI number
- 1578565610
- Entity type
- Individual
- Primary specialty
- SpecialistOther Service Providers
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 108472 (NY)
Specialties & taxonomies
Other Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
21 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
7,144 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) |
|---|---|---|
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 895 | $9 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 855 | $8 |
| Flow Cytometry Technique for Dna Or Cell Analysis, Each Additional Marker88185 | 529 | $28 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 434 | $10 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 427 | $146 |
| Phosphate Level84100 | 337 | $5 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 31 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Letrozole | 69 | 19 |
| Fosnetupitant/Palonosetronbrand: Akynzeo | 61 | 21 |
| Enzalutamidebrand: Xtandi | 59 | — |
| Palbociclibbrand: Ibrance | 57 | — |
| Darbepoetin Alfa in Polysorbatbrand: Aranesp | 56 | 21 |
| Tamoxifen Citrate | 49 | 22 |
| Apixabanbrand: Eliquis | 49 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-06-01
- Last updated
- 2017-04-25
Frequently asked questions
- What is William Grace's NPI number?
- William Grace's National Provider Identifier (NPI) is 1578565610, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Grace's specialty?
- William Grace is listed in the NPPES registry with a primary specialty of Specialist (Other Service Providers).
- Where is William Grace located?
- William Grace's practice location on file with NPPES is 945 Fifth Avenue, New York, NY 10021-2661.
- What is William Grace's phone number?
- The practice phone number listed in the NPPES registry for William Grace is (212) 675-6826.
- Does William Grace accept Medicare?
- William Grace is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Grace's NPI active?
- Yes — William Grace's NPI (1578565610) is active in the NPPES registry as of the last update on 2017-04-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.