Provider Profile
Ilsa Y. Grunder, NP
Unclaimed ProfileAbout Ilsa Grunder
Ilsa Y. Grunder, NP is a nurse practitioner practicing in Worcester, MA. Medicare claims data shows Ilsa provided 42,445 services to 1,015 patients. The services billed most often include injection, iron sucrose, 1 mg, injection, ferumoxytol, for treatment of iron deficiency anemia, 1 mg (non-esrd use), and injection, immune globulin, (octagam), intravenous, non-lyophilized (e.g., liquid), 500 mg.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it — free, and no identity document with a practice or institutional email.
Education & Training
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (508) 856-3509
- Email not available
Practice Locations
55 LAKE AVE N DEPARTMENT OF HEMATOLOGY ONCOLOGY
Worcester, MA 01655
Procedures Most Often Billed to Medicare
42,445 services · 1,015 patients · 25 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Injection of additional new drug or substance into vein | Treatment | 96375 |
285 | More than most peers in Nurse Practitioner |
| Infusion into a vein for therapy, prevention, or diagnosis, 1 hour or less | Treatment | 96365 |
263 | More than most peers in Nurse Practitioner |
| Administration of chemotherapy into vein, 1 hour or less | Treatment | 96413 |
153 | More often than most peers in Nurse Practitioner |
| Injection of drug or substance under skin or into muscle | Treatment | 96372 |
113 | More often than most peers in Nurse Practitioner |
| Infusion into a vein for therapy, prevention, or diagnosis, each additional hour | Treatment | 96366 |
87 | As often as other peers in Nurse Practitioner |
| Injection of drug or substance into vein | Treatment | 96374 |
55 | More often than most peers in Nurse Practitioner |
| Irrigation of implanted venous access drug delivery device | Treatment | 96523 |
40 | Too few peers to compare |
| Drawing of blood for a medical problem | Treatment | 99195 |
32 | Too few peers to compare |
| Administration of chemotherapy into vein, each additional hour | Treatment | 96415 |
29 | Less often than most peers in Nurse Practitioner |
| Injection, iron sucrose, 1 mg | Drug given | J1756 |
16,000 | Too few peers to compare |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other nurse practitioners at this location 4
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 8
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 27 related providers in 4 groups
Other nurse practitioners in Worcester 4
Same specialty, same city.
Trained at Other 7
Other providers in the same specialty who trained at the same institution.
Class of 2005 at Other 8
Providers who graduated from the same medical school in the same year.
Also performs Injection of additional new drug or substance into vein 8
Providers in MA who bill this service to Medicare most often.
Common questions
What does Ilsa Y. Grunder specialize in?
Ilsa Y. Grunder is a nurse practitioner in Worcester, MA. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where is Ilsa Y. Grunder located?
Ilsa Y. Grunder is listed at 55 Lake Ave N Department of Hematology Oncology, Worcester, MA 01655. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Ilsa Y. Grunder's phone number?
The number on file is (508) 856-3509. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Ilsa Y. Grunder?
Ilsa Y. Grunder's National Provider Identifier is 1073653507. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Ilsa Y. Grunder train?
Ilsa Y. Grunder attended Other, graduating in 2005. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Ilsa Y. Grunder have?
Ilsa Y. Grunder has 21 years experience. Calculated from a graduation year of 2005, reported in the CMS National Downloadable File.
CMS public data
What does Ilsa Y. Grunder do most often?
According to Medicare billing data, Ilsa Y. Grunder provides treatments such as injection of additional new drug or substance into vein and infusion into a vein for therapy, prevention, or diagnosis, 1 hour or less, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Ilsa Y. Grunder's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Ilsa Y. Grunder. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.