What is Ilsa Grunder's specialty?

Ilsa Grunder (NPI 1073653507) is a Medicare-billing provider whose primary specialty is Nurse Practitioner in Worcester, MA.

Where does Ilsa Grunder practice?

Ilsa Grunder practices in Worcester, MA, based on the location reported in the CMS Medicare provider datasets for NPI 1073653507.

How much does Medicare pay Ilsa Grunder?

Ilsa Grunder (NPI 1073653507) received approximately $1.3M in total Medicare Part B payments, serving 431 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1073653507

Ilsa GrunderNP

Nurse PractitionerWorcester, MAI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

1,077

Unique beneficiaries

—

Total services

42,534

Distinct HCPCS

Medicare payment

$303K

Peer benchmark

Total Medicare services vs. 5,906 Nurse Practitioner providers in MA — top quintile (cohort median 289).

PRESCRIBING · PART D · 2024

Total Rx claims

181

Beneficiaries

—

Total drug cost

$292K

Distinct drugs

Brand share

40.9%

Top prescribed drugs

Apixaban62 claims

Hydroxyurea40 claims

Prednisone21 claims

Letrozole18 claims

Levothyroxine Sodium17 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

Total received

$81

Payment records

By payment type

Food and Beverage$81

Top paying entities

Food and Beverage$81

FACILITY AFFILIATIONS

Hospital & Facility Affiliations (1)

CCN 220176

Hospital

REFERRAL NETWORK

Where Ilsa Grunder's patients come from & go

Directional shared-patient flow from Medicare claims — who sends patients to this provider (inbound) and where this provider's patients go next (outbound). 6 inbound referrers · 5 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Quest Diagnostics Massachusetts Llc Clinical Laboratory · Marlborough, MA	126	577
James Rooney Hematology-Oncology · Worcester, MA	33	149
QUEST DIAGNOSTICS MASSACHUSETTS LLC	16	31
UMASS MEMORIAL HEALTHALLIANCE CLINTON HOSPITAL INC	11	14
Saleem Khanani Hematology-Oncology · Worcester, MA	11	59
Amr Hassan Internal Medicine · Klamath Falls, OR	11	29

Refers patients to

Outbound — where patients go next

Physician	Patients	Visits
Quest Diagnostics Massachusetts Llc Clinical Laboratory · Marlborough, MA	143	716
VHS ACQUISITION SUBSIDIARY NUMBER 7 INC	52	378
James Rooney Hematology-Oncology · Worcester, MA	37	160
QUEST DIAGNOSTICS MASSACHUSETTS LLC	20	44
UMASS MEMORIAL MEDICAL CENTER, INC.	20	44

Source: CMS Physician Shared Patient Patterns (30-day window, Medicare FFS). Direction = a beneficiary seen by the first provider, then the second, within 30 days; a proxy for referral, not a documented referral. Pairs with fewer than 11 shared beneficiaries are suppressed.

CROSS-REFERENCE

Related data on other Healthparse brands

ProviderScore

OIG/SAM exclusion screening, sanctions history

Healthparse Signals

Monitor this provider for changes — dated NPI change events