2026 NPPES data Nurse Practitioner NPI 1609023985 ANP
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Rosemary Kirousis, ANP

Nurse Practitioner in Worcester, Massachusetts. This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 87,227 in Nurse Practitioner, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.

Federal data, no proprietary rating. We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
426
Medicare Part D claims · 237 beneficiaries · Nurse Practitioner avg: 1K
Generic prescribing
85%
generic claims · 12% brand-name · higher generic rates reduce patient out-of-pocket costs
Compiled from official public sources by the PlainDoctor editorial team.

What the federal data shows

Rosemary Kirousis, ANP filed 426 Medicare Part D claims in 2023 as a Nurse Practitioner in Worcester, Massachusetts, prescribing 85% generic.

426
Part D claims, 2023
85%
generic prescribing

Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.

Rosemary Kirousis, ANP's Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023, across all CMS prescribers nationally

426 Top 38% higher than 62% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). This entry sits in this band. 600–800: 56,224 prescribers (4%). Above this entry. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2K+: 213,991 prescribers (16%). Above this entry. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source CMS Medicare Part D Prescriber Public Use File · 2023

What does the federal data show about Rosemary Kirousis, ANP?

Quality data not reported

NPI registry status

Active

Issued 08/19/2008

NPI 1609023985

Primary specialty

Nurse Practitioner

High-volume

87,227 US NPIs in this specialty

Medicare Part D claims

426 61% vs specialty avg

2023 prescription claims

Specialty avg: 1,084

Specialty distribution in Massachusetts

How Nurse Practitioner compares to other specialties among Massachusetts providers

Massachusetts providers
Mental Health Counselor - 8.3%Mental Health Counselor8.3%Clinical Social Worker - 7.8%Clinical Social Worker7.8%Student in an Organized Health Care Education/Training Program - 6.2%Student in an Organized Health Care Education/Training Program6.2%Behavior Technician - 4.9%Behavior Technician4.9%Counselor - 4.3%Counselor4.3%Internal Medicine Physician - 3.7%Internal Medicine Physician3.7%Nurse Practitioner - 1.5%Nurse Practitioner1.5%
Largest specialties in Massachusetts (% of in-state providers)

Board certification

Not published by CMS

CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Nurse Practitioner. Verify directly:

The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.

Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).

Rosemary Kirousis, ANP appears in the CMS NPPES registry as a Nurse Practitioner provider holding ANP credentials at 366 SHREWSBURY ST APT 3, Worcester, MA, 01604, with a listed phone of (508) 595-2700. NPI 1609023985 was issued on 08/19/2008. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what Kirousis most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 426 prescription claims written by this provider, covering 237 Medicare beneficiaries and totaling roughly $14K in drug spend, split 12% brand-name and 85% generic by claim count. These figures capture only Medicare Part D, commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

Nurse Practitioner is a high-volume specialty nationwide, with 87,227 enrolled providers across 56 states and an average of 1,084 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline. Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.

Practice Address

366 SHREWSBURY ST APT 3
Worcester, MA 01604

Provider Details

NPI 1609023985
Specialty Nurse Practitioner
Credentials ANP
Gender Female
NPI Issued 08/19/2008

Hospital and facility affiliations

Facilities where Rosemary Kirousis, ANP bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.

Reliant Medical Group Inc
Worcester, MA

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

License & disciplinary context - Massachusetts BORIM 2023 annual report

Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~38K Massachusetts medical licensees in 2023 - they are NOT specific to Rosemary Kirousis, ANP. To verify Rosemary Kirousis, ANP's current license status, search the BORIM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

80
Total board actions, Massachusetts 2023
Across 78 cases
2.11
Actions per 1,000 licensees
Massachusetts statewide rate
probation
Most common action type
29 cases

BORIM publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Massachusetts disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.

Brand vs generic prescribing mix · Typical

Rosemary Kirousis, ANP - brand share 12.0%
Nurse Practitioner average

12% brand-name claims vs 85% generic, on 426 2023 Medicare Part D claims.

The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

426
Total Claims
$14K
Total Drug Cost
237
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
435
Total Day Supply
5,315
Brand vs Generic
12% brand / 85% generic
Brand Drug Cost
$9K
Generic Drug Cost
$5K
Antibiotic Claims
184

Patient Demographics

Average Patient Age
68.6 years
Avg HCC Risk Score
1.41
Gender Split
61% female / 39% male
Age Distribution
<65: 62, 65-74: 91, 75-84: 64, 85+: 20

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

What Rosemary Kirousis, ANP prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Amoxicillin-Clavulanate Potass
Amoxicillin/Potassium Clav
55
Doxycycline Monohydrate
49
Prednisone
34
Mupirocin
28
Albuterol Sulfate Hfa
Albuterol Sulfate
26
Azithromycin
14
Cefpodoxime Proxetil
14
Diclofenac Sodium
13
Polymyxin B Sul-Trimethoprim
Polymyxin B Sulf/Trimethoprim
12
Cephalexin
11

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Nurse Practitioner Overview

How Rosemary Kirousis, ANP fits within the Nurse Practitioner landscape nationally.

87,227
Nurse Practitioner Providers in US
56
States with Nurse Practitioner
1,084
Avg Claims per Provider

Rosemary Kirousis, ANP's 426 claims are below the specialty average of 1,084.

Nearby Nurse Practitioner Providers in Massachusetts

Other clinicians with the same primary specialty enrolled in Massachusetts, drawn from the same CMS NPPES roster as Kirousis.

Compare Nurse Practitioner nationally: see state-by-state distribution →

Before you book an appointment

Use this federal record as your verification checklist, not as a recommendation.

  • Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
  • Check the active license and any disciplinary history with the Massachusetts medical board, federal registration is not a license check. Credential verification guide
  • Weigh a second option: compare this provider with a nearby Nurse Practitioner peer on Medicare volume and prescribing patterns. Compare providers

Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.

Frequently Asked Questions

What is Rosemary Kirousis, ANP's specialty?
Rosemary Kirousis, ANP specializes in Nurse Practitioner and practices in Worcester, Massachusetts. Credentials: ANP.
How much does Rosemary Kirousis, ANP prescribe under Medicare Part D?
In 2023, Rosemary Kirousis, ANP wrote 426 Medicare Part D claims totaling $14K in drug costs for 237 beneficiaries.
Where is Rosemary Kirousis, ANP located?
Rosemary Kirousis, ANP is located at 366 SHREWSBURY ST APT 3, Worcester, MA, 01604. Phone: (508) 595-2700.
What is Rosemary Kirousis, ANP's NPI number?
Rosemary Kirousis, ANP's National Provider Identifier (NPI) is 1609023985, issued on 08/19/2008.
Does Rosemary Kirousis, ANP prescribe more brand-name or generic drugs?
Rosemary Kirousis, ANP's prescribing is 12% brand-name and 85% generic drugs by claim count, with $9K in brand drug costs.
How many Nurse Practitioner providers are there in the US?
There are 87,227 Nurse Practitioner providers across 56 states in the US. The average Nurse Practitioner provider writes 1,084 Medicare Part D claims per year.
What drugs does Rosemary Kirousis, ANP prescribe most often?
Based on 2023 Medicare Part D data, Rosemary Kirousis, ANP's most frequently prescribed drugs include Amoxicillin-Clavulanate Potass, Doxycycline Monohydrate, Prednisone. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Rosemary Kirousis, ANP accept Medicare?
Rosemary Kirousis, ANP appears in CMS Medicare data with 426 Part D claims and 237 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Rosemary Kirousis, ANP's credentials?
Rosemary Kirousis, ANP's NPI is 1609023985 with credentials ANP. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.

Data Sources

Provider Directory
CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
Specialty Classification
NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
Prescribing Data
CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
Limitations
Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.

See our complete data methodology for details on how we collect and process government data.

Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).

Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology

Compiled from official public sources by the PlainDoctor editorial team.