Walter J Zawacki , NP
Nurse Practitioner • Worcester, MA
119 Belmont St
Worcester, MA 016052903
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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NPI assigned on October 4, 2006; this date does not establish years in practice.
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Published CMS data list 121 Original Medicare Part B services in 2021.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2021. Published rows only; this is not a quality measure.
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Published Part B service records, 2021:
- 49083 — Drainage of fluid from abdominal cavity using imaging guidance: 92 service units.
- 36573 — Insertion of tube for infusion with imaging guidance and review by radiologist, patient 5 years or older: 18 service units.
- 99152 — Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older): 11 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2021. Units differ by code; these are not visits or a measure of quality.
CPT® only copyright 2020 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2021). CPT notice
See the full table · Guide: How to read Medicare Part B data
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Medicare Part B services went from 334 in 2017 to 121 in 2021.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2017–2021.
Practice Location & Contact Primary Location
119 Belmont St
Worcester, MA 016052903
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
What Public CMS Data Show
Nurse Practitioner: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare-allowed amount
About $10,194 in 2021
The total amount Medicare approved for these services in 2021. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.
It shows the total cost of this clinician's Original Medicare services under Medicare's fee rules.
What this does not show: Medicare-allowed amount
This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2021.
Paid by Medicare
About $8,094 in 2021
The part of the Medicare-allowed amount that Medicare itself paid in 2021, after patients' deductibles and coinsurance.
The gap between the allowed amount and this number is roughly what patients and their other insurance paid.
What this does not show: Paid by Medicare
This is not the clinician's income and not a measure of quality.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2021.
Industry payments (Open Payments)
No Open Payments records are listed for this clinician for 2021–2025.
NPI first issued
2006
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Medicare assignment not listed
CMS data do not show whether this clinician accepts Medicare assignment. This does not mean they do not accept Medicare. Ask the office.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, “Does your provider accept Medicare as full payment?”
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Compared with the same specialty in Worcester and Massachusetts
Billing and prescribing volume is not a quality rating.
Medicare Part B
Comparisons use 2024 data. The latest CMS data for Walter Zawacki are from 2021.
499 active clinicians are listed under Nurse Practitioner with a practice address in Worcester, MA (3,483 in Massachusetts).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Worcester
17.8% of these 499 clinicians have the CMS telehealth indicator.
57.7% of these 499 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part B services
Medicare Part B services decreased 64% from 334 in 2017 to 121 in 2021.
- 2017: 334
- 2018: 283
- 2019: 268
- 2020: 166
- 2021: 121
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Medicare-allowed amount
Medicare-allowed amount decreased 49% from $20,051 in 2017 to $10,194 in 2021.
- 2017: $20,051
- 2018: $16,897
- 2019: $22,223
- 2020: $12,456
- 2021: $10,194
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Paid by Medicare
Paid by Medicare decreased 49% from $15,919 in 2017 to $8,094 in 2021.
- 2017: $15,919
- 2018: $13,238
- 2019: $17,627
- 2020: $9,918
- 2021: $8,094
Sources: CMS Medicare Physician & Other Practitioners (2021), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
Performed Procedures & Service Volume
CPT® is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016–2020 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners – by Provider and Service data, 2017–2021; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.
| HCPCS Code | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
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49083
Drainage of fluid from abdominal cavity using imaging guidance
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92 | 25 | $1500.00 | $94.82 |
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36573
Insertion of tube for infusion with imaging guidance and review by radiologist, patient 5 years or older
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18 | 18 | $919.17 | $74.95 |
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99152
Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes
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11 | 11 | $239.00 | $11.06 |
Source: CMS Part B by Provider and Service, 2021; services under 11 beneficiaries omitted by CMS. Privacy limits
Submitted charges are billed amounts, not a price quote for your visit.
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2021-06-01NUCC Taxonomy Code: 363L00000X
(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.
Additional State Medicaid & Healthcare Payer Identifiers
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Internal Medicine
Doctor of Medicine (M.D.)
Family Medicine
Doctor of Medicine (M.D.)
Internal Medicine
Doctor of Medicine (M.D.)
Internal Medicine
Doctor of Medicine (M.D.)
Internal Medicine
Doctor of Medicine (M.D.)
Nurse Practitioner
Certified Nurse Practitioner
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 119 BELMONT ST, WORCESTER, MA 016052903 (Tel: 5083348934)
Registered at PO BOX 415348, BOSTON, MA 022415348 (Tel: 8002258885)
NPI status registered as active in NPPES database
Registered at 55 FRUIT STREET, BOSTON, MA 02114 (Tel: 6177268315)
Registered at PO BOX 9142, MASS GENERAL PHYSICIANS ORGANIZATION INC, CHARLESTOWN, MA 021299142 (Tel: 6177240287)
Recorded as WALTER ZAWACKI, NP
Nurse Practitioner (license number reported to NPPES: MA 262962)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Nurse Practitioners in Worcester
- Mary Decesare-Flaherty, NP-C
- Emily Young, NP
- Caitlin Pasquale, NP
- Theresa Mazzarelli, ACNP
- Kaileigh Lavin, CNP
- Anthony Booker-Wilkinson, NP
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Mailing Address
Po Box 415348
Boston, MA 022415348
Phone: 8002258885