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BARTOSZ J GRZYWACZ M.D.
NPI 1386870251
Pathology - Anatomic Pathology & Clinical Pathology in Madison, WI

Active since June 05, 2009PECOS EnrolledAccepts Medicare Assignment
81.72/100
CMS Quality Rating
UW HOSPITAL AND CLINICS, 600 HIGHLAND AVE, H4/831, MADISON, WI 53792(608) 263-0572(608) 890-7127 Get Directions Write a Review

NPPES record last updated: April 28, 2014. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Bartosz J Grzywacz M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

BARTOSZ J GRZYWACZ M.D. (NPI 1386870251) is an individual anatomic pathology & clinical pathology provider in Madison, Wisconsin, licensed in Minnesota (107470) and active in the NPI registry since June 2009. He is enrolled in Medicare PECOS, is affiliated with Beth Israel Deaconess Hospital Plymouth, and is a graduate of Other (1999).

NPPES Registry Identity

NPI1386870251
Entity TypeIndividualMale
Primary Taxonomy207ZP0102X
Provider Legal NameBARTOSZ J GRZYWACZCredential: M.D.
Location AddressUW HOSPITAL AND CLINICS, 600 HIGHLAND AVE, H4/831Madison, WI 53792-0001
Mailing AddressUw Hospital And Clinics, 600 Highland Ave, H4/831Madison, WI 53792-0001 · Fax (608) 890-7127
Phone(608) 263-0572
Fax(608) 890-7127
Sole ProprietorNo
Medical School CMSOtherGraduated 1999
Enumeration DateJune 5, 2009
Last NPPES UpdateApril 28, 2014
✔ NPI 1386870251 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPathology · Anatomic Pathology & Clinical PathologyAllopathic & Osteopathic Physicians
Taxonomy Code207ZP0102X
License✔ Licensed in MN · 107470
Definition
A pathologist deals with the causes and nature of disease and contributes to diagnosis, prognosis and treatment through knowledge gained by the laboratory application of the biologic, chemical and physical sciences. A pathologist uses information gathered from the microscopic examination of tissue specimens, cells and body fluids, and from clinical laboratory tests on body fluids and secretions for the diagnosis, exclusion and monitoring of disease.
Also ListedPathology · HematologyTaxonomy 207ZH0000X · License 107470 (MN)
UW HOSPITAL AND CLINICS, Madison, WI 53792
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Taro Health.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Bartosz J Grzywacz M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID941423800
PECOS Enrollment IDI20240710001134
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

4

Medicare enrollment records show Bartosz Grzywacz reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Healtheast Medical Research Institute
214 mi
Clinic/Center
6936 PINE ARBOR DRIVE SOUTH, SUITE 100
Cottage Grove, MN 55016
  • Reassigned Medicare billing, Minnesota enrollment
  • 2,361 clinicians in this Medicare group
NPI 1801842729 (651) 326-5800
Fairview Express Care
216 mi
Pediatric Rehabilitation Medicine
9680 TAMARACK RD, SUITE 130
Woodbury, MN 55125
  • Reassigned Medicare billing, Minnesota enrollment
  • 3,633 clinicians in this Medicare group
NPI 1700235587 (612) 273-1172
Fairview Health Services
224 mi
General Acute Care Hospital
201 E NICOLLET BLVD, OUTREACH LAB DEPARTMENT
Burnsville, MN 55337
  • Reassigned Medicare billing, Minnesota enrollment
  • 4,038 clinicians in this Medicare group
NPI 1225199128 (952) 892-2085
Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc
932 mi
Internal Medicine
330 BROOKLINE AVE
Boston, MA 02215
  • Reassigned Medicare billing, Massachusetts enrollment
  • Also billed through NPI 1346281938 (Massachusetts)
  • 2,579 clinicians in this Medicare group
NPI 1194765438 (617) 754-9600

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 9

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Special stained specimen slides to examine tissue, each additional procedure 88341
Special stained specimen slides are used to analyze tissue in detail. In this process, extra procedures may be needed for a more thorough examination. These involve applying special stains to the tissue on slides, enhancing specific elements for closer study.
204 services45 patients
Flow cytometry technique for dna or cell analysis, 16 or more markers 88189
Flow cytometry is a method used to measure and analyze cells. It uses a beam of light to detect up to 16 or more markers on cells, helping to identify their type, function, or abnormalities. This technique aids in diagnosing various health conditions.
66 services60 patients
Pathology examination of tissue using a microscope, intermediate complexity 88305
A pathology examination of tissue with intermediate complexity involves studying a small sample of your body tissue under a microscope. This helps in identifying any abnormal cells or signs of disease. It's a detailed process requiring expert analysis to ensure accurate results.
48 services43 patients
Special stained specimen slides to examine tissue, initial procedure 88342
This procedure involves the use of specially stained slides to examine tissue samples. The initial process involves obtaining a small tissue sample from your body. This sample is then placed on a slide and stained with special dyes to highlight different structures and elements. The stained slide is then examined under a microscope to help diagnose any potential health issues.
48 services44 patients
Preparation of tissue for examination by removing any calcium present 88311
This procedure involves treating tissue samples to remove any calcium, which can interfere with the examination. The tissue is soaked in a special solution that safely dissolves the calcium, leaving the tissue intact for accurate analysis. This helps in making precise diagnoses.
40 services38 patients
Bone marrow, smear interpretation 85097
Bone marrow smear interpretation is a procedure where a small sample of your bone marrow is taken and examined under a microscope. This helps doctors identify any abnormal cells or signs of diseases such as anemia, leukemia, or infections. It's a crucial step in diagnosing various blood disorders.
38 services36 patients

Hospital Affiliations CMS Care Compare 4

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Beth Israel Deaconess Hospital Plymouth

Acute Care Hospitals · Plymouth, MA
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number220060
Location275 Sandwich StreetPlymouth, MA 02360 · Plymouth County
Emergency services Birthing friendly

Beth Israel Deaconess Hospital - Needham

Acute Care Hospitals · Needham, MA
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number220083
Location148 Chestnut StreetNeedham, MA 02494 · Norfolk County
Emergency services

Beth Israel Deaconess Medical Center

Acute Care Hospitals · Boston, MA
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number220086
Location330 Brookline AvenueBoston, MA 02215 · Suffolk County
Emergency services Birthing friendly

Brigham And Women's Hospital

Acute Care Hospitals · Boston, MA
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number220110
Location75 Francis StreetBoston, MA 02115 · Suffolk County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 53792 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$123.69 typical visit price
range $53.90 – $163.24
Typical copayment $30.92 (range $13.47 – $40.81)
Most-billed visit code 99204
Established Patient
$95.41 typical visit price
range $17.40 – $133.76
Typical copayment $23.85 (range $4.35 – $33.44)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

81.72/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality69.86
Promoting Interoperability100
Improvement Activities40
Cost59.73

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DINA MARIE PITTA MD
Surgery
UW HOSPITAL AND CLINICS, 600 HIGHLAND AVE
MADISON, WI 53792
Dane County (608) 263-6400
CAN M SAVASMAN M.D.
Student in an Organized Health Care Education/Training Program
UW HOSPITAL AND CLINICS, 600 HIGHLAND AVE, H4/831
MADISON, WI 53792
Dane County (608) 262-7158
JUDITH NIR M.D.
Student in an Organized Health Care Education/Training Program
UW HOSPITAL AND CLINICS, 600 HIGHLAND AVE, H4/831
MADISON, WI 53792
Dane County (608) 263-0572
MADELYN KAY ALVAREZ MD
Internal Medicine
UW HOSPITAL AND CLINICS, 600 HIGHLAND AVE, H4/831
MADISON, WI 53792
Dane County (608) 263-5660
DR. IAN JOSEPH KOSZEWSKI M.D.
Otolaryngology
UW HOSPITAL AND CLINICS, 600 HIGHLAND AVE, H4/831
MADISON, WI 53792
Dane County (608) 263-0192
DR. AMIN AFRAZI MD,PH.D
Surgery
UW HOSPITAL AND CLINICS, 600 HIGHLAND AVE, H4/831
MADISON, WI 53792
Dane County (608) 263-1377
DANIEL R MATSON
Pathology (Hematology)
UW HOSPITAL AND CLINICS, 600 HIGHLAND AVENUE
MADISON, WI 53792
Dane County (608) 263-8443
MEGAN E PETERS M.D.
Pediatrics (Pediatric Critical Care Medicine)
UW HOSPITAL AND CLINICS, 600 HIGHLAND AVE
MADISON, WI 53792
Dane County (608) 263-8049

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Bartosz Grzywacz's NPI number?

The NPI number for Bartosz Grzywacz is 1386870251. It was assigned to this individual provider in the NPPES registry on June 5, 2009.

Where is Bartosz Grzywacz located?

Bartosz Grzywacz practices at Uw Hospital And Clinics 600 Highland Ave, H4/831, Madison, WI 53792. The listed phone number is (608) 263-0572.

What is Bartosz Grzywacz's specialty?

The primary specialty registered for this NPI is Pathology, specializing in Anatomic Pathology & Clinical Pathology, with taxonomy code 207ZP0102X.

Is Bartosz Grzywacz enrolled in Medicare?

Yes. Bartosz Grzywacz is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Bartosz Grzywacz's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Bartosz Grzywacz reassigns Medicare benefits to 4 organizations: Healtheast Medical Research Institute (Cottage Grove, MN), Fairview Express Care (Woodbury, MN), Fairview Health Services (Burnsville, MN) and Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc (Boston, MA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Bartosz Grzywacz's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Bartosz Grzywacz accept?

Health plans from Taro Health list Bartosz Grzywacz as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Bartosz Grzywacz affiliated with any hospitals?

According to CMS data, Bartosz Grzywacz is affiliated with Beth Israel Deaconess Hospital Plymouth, Beth Israel Deaconess Hospital - Needham, Beth Israel Deaconess Medical Center and Brigham And Women's Hospital.

When was this NPI record last updated?

The NPPES record for Bartosz Grzywacz was last updated on April 28, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.