Dr. Bartosz J. Grzywacz, MD
- Medicare services, 2024
- 538
- Medicare patients, 2024
- 169
- Hospital affiliations
- 4
- Industry payments
- $67
- Medical groups
- 4
- Practice address
- 330 Brookline Avenue, Boston, MA 02215
- Practice phone
- Call (617) 667-7000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Grzywacz's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Bartosz J. Grzywacz is a pathologist in Boston, Massachusetts
Dr. Grzywacz practices at Beth Israel Deaconess Medical Center in Boston, Massachusetts, part of Beth Israel Lahey Health.
Dr. Grzywacz's NPI, 1386870251, was assigned on June 5, 2009. Dr. Grzywacz holds Minnesota license 107470.
- NPI
- 1386870251NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0941423800
- NPI enumeration date
- June 5, 2009
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (617) 667-7000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 53
- Medical school graduation
- 1999
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Bartosz J. Grzywacz practices at Beth Israel Deaconess Medical Center in Boston, Massachusetts
Dr. Grzywacz's primary practice is Beth Israel Deaconess Medical Center, at 330 Brookline Avenue, Boston, MA 02215 in Suffolk County. The practice phone is (617) 667-7000.
- Beth Israel Deaconess Medical Center330 Brookline Avenue, Boston, MA 02215 · Suffolk CountyPhone(617) 667-7000
Source: Dmand AI Affiliation Data
Dr. Bartosz J. Grzywacz is affiliated with 4 sites of care and 4 medical groups
Dr. Grzywacz's primary practice is Beth Israel Deaconess Medical Center in Boston, Massachusetts, part of Beth Israel Lahey Health. Dr. Grzywacz is also affiliated with Brigham and Women's Hospital. The medical group on file is M Health Fairview Recovery Clinic. Dmand AI also links Dr. Grzywacz to 2 more hospitals and 3 medical groups, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Bartosz J. Grzywacz's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Grzywacz practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Beth Israel Deaconess Medical Center | Available with a free account |
| +3 more sites and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Beth Israel Lahey Health and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Bartosz J. Grzywacz is one of 306 pathologists in Massachusetts
Anatomic pathology and clinical pathology is Dr. Grzywacz's primary specialty in the NPI Registry, under taxonomy code 207ZP0102X. Dr. Grzywacz is licensed in Minnesota.
Specialties and state licenses
- Anatomic pathology and clinical pathology, MinnesotaPrimary
Pathologists near Dr. Grzywacz
Counts of pathologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Bartosz J. Grzywacz billed Medicare for 538 services in 2024
CMS data shows 538 Medicare services from Dr. Grzywacz across 9 procedure codes in 2024, for 169 Medicare patients. Medicare paid $16,196 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Grzywacz's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Lab and pathology
- 2023: 6862024: 53822%
Dr. Grzywacz compared with the Massachusetts median for pathologists, 2024
- Dr. Grzywacz
- Massachusetts median
- Medicare services
- 538vs 1,36260% below
- Medicare patients
- 169vs 55570% below
Medians across 300 pathologists in Massachusetts with Dmand AI profiles that report each measure.
Dr. Grzywacz's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Grzywacz and other pathologists in Massachusetts.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Bartosz J. Grzywacz treated 169 Medicare patients in 2024, average age 72
CMS counts 169 Medicare patients who saw Dr. Grzywacz in 2024. The largest group is 65 to 74, with 77 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 22% are also on Medicaid. Their average risk score is 3.07, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Grzywacz's median patient age at 66, with 54% women.
Dr. Grzywacz's Medicare patients by age, 2024
Dr. Grzywacz's Medicare patients by sex, 2024
- Women7544%
- Men9456%
Chronic conditions among Dr. Grzywacz's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Chronic kidney disease43%
- Ischemic heart disease42%
- Arthritis40%
- Mood disorders37%
- Anxiety36%
- Diabetes36%
Share of Medicare patients with each condition. A patient can have several.
Dr. Grzywacz's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 66
Patient panel by sex, all payers
- Women54%
- Men45%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
How Dr. Bartosz J. Grzywacz takes part in Medicare
Dr. Grzywacz accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Bartosz J. Grzywacz received $67 in industry payments in 2019
CMS Open Payments shows 1 general payment to Dr. Grzywacz from 1 drug or device company in 2019. Food and beverage make up the largest share, 100% of the total. Stemline Therapeutics Inc. paid the most, $67.
Companies that paid Dr. Grzywacz the most, 2019 to 2019
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Bartosz J. Grzywacz's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Bartosz J. Grzywacz
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Bartosz J. Grzywacz's NPI number?
Dr. Bartosz J. Grzywacz's NPI number is 1386870251. It was assigned on June 5, 2009, and it is active in the NPI Registry.
What kind of doctor is Dr. Bartosz J. Grzywacz?
Dr. Bartosz J. Grzywacz is a pathologist in Boston, Massachusetts. The primary specialty in the NPI Registry is Anatomic Pathology & Clinical Pathology Physician (taxonomy code 207ZP0102X).
Where does Dr. Bartosz J. Grzywacz practice?
Dr. Grzywacz practices at 330 Brookline Avenue, Boston, MA 02215. Dr. Grzywacz's primary practice is Beth Israel Deaconess Medical Center in Boston, Massachusetts, part of Beth Israel Lahey Health. Dmand AI also links Dr. Grzywacz to 2 hospitals and 3 medical groups.
What is Dr. Bartosz J. Grzywacz's office phone number?
The practice phone on file for Dr. Grzywacz is (617) 667-7000.
What is Dr. Bartosz J. Grzywacz's medical license number?
Dr. Grzywacz holds Minnesota license 107470.
Which hospitals is Dr. Bartosz J. Grzywacz affiliated with?
Dr. Grzywacz practices at Beth Israel Deaconess Medical Center in Boston, Massachusetts. Dr. Grzywacz is also affiliated with Brigham and Women's Hospital. Dmand AI links Dr. Grzywacz to 2 more hospitals.
What medical group is Dr. Bartosz J. Grzywacz part of?
Dr. Grzywacz is linked to M Health Fairview Recovery Clinic. Dmand AI links Dr. Grzywacz to 3 more medical groups.
Does Dr. Bartosz J. Grzywacz accept Medicare?
Yes. CMS data shows Dr. Grzywacz billed Medicare for 538 services in 2024, and Dr. Grzywacz accepts Medicare assignment.
How many Medicare patients does Dr. Bartosz J. Grzywacz see?
CMS counts 169 Medicare patients who saw Dr. Grzywacz in 2024, with an average age of 72.
What services does Dr. Bartosz J. Grzywacz bill to Medicare?
In 2024, Dr. Grzywacz's most billed Medicare services were lab and pathology test (88341), lab and pathology test (88189) and lab and pathology test (88305).
Has Dr. Bartosz J. Grzywacz received payments from drug or device companies?
CMS Open Payments shows $67 in general payments to Dr. Grzywacz from 1 company from 2019 to 2019. The largest total came from Stemline Therapeutics Inc.
How long has Dr. Bartosz J. Grzywacz been practicing?
Dr. Grzywacz graduated from medical school in 1999, 27 years ago.
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