2026 NPPES data Hematology (Internal Medicine) Physician NPI 1376833723 M.D.
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BARTOSZ WALCZYSZYN, M.D.

Hematology (Internal Medicine) Physician in MOORESVILLE, North Carolina. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
770
Medicare Part D claims · 149 beneficiaries · Hematology (Internal Medicine) Physician avg: 693
What the federal data reveals: BARTOSZ WALCZYSZYN, M.D. is a Hematology (Internal Medicine) Physician ([object Object]) practicing in MOORESVILLE, North Carolina with a Medicare Part D prescribing footprint of 770 claims across 149 beneficiaries .

What stands out: BARTOSZ WALCZYSZYN, M.D. filed 770 Medicare Part D claims in 2023 across MOORESVILLE, North Carolina. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

BARTOSZ WALCZYSZYN, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation — signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

BARTOSZ WALCZYSZYN, M.D. at a glance

Quality data not reported

NPI registry status

Active

Issued 04/19/2011

NPI 1376833723

Primary specialty

Hematology (Internal Medicine) Physician

Niche

1,436 US NPIs in this specialty

Medicare Part D claims

770 11% vs specialty avg

2023 prescription claims

Specialty avg: 693

Specialty distribution in North Carolina

How Hematology (Internal Medicine) Physician compares to other specialties among North Carolina providers

North Carolina providers

Hematology (Internal Medicine) Physician share within North Carolina

1. Hematology (Internal Medicine) Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Hematology (Internal Medicine) Physician share within North Carolina

Specialty board-certification context

Estimated specialty board-certified rate — Hematology (Internal Medicine) Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Hematology (Internal Medicine) Physician ABMS/AOA estimate

Est. board-certified rate (Hematology (Internal Medicine) Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Hematology (Internal Medicine) Physician) — ABMS / AOA estimate

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).

BARTOSZ WALCZYSZYN, M.D. is a Hematology (Internal Medicine) Physician provider practicing in MOORESVILLE, North Carolina, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: M.D.. NPI: 1376833723. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

BARTOSZ WALCZYSZYN, M.D. appears in the CMS NPPES registry as a Hematology (Internal Medicine) Physician provider holding M.D. credentials at 170 MEDICAL PARK RD STE 101, MOORESVILLE, NC, 28117, with a listed phone of (980) 302-7070. NPI 1376833723 was issued on 04/19/2011. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what WALCZYSZYN 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 770 prescription claims written by this provider, covering 149 Medicare beneficiaries and totaling roughly $709K in drug spend, with an opioid prescribing rate of 4.7%. 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.

Hematology (Internal Medicine) Physician is a narrow specialty nationwide, with 1,436 enrolled providers across 50 states and an average of 693 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

170 MEDICAL PARK RD STE 101
MOORESVILLE, NC 28117

Provider Details

NPI 1376833723
Specialty Hematology (Internal Medicine) Physician
Credentials M.D.
Gender Male
NPI Issued 04/19/2011

Hospital and facility affiliations

Facilities where BARTOSZ WALCZYSZYN, M.D. 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.

THE PRESBYTERIAN HOSPITAL
MOORESVILLE, NC

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

Medicare Part D Prescribing Data

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

770
Total Claims
$709K
Total Drug Cost
149
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
999
Total Day Supply
27,659
Generic Drug Cost
$148K
Opioid Claims
36 (4.7% rate)
Antibiotic Claims
39

Patient Demographics

Average Patient Age
72.4 years
Avg HCC Risk Score
1.96
Gender Split
59% female / 41% male
Age Distribution
<65: 15, 65-74: 77, 75-84: 45, 85+: 12

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Eliquis
Apixaban
130
Prednisone
50
Hydroxyurea
45
Xarelto
Rivaroxaban
40
Anastrozole
37
Albuterol Sulfate Hfa
Albuterol Sulfate
23
Letrozole
23
Sulfamethoxazole-Trimethoprim
Sulfamethoxazole/Trimethoprim
22
Prochlorperazine Maleate
21
Duloxetine Hcl
19

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

Hematology (Internal Medicine) Physician Overview

How BARTOSZ WALCZYSZYN, M.D. fits within the Hematology (Internal Medicine) Physician landscape nationally.

1,436
Hematology (Internal Medicine) Physician Providers in US
50
States with Hematology (Internal Medicine) Physician
693
Avg Claims per Provider

BARTOSZ WALCZYSZYN, M.D.'s 770 claims are above the specialty average of 693.

Nearby Hematology (Internal Medicine) Physician Providers in North Carolina

Other clinicians with the same primary specialty enrolled in North Carolina, drawn from the same CMS NPPES roster as WALCZYSZYN.

Compare Hematology (Internal Medicine) Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is BARTOSZ WALCZYSZYN, M.D.'s specialty?
BARTOSZ WALCZYSZYN, M.D. specializes in Hematology (Internal Medicine) Physician and practices in MOORESVILLE, North Carolina. Credentials: M.D..
How much does BARTOSZ WALCZYSZYN, M.D. prescribe under Medicare Part D?
In 2023, BARTOSZ WALCZYSZYN, M.D. wrote 770 Medicare Part D claims totaling $709K in drug costs for 149 beneficiaries.
Where is BARTOSZ WALCZYSZYN, M.D. located?
BARTOSZ WALCZYSZYN, M.D. is located at 170 MEDICAL PARK RD STE 101, MOORESVILLE, NC, 28117. Phone: (980) 302-7070.
What is BARTOSZ WALCZYSZYN, M.D.'s NPI number?
BARTOSZ WALCZYSZYN, M.D.'s National Provider Identifier (NPI) is 1376833723, issued on 04/19/2011.
Does BARTOSZ WALCZYSZYN, M.D. prescribe opioids?
Yes, BARTOSZ WALCZYSZYN, M.D. had 36 opioid claims in 2023 with an opioid prescribing rate of 4.7%.
How many Hematology (Internal Medicine) Physician providers are there in the US?
There are 1,436 Hematology (Internal Medicine) Physician providers across 50 states in the US. The average Hematology (Internal Medicine) Physician provider writes 693 Medicare Part D claims per year.
What drugs does BARTOSZ WALCZYSZYN, M.D. prescribe most often?
Based on 2023 Medicare Part D data, BARTOSZ WALCZYSZYN, M.D.'s most frequently prescribed drugs include Eliquis, Prednisone, Hydroxyurea. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does BARTOSZ WALCZYSZYN, M.D. accept Medicare?
BARTOSZ WALCZYSZYN, M.D. appears in CMS Medicare data with 770 Part D claims and 149 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify BARTOSZ WALCZYSZYN, M.D.'s credentials?
BARTOSZ WALCZYSZYN, M.D.'s NPI is 1376833723 with credentials M.D.. 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