Mary Margaret Krzystowczyk, NP
Primary Care Nurse Practitioner · Traverse City, MI
Mary Margaret Krzystowczyk, NP is a primary care nurse practitioner with a practice address in Traverse City, Michigan, and NPI 1912504978, issued on Oct 2, 2020. Check the license (Michigan 4704301134, as entered in NPPES) with the Michigan board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Mary Margaret Krzystowczyk
- Credential
- NP
- Primary taxonomy
- Primary Care Nurse Practitioner 363LP2300X
- License numbers
- 4704301134 MI
AG01200132 CO
Self-reported in NPPES; status is on the state search - Practice location
- 1105 Sixth St, Traverse City, MI 49684
- Phone
- (231) 935-5000
- Enumerated
- Oct 2, 2020
- Record last updated
- Jul 16, 2026
- Medicare enrollment
- Enrolled (PECOS I20211229001321); may accept Medicare assignment
- Entity
- Type 1 · individual
8 nearest primary care nurse practitioner records → All 426 in Michigan → Look up another NPI →
Also registered at 1105 Sixth St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Patricia Amalfitano, LMSWClinical Social Worker1083044432
Verify Mary Margaret Krzystowczyk in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Michigan board licenses this profession
Search for license 4704301134Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
88% fewer Medicare Part D claims than the average primary care nurse practitioner in 2024
185 Medicare Part D claims for 51 beneficiaries, against an average of 1,492 among the 5,992 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims. 52 claims were for opioids.
Most prescribed
- Quetiapine Fumarate28 claims
- Sertraline Hcl15 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Northstar Palliative Care IncAnn Arbor, MI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mary Margaret Krzystowczyk among 426 primary care nurse practitioner records in Michigan
Mary Margaret Krzystowczyk, NP is one of 426 primary care nurse practitioner records with a practice address in Michigan. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2020, is newer than 60% of them.
- NPI issued2020 · 60% of these records are older, 30% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 55% of these records are
- Graduated2018 · median 2018 among the 235 with a school on file
- Record last updated2026 · 46% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LP2300X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Primary Care Nurse Practitioner providers in Michigan
There are 426 primary care nurse practitioner records in Michigan.
All 426 in Michigan → Every provider in Traverse City → Primary Care Nurse Practitioner nationwide →
The 8 primary care nurse practitioner records with the nearest ZIP codes
- Ashleigh Catton, FNPTraverse City, MI 496841720705940
- Michael Hughes, DNPTraverse City, MI 496861609643766
- Koleen Kerlin-Spigarelli, FNPSuttons Bay, MI 496821184134355
- Kimberly Oldenburg, NPSuttons Bay, MI 496821659977510
- Susan Wilkinson, FNP-CTraverse City, MI 496861174118293
- Cindy Craig, AGNP-CWilliamsburg, MI 496901447859731
- Elizabeth Tuck, FNP-CLake City, MI 496511609361807
- Tracy Worcester, RNGaylord, MI 497351336526078
Common questions
What is Mary Margaret Krzystowczyk, NP's NPI number?
Mary Margaret Krzystowczyk, NP's National Provider Identifier (NPI) is 1912504978, issued on Oct 2, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Mary Margaret Krzystowczyk, NP located?
The NPPES record lists a practice address at 1105 Sixth St, Traverse City, MI, 49684. Phone: (231) 935-5000. Providers update this record themselves, so call before visiting.
How can I verify Mary Margaret Krzystowczyk, NP's license?
NPPES lists Michigan license number 4704301134, as entered by the provider. Search the Michigan board that licenses this profession; the NPPES record confirms identity only.
How much does Mary Margaret Krzystowczyk, NP prescribe under Medicare Part D?
In 2024, Mary Margaret Krzystowczyk, NP had 185 Medicare Part D claims for 51 beneficiaries; the average among primary care nurse practitioner prescribers was 1,492. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.