Mackenzie Erin Delzer, MD
Obstetrics Physician · Green Bay, WI
Mackenzie Erin Delzer, MD is an obstetrics physician with a practice address in Green Bay, Wisconsin, and NPI 1669053781, issued on Apr 20, 2021. Check the license (Wisconsin 85962-20, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Mackenzie Erin Delzer
- Credential
- MD
- Primary taxonomy
- Obstetrics Physician 207VX0000X
- License number
- 85962-20 WI
Self-reported in NPPES; status is on the state search - Practice location
- 744 S Webster Ave, Green Bay, WI 54301
- Phone
- (920) 433-3500
- Enumerated
- Apr 20, 2021
- Record last updated
- Sep 17, 2025
- Medicare enrollment
- Enrolled (PECOS I20250929001912); accepts Medicare assignment
- Medical or professional school
- University Of Wisconsin School Of Medicine, 2021
- Entity
- Type 1 · individual
8 nearest obstetrics physician records → All 10 in Wisconsin → Look up another NPI →
Also registered at 744 S Webster Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Hannah Alsteen, FNP-CFamily Nurse Practitioner1649823881
- Kyle Anderson, CRNACertified Registered Nurse Anesthetist1205580313
- Lori Anderson, CRNACertified Registered Nurse Anesthetist1508953274
- Paul AndersonAnesthesiology Physician1750648481
Verify Mackenzie Erin Delzer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 85962-20Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
75% fewer Medicare Part D claims than the average obstetrics physician in 2024
55 Medicare Part D claims for 31 beneficiaries, against an average of 218 among the 863 providers of this specialty who prescribed in Part D. Brand-name drugs were 35% of claims. 19 claims were for opioids.
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
- Bellin Memorial Hospital IncGreen Bay, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mackenzie Erin Delzer among 10 obstetrics physician records in Wisconsin
Mackenzie Erin Delzer, MD is one of 10 obstetrics physician records with a practice address in Wisconsin. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 90% of them.
- NPI issued2021 · 90% of these records are older, 0% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 80% of these records are
- Record last updated2025 · 10% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207VX0000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Obstetrics Physician providers in Wisconsin
There are 10 obstetrics physician records in Wisconsin.
All 10 in Wisconsin → Every provider in Green Bay → Obstetrics Physician nationwide →
The 8 obstetrics physician records with the nearest ZIP codes
- Lauren Useem, D.O, MPHGreen Bay, WI 543011639520414
- Susan Koehler, APNPManitowoc, WI 542201366550436
- Madeleine Guevara, D.O.De Pere, WI 541151225254451
- Emily Linklater, DOHudson, WI 540161003132267
- Bridget Kelly, MDMadison, WI 537171851636369
- Kimberly Kuncl, MDMadison, WI 537151508850173
- Shannon Padgett, MDMadison, WI 537151639445323
- Patricia Rivera, M.D.Mount Pleasant, WI 534051144684242
Common questions
What is Mackenzie Erin Delzer, MD's NPI number?
Mackenzie Erin Delzer, MD's National Provider Identifier (NPI) is 1669053781, issued on Apr 20, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Mackenzie Erin Delzer, MD located?
The NPPES record lists a practice address at 744 S Webster Ave, Green Bay, WI, 54301. Phone: (920) 433-3500. Providers update this record themselves, so call before visiting.
How can I verify Mackenzie Erin Delzer, MD's license?
NPPES lists Wisconsin license number 85962-20, as entered by the provider. Search the Wisconsin Medical Examining Board at https://dsps.wi.gov/Pages/BoardsCouncils/MEB/Default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mackenzie Erin Delzer, MD prescribe under Medicare Part D?
In 2024, Mackenzie Erin Delzer, MD had 55 Medicare Part D claims for 31 beneficiaries; the average among obstetrics physician prescribers was 218. 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.