NPI registry status
Active
2026 NPPES data Obstetrics Physician NPI 1669053781 MD
Verify on CMS → Mackenzie Delzer, MD
Obstetrics Physician in Green Bay, Wisconsin.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 1,420 in Obstetrics Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
55
Medicare Part D claims · 31 beneficiaries · Obstetrics Physician avg: 331
Generic prescribing
65%
generic claims · 35% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Mackenzie Delzer, MD filed 55 Medicare Part D claims in 2024 as an Obstetrics Physician in Green Bay, Wisconsin, prescribing 65% generic.
- 55
- Part D claims, 2024
- 65%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥0th
- pct by Part D claim volume (lower-bound band)
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Federal trust snapshot
What official records show about Mackenzie Delzer, MD
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1669053781), first enumerated 04/20/2021.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 55 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1669053781 · Obstetrics Physician
NPI-10 · ENUM-RECENT · TAX-NARROW · RX-TRACE · BOOK-THIN · PHOTO-ENUM
- NPI-10 1669053781
- ENUM-RECENT 2021
- TAX-NARROW 1,420
- RX-TRACE 55
- BOOK-THIN 15 in Wisconsin
- PHOTO-ENUM Mackenzie Wahl, MD · 2021
Mackenzie Delzer, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
55 ≥ 0th percentile 0% of 1,416,883 prescribers are in lower value bands
Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2024
✓
Board certification likely (heuristic, not verified)
Mackenzie Delzer, MD 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).
What does the federal data show about Mackenzie Delzer, MD?
Quality data not reportedPrimary specialty
Obstetrics Physician
Medicare Part D claims
55 83% vs specialty avg
Specialty distribution in Wisconsin
How Obstetrics Physician compares to other specialties among Wisconsin providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Obstetrics Physician. Verify directly:
How MIPS and board certification work
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).
Practice Address
Provider Details
| NPI | 1669053781 |
|---|---|
| Specialty | Obstetrics Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 04/20/2021 |
Hospital and facility affiliations
Facilities where Mackenzie Delzer, MD 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.
Bellin Memorial Hospital Inc
Green Bay, WI
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Brand vs generic prescribing mix · Above average
Mackenzie Delzer, MD - brand share 35.0%
Obstetrics Physician average
35% brand-name claims vs 65% generic, on 55 2024 Medicare Part D claims.
The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2024.
55
Total Claims
$5K
Total Drug Cost
31
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 61.9
- Total Day Supply
- 925
- Brand vs Generic
- 35% brand / 65% generic
- Brand Drug Cost
- $4K
- Generic Drug Cost
- $605
- Opioid Claims
- 19 (34.5% rate)
Patient Demographics
- Average Patient Age
- 65.9 years
- Avg HCC Risk Score
- 1.06
- Gender Split
- 100% female / 0% male
Obstetrics Physician Overview
How Mackenzie Delzer, MD fits within the Obstetrics Physician landscape nationally.
1,420
Obstetrics Physician Providers in US
54
States with Obstetrics Physician
331
Avg Claims per Provider
Mackenzie Delzer, MD's 55 claims are below the specialty average of 331.
Nationwide Obstetrics Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Delzer, both outside Wisconsin so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2021)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Obstetrics Physician Providers in Wisconsin
Other clinicians with the same primary specialty enrolled in Wisconsin, drawn from the same CMS NPPES roster as Delzer.
One of 15 Obstetrics Physician providers enrolled in Wisconsin, 5 are shown here.
Dr. Jeremy Bell
DO
Fond Du Lac, WI
Dr. Milinda Carson
M.D.
Madison, WI
Emily Chiu
Madison, WI
Dr. Jessica Chung
MD, MPH
Milwaukee, WI
Dr. Jeffrey Dinges
MD
Monroe, WI
Compare Obstetrics Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Mackenzie Delzer, MD's specialty? ▼
Mackenzie Delzer, MD specializes in Obstetrics Physician and practices in Green Bay, Wisconsin. Credentials: MD.
How much does Mackenzie Delzer, MD prescribe under Medicare Part D? ▼
In 2024, Mackenzie Delzer, MD wrote 55 Medicare Part D claims totaling $5K in drug costs for 31 beneficiaries.
Where is Mackenzie Delzer, MD located? ▼
Mackenzie Delzer, MD is located at 744 S WEBSTER AVE, Green Bay, WI, 54301. Phone: (920) 433-3500.
What is Mackenzie Delzer, MD's NPI number? ▼
Mackenzie Delzer, MD's National Provider Identifier (NPI) is 1669053781, issued on 04/20/2021.
Does Mackenzie Delzer, MD prescribe more brand-name or generic drugs? ▼
Mackenzie Delzer, MD's prescribing is 35% brand-name and 65% generic drugs by claim count, with $4K in brand drug costs.
Does Mackenzie Delzer, MD prescribe opioids? ▼
Yes, Mackenzie Delzer, MD had 19 opioid claims in 2024 with an opioid prescribing rate of 34.5%.
How many Obstetrics Physician providers are there in the US? ▼
There are 1,420 Obstetrics Physician providers across 54 states in the US. The average Obstetrics Physician provider writes 331 Medicare Part D claims per year.
Does Mackenzie Delzer, MD accept Medicare? ▼
Mackenzie Delzer, MD appears in CMS Medicare data with 55 Part D claims and 31 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Mackenzie Delzer, MD's credentials? ▼
Mackenzie Delzer, MD's NPI is 1669053781 with credentials MD. 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
View source datasets and methodology notes
- 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 (2024). 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 August 2026 (NPPES) / 2024 (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
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of August 2026.