NPI registry status
Active
2026 NPPES data Gastroenterology Physician NPI 1427119429 M.D.
Verify on CMS → Rex Antinozzi, M.D.
Gastroenterology Physician in Traverse City, Michigan.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 16,601 in Gastroenterology 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
880
Medicare Part D claims · 438 beneficiaries · Gastroenterology Physician avg: 833
What the federal data shows
Rex Antinozzi, M.D. filed 880 Medicare Part D claims in 2023 as a Gastroenterology Physician in Traverse City, Michigan.
- 880
- Part D claims, 2023
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.
Rex Antinozzi, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
880 Top 27% higher than 73% of 1,370,886 prescribers
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.
Source CMS Medicare Part D Prescriber Public Use File · 2023
◑
Board-eligible specialty (heuristic, not verified)
Rex Antinozzi, M.D. practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Rex Antinozzi, M.D.?
Quality data not reportedPrimary specialty
Gastroenterology Physician
Medicare Part D claims
880 6% vs specialty avg
Specialty distribution in Michigan
How Gastroenterology Physician compares to other specialties among Michigan 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 Gastroenterology 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).
Rex Antinozzi, M.D. appears in the CMS NPPES registry as a Gastroenterology Physician provider holding M.D. credentials at 4100 PARK FOREST DR, Traverse City, MI, 49684, with a listed phone of (231) 935-5710. NPI 1427119429 was issued on 12/13/2006.
Medicare Part D records for calendar year 2023 show 880 prescription claims written by this provider, covering 438 Medicare beneficiaries and totaling roughly $701K in drug spend.
Gastroenterology Physician is a mid-sized specialty nationwide, with 16,601 enrolled providers across 54 states and an average of 833 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
Provider Details
| NPI | 1427119429 |
|---|---|
| Specialty | Gastroenterology Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 12/13/2006 |
License & disciplinary context - Michigan MI-BOM 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~41K Michigan medical licensees in 2023 - they are NOT specific to Rex Antinozzi, M.D.. To verify Rex Antinozzi, M.D.'s current license status, search the MI-BOM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
123
Total board actions, Michigan 2023
Across 120 cases
3.00
Actions per 1,000 licensees
Michigan statewide rate
probation
Most common action type
44 cases
MI-BOM publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Michigan disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
880
Total Claims
$701K
Total Drug Cost
438
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,604
- Total Day Supply
- 38,648
- Generic Drug Cost
- $105K
- Antibiotic Claims
- 17
Patient Demographics
- Average Patient Age
- 72.4 years
- Avg HCC Risk Score
- 0.96
- Gender Split
- 55% female / 45% male
- Age Distribution
- <65: 29, 65-74: 238, 75-84: 156, 85+: 15
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Rex Antinozzi, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Omeprazole
Omeprazole
77 claims
- Peg 3350-Electrolyte
Peg 3350-Electrolyte
66 claims
- Pantoprazole Sodium
Pantoprazole Sodium
55 claims
- Mesalamine
Mesalamine
49 claims
- Dicyclomine Hcl
Dicyclomine Hcl
39 claims
- Famotidine 24
Famotidine
24 claims
- Colestipol Hcl 20
Colestipol Hcl
20 claims
- Stelara 20
Stelara
20 claims
| Drug | Claims |
|---|---|
| Omeprazole | 77 |
| Peg 3350-Electrolyte Sodium Chloride/Nahco3/Kcl/Peg | 66 |
| Pantoprazole Sodium | 55 |
| Mesalamine | 49 |
| Dicyclomine Hcl | 39 |
| Famotidine | 24 |
| Colestipol Hcl | 20 |
| Stelara Ustekinumab | 20 |
| Lansoprazole | 19 |
| Mercaptopurine | 19 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Gastroenterology Physician Overview
How Rex Antinozzi, M.D. fits within the Gastroenterology Physician landscape nationally.
16,601
Gastroenterology Physician Providers in US
54
States with Gastroenterology Physician
833
Avg Claims per Provider
Rex Antinozzi, M.D.'s 880 claims are above the specialty average of 833.
Nearby Gastroenterology Physician Providers in Michigan
Other clinicians with the same primary specialty enrolled in Michigan, drawn from the same CMS NPPES roster as Antinozzi.
Dr. Amir Abadir
M.D.
Lansing, MI
Mohamed Abdallah
Royal Oak, MI
Dr. Mohannad Abousaleh
MD
Ypsilanti, MI
Dr. Megan Adams
MD
Ann Arbor, MI
Dr. Larry Adler
M.D.
Ypsilanti, MI
Compare Gastroenterology Physician nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Michigan medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Gastroenterology Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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Frequently Asked Questions
What is Rex Antinozzi, M.D.'s specialty? ▼
Rex Antinozzi, M.D. specializes in Gastroenterology Physician and practices in Traverse City, Michigan. Credentials: M.D..
How much does Rex Antinozzi, M.D. prescribe under Medicare Part D? ▼
In 2023, Rex Antinozzi, M.D. wrote 880 Medicare Part D claims totaling $701K in drug costs for 438 beneficiaries.
Where is Rex Antinozzi, M.D. located? ▼
Rex Antinozzi, M.D. is located at 4100 PARK FOREST DR, Traverse City, MI, 49684. Phone: (231) 935-5710.
What is Rex Antinozzi, M.D.'s NPI number? ▼
Rex Antinozzi, M.D.'s National Provider Identifier (NPI) is 1427119429, issued on 12/13/2006.
How many Gastroenterology Physician providers are there in the US? ▼
There are 16,601 Gastroenterology Physician providers across 54 states in the US. The average Gastroenterology Physician provider writes 833 Medicare Part D claims per year.
What drugs does Rex Antinozzi, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Rex Antinozzi, M.D.'s most frequently prescribed drugs include Omeprazole, Peg 3350-Electrolyte, Pantoprazole Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Rex Antinozzi, M.D. accept Medicare? ▼
Rex Antinozzi, M.D. appears in CMS Medicare data with 880 Part D claims and 438 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Rex Antinozzi, M.D.'s credentials? ▼
Rex Antinozzi, M.D.'s NPI is 1427119429 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
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 (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
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 May 2026.