NPI registry status
Active
2026 NPPES data Internal Medicine Physician NPI 1326018730 MD FACP
Verify on CMS → Michael Weisz, MD FACP
Internal Medicine Physician in Tulsa, Oklahoma.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 172,737 in Internal Medicine 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
194
Medicare Part D claims · 58 beneficiaries · Internal Medicine Physician avg: 3K
Industry payments
$17.05
1 payments · CMS Open Payments (Sunshine Act)
What the federal data shows
Michael Weisz, MD FACP filed 194 Medicare Part D claims in 2023 as an Internal Medicine Physician in Tulsa, Oklahoma.
- 194
- Part D claims, 2023
- Likely
- board-certified (heuristic)
- ≥35th
- 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.
Michael Weisz, MD FACP's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
194 ≥ 35th percentile 35% of 1,370,886 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 · 2023
✓
Board certification likely (heuristic, not verified)
Michael Weisz, MD FACP 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 Michael Weisz, MD FACP?
Quality data not reportedPrimary specialty
Internal Medicine Physician
Medicare Part D claims
194 93% vs specialty avg
Specialty distribution in Oklahoma
How Internal Medicine Physician compares to other specialties among Oklahoma 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 Internal Medicine 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).
Michael Weisz, MD FACP appears in the CMS NPPES registry as an Internal Medicine Physician provider holding MD FACP credentials at 4444 E 41ST ST, Tulsa, OK, 74135, with a listed phone of (918) 619-4101. NPI 1326018730 was issued on 01/26/2006.
Medicare Part D records for calendar year 2023 show 194 prescription claims written by this provider, covering 58 Medicare beneficiaries and totaling roughly $28K in drug spend.
Internal Medicine Physician is a high-volume specialty nationwide, with 172,737 enrolled providers across 56 states and an average of 2,716 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 | 1326018730 |
|---|---|
| Specialty | Internal Medicine Physician |
| Credentials | MD FACP |
| Gender | Male |
| NPI Issued | 01/26/2006 |
Hospital and facility affiliations
Facilities where Michael Weisz, MD FACP 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.
Board OF Regents OF The University OF Oklahoma OU Physicians Tulsa
Tulsa, OK
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Michael Weisz, MD FACP. Source: openpaymentsdata.cms.gov.
Total received
$17
Largest payer
Fresenius USA Marketing, Inc.
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
194
Total Claims
$28K
Total Drug Cost
58
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 384
- Total Day Supply
- 10,929
- Generic Drug Cost
- $4K
Patient Demographics
- Average Patient Age
- 66.4 years
- Avg HCC Risk Score
- 1.62
- Gender Split
- 69% female / 31% male
- Age Distribution
- <65: 21, 65-74: 26, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Michael Weisz, MD FACP prescribes most
Top Medicare Part D drugs by claim count, 2023
- Losartan Potassium
Losartan Potassium
16 claims
- Amlodipine Besylate
Amlodipine Besylate
15 claims
- Valsartan
Valsartan
11 claims
| Drug | Claims |
|---|---|
| Losartan Potassium | 16 |
| Amlodipine Besylate | 15 |
| Valsartan | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Internal Medicine Physician Overview
How Michael Weisz, MD FACP fits within the Internal Medicine Physician landscape nationally.
172,737
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider
Michael Weisz, MD FACP's 194 claims are below the specialty average of 2,716.
Nearby Internal Medicine Physician Providers in Oklahoma
Other clinicians with the same primary specialty enrolled in Oklahoma, drawn from the same CMS NPPES roster as Weisz.
One of 1,313 Internal Medicine Physician providers enrolled in Oklahoma, 5 are shown here.
Abdelrahman Abdalla
Oklahoma City, OK
Dr. Al-Ola Abdallah
M.D
Tulsa, OK
Dr. Tony Abdo
M.D
Oklahoma City, OK
Dr. David Abernethy
M.D.
Oklahoma City, OK
Dr. Ahmed Abou Elmagd
MD
Fort Sill, OK
Compare Internal Medicine 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 Oklahoma medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Internal Medicine 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 Michael Weisz, MD FACP's specialty? ▼
Michael Weisz, MD FACP specializes in Internal Medicine Physician and practices in Tulsa, Oklahoma. Credentials: MD FACP.
How much does Michael Weisz, MD FACP prescribe under Medicare Part D? ▼
In 2023, Michael Weisz, MD FACP wrote 194 Medicare Part D claims totaling $28K in drug costs for 58 beneficiaries.
Where is Michael Weisz, MD FACP located? ▼
Michael Weisz, MD FACP is located at 4444 E 41ST ST, Tulsa, OK, 74135. Phone: (918) 619-4101.
What is Michael Weisz, MD FACP's NPI number? ▼
Michael Weisz, MD FACP's National Provider Identifier (NPI) is 1326018730, issued on 01/26/2006.
How many Internal Medicine Physician providers are there in the US? ▼
There are 172,737 Internal Medicine Physician providers across 56 states in the US. The average Internal Medicine Physician provider writes 2,716 Medicare Part D claims per year.
What drugs does Michael Weisz, MD FACP prescribe most often? ▼
Based on 2023 Medicare Part D data, Michael Weisz, MD FACP's most frequently prescribed drugs include Losartan Potassium, Amlodipine Besylate, Valsartan. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Michael Weisz, MD FACP accept Medicare? ▼
Michael Weisz, MD FACP appears in CMS Medicare data with 194 Part D claims and 58 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Michael Weisz, MD FACP's credentials? ▼
Michael Weisz, MD FACP's NPI is 1326018730 with credentials MD FACP. 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.