NPI registry status
Active
2026 NPPES data Pharmacist NPI 1104593581 PHARMD
Verify on CMS → Michael Weissmueller, PHARMD
Pharmacist in Phoenix, Arizona.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 291,043 in Pharmacist, 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
96
Medicare Part D claims · 90 beneficiaries · Pharmacist avg: 135
Generic prescribing
0%
generic claims · 100% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Michael Weissmueller, PHARMD filed 96 Medicare Part D claims in 2023 as a Pharmacist in Phoenix, Arizona, prescribing 0% generic.
- 96
- Part D claims, 2023
- 0%
- generic prescribing
- ≥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.
CMS NPPES provider registry desk
NPI 1104593581 · Pharmacist
NPI-10 · ENUM-RECENT · TAX-MEGA · RX-TRACE · BOOK-MID · PHOTO-ENUM
- NPI-10 1104593581
- ENUM-RECENT 2021
- TAX-MEGA 291K Pharmacist
- RX-TRACE 96
- BOOK-MID 6,898 in Arizona
- PHOTO-ENUM Maryam Mohamud · 2021
Michael Weissmueller, PHARMD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
96 ≥ 0th percentile 0% 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
What does the federal data show about Michael Weissmueller, PHARMD?
Quality data not reportedPrimary specialty
Pharmacist
Medicare Part D claims
96 29% vs specialty avg
Specialty distribution in Arizona
How Pharmacist compares to other specialties among Arizona 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 Pharmacist. 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 | 1104593581 |
|---|---|
| Specialty | Pharmacist |
| Credentials | PHARMD |
| Gender | Male |
| NPI Issued | 08/24/2021 |
Brand vs generic prescribing mix · Brand-heavy
Michael Weissmueller, PHARMD - brand share 100.0%
Pharmacist average
100% brand-name claims vs 0% generic, on 96 2023 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 2023.
96
Total Claims
$26K
Total Drug Cost
90
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 96
- Total Day Supply
- 96
- Brand vs Generic
- 100% brand / 0% generic
- Brand Drug Cost
- $26K
- Generic Drug Cost
- $0
Patient Demographics
- Average Patient Age
- 73.5 years
- Avg HCC Risk Score
- 1.30
- Gender Split
- 58% female / 42% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
| Drug | Claims |
|---|---|
| Shingrix Varicella-Zoster Ge/As01b/Pf | 45 |
| Abrysvo "Rsv Vacc | N/A |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Pharmacist Overview
How Michael Weissmueller, PHARMD fits within the Pharmacist landscape nationally.
291,043
Pharmacist Providers in US
56
States with Pharmacist
135
Avg Claims per Provider
Michael Weissmueller, PHARMD's 96 claims are below the specialty average of 135.
Nationwide Pharmacist peers with similar MIPS or enrollment year
Two federal-record peer sets for Weissmueller, both outside Arizona 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 Pharmacist Providers in Arizona
Other clinicians with the same primary specialty enrolled in Arizona, drawn from the same CMS NPPES roster as Weissmueller.
One of 6,898 Pharmacist providers enrolled in Arizona, 5 are shown here.
Dr. Rooney Aago
RPH
Phoenix, AZ
Maria Rosalie Abad
Lake Havasu City, AZ
Jesse Abah
Phoenix, AZ
Dr. Dustin Abaonza
PHARM D
Tuba City, AZ
Kristin Abaonza
Tuba City, AZ
Compare Pharmacist nationally: see state-by-state distribution →
Frequently Asked Questions
What is Michael Weissmueller, PHARMD's specialty? ▼
Michael Weissmueller, PHARMD specializes in Pharmacist and practices in Phoenix, Arizona. Credentials: PHARMD.
How much does Michael Weissmueller, PHARMD prescribe under Medicare Part D? ▼
In 2023, Michael Weissmueller, PHARMD wrote 96 Medicare Part D claims totaling $26K in drug costs for 90 beneficiaries.
Where is Michael Weissmueller, PHARMD located? ▼
Michael Weissmueller, PHARMD is located at 18460 N 7TH ST, Phoenix, AZ, 85022. Phone: (602) 993-5781.
What is Michael Weissmueller, PHARMD's NPI number? ▼
Michael Weissmueller, PHARMD's National Provider Identifier (NPI) is 1104593581, issued on 08/24/2021.
Does Michael Weissmueller, PHARMD prescribe more brand-name or generic drugs? ▼
Michael Weissmueller, PHARMD's prescribing is 100% brand-name and 0% generic drugs by claim count, with $26K in brand drug costs.
How many Pharmacist providers are there in the US? ▼
There are 291,043 Pharmacist providers across 56 states in the US. The average Pharmacist provider writes 135 Medicare Part D claims per year.
What drugs does Michael Weissmueller, PHARMD prescribe most often? ▼
Based on 2023 Medicare Part D data, Michael Weissmueller, PHARMD's most frequently prescribed drugs include Shingrix, Abrysvo. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Michael Weissmueller, PHARMD accept Medicare? ▼
Michael Weissmueller, PHARMD appears in CMS Medicare data with 96 Part D claims and 90 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Michael Weissmueller, PHARMD's credentials? ▼
Michael Weissmueller, PHARMD's NPI is 1104593581 with credentials PHARMD. 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.