NPI registry status
Active
2026 NPPES data Otolaryngic Allergy Physician NPI 1518910272 MD
Verify on CMS → John McMahan, MD
Otolaryngic Allergy Physician in Appleton, 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 151 in Otolaryngic Allergy 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
1K
Medicare Part D claims · 241 beneficiaries · Otolaryngic Allergy Physician avg: 788
Generic prescribing
98%
generic claims · 2% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
63.8/100
▼ 19 pts below national avg 83.1 · Mid-tier
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
John McMahan, MD reported a CMS MIPS final score of 63.8/100 - below the 83.1 national average - and filed 1,004 Medicare Part D claims in 2023.
- 63.8/100
- MIPS score · -19 vs avg
- 1K
- Part D claims, 2023
- 98%
- generic prescribing
- Likely
- board-certified (heuristic)
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.
John McMahan, MD's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
64 6th percentile higher than 6% of 477,587 scored providers
Each bar is a band; taller bars hold more scored providers. 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 Merit-based Incentive Payment System (MIPS) · 2023
Where John McMahan, MD sits
This provider among otolaryngic allergy physician peers
Across the 63 otolaryngic allergy physician providers who report both Medicare Part D prescribing and a MIPS quality score, John McMahan, MD writes more Part D claims than 60% of them and scores higher on MIPS quality than 14% - placing this provider in the high-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Part D claim volume vs MIPS quality, by specialty percentile
Each dot is one otolaryngic allergy physician peer from a representative sample of 60; the gold marker is John McMahan, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
John McMahan, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting - 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 John McMahan, MD?
Below national averagePrimary specialty
Otolaryngic Allergy Physician
Medicare Part D claims
1,004 27% vs specialty avg
MIPS final score
63.8/100 19.3 pts vs avg
Specialty distribution in Wisconsin
How Otolaryngic Allergy Physician compares to other specialties among Wisconsin providers
Medicare quality performance, MIPS
John McMahan, MD's 2023 MIPS final score plotted against the Otolaryngic Allergy Physician national average
- MIPS Final Score
- 63.8/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Otolaryngic Allergy Physician) - 63.8/100 vs national avg 83.1
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).
John McMahan, MD appears in the CMS NPPES registry as an Otolaryngic Allergy Physician provider holding MD credentials at 247 S NICOLET RD, Appleton, WI, 54914, with a listed phone of (888) 938-3838. NPI 1518910272 was issued on 05/17/2006.
Medicare Part D records for calendar year 2023 show 1,004 prescription claims written by this provider, covering 241 Medicare beneficiaries and totaling roughly $31K in drug spend, split 2% brand-name and 98% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 63.8/100 for the 2023 performance year (Quality 55.9, Cost 32.6), compared with the national average of 83.1.
Otolaryngic Allergy Physician is a narrow specialty nationwide, with 151 enrolled providers across 38 states and an average of 788 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 | 1518910272 |
|---|---|
| Specialty | Otolaryngic Allergy Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 05/17/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
63.8038
Final Score
Avg: 83.1
55.9047
Quality
32.608
Cost
89
Promoting Interoperability
Reporting: Group practice
Brand vs generic prescribing mix · Generic-heavy
John McMahan, MD - brand share 2.0%
Otolaryngic Allergy Physician average
2% brand-name claims vs 98% generic, on 1,004 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.
1,004
Total Claims
$31K
Total Drug Cost
241
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,572
- Total Day Supply
- 38,921
- Brand vs Generic
- 2% brand / 98% generic
- Brand Drug Cost
- $4K
- Generic Drug Cost
- $27K
- Antibiotic Claims
- 169
Patient Demographics
- Average Patient Age
- 74.4 years
- Avg HCC Risk Score
- 0.95
- Gender Split
- 55% female / 45% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What John McMahan, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Montelukast Sodium
Montelukast Sodium
187 claims
- Omeprazole
Omeprazole
169 claims
- Prednisone
Prednisone
123 claims
- Fluticasone Propio…
Fluticasone Propionate
109 claims
- Azelastine Hcl
Azelastine Hcl
78 claims
- Cefdinir 56
Cefdinir
56 claims
- Amoxicillin-Clavul… 50
Amoxicillin-Clavulanate Potass
50 claims
- Pantoprazole Sodium 46
Pantoprazole Sodium
46 claims
| Drug | Claims |
|---|---|
| Montelukast Sodium | 187 |
| Omeprazole | 169 |
| Prednisone | 123 |
| Fluticasone Propionate | 109 |
| Azelastine Hcl | 78 |
| Cefdinir | 56 |
| Amoxicillin-Clavulanate Potass Amoxicillin/Potassium Clav | 50 |
| Pantoprazole Sodium | 46 |
| Ipratropium Bromide | 34 |
| Clindamycin Hcl | 27 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Otolaryngic Allergy Physician Overview
How John McMahan, MD fits within the Otolaryngic Allergy Physician landscape nationally.
151
Otolaryngic Allergy Physician Providers in US
38
States with Otolaryngic Allergy Physician
788
Avg Claims per Provider
John McMahan, MD's 1,004 claims are above the specialty average of 788.
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 Wisconsin medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Otolaryngic Allergy 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 John McMahan, MD's specialty? ▼
John McMahan, MD specializes in Otolaryngic Allergy Physician and practices in Appleton, Wisconsin. Credentials: MD.
How much does John McMahan, MD prescribe under Medicare Part D? ▼
In 2023, John McMahan, MD wrote 1,004 Medicare Part D claims totaling $31K in drug costs for 241 beneficiaries.
What is John McMahan, MD's Medicare quality score? ▼
John McMahan, MD has a CMS MIPS Final Score of 63.8/100 (Quality: 55.9, Cost: 32.6). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is John McMahan, MD located? ▼
John McMahan, MD is located at 247 S NICOLET RD, Appleton, WI, 54914. Phone: (888) 938-3838.
What is John McMahan, MD's NPI number? ▼
John McMahan, MD's National Provider Identifier (NPI) is 1518910272, issued on 05/17/2006.
Does John McMahan, MD prescribe more brand-name or generic drugs? ▼
John McMahan, MD's prescribing is 2% brand-name and 98% generic drugs by claim count, with $4K in brand drug costs.
How many Otolaryngic Allergy Physician providers are there in the US? ▼
There are 151 Otolaryngic Allergy Physician providers across 38 states in the US. The average Otolaryngic Allergy Physician provider writes 788 Medicare Part D claims per year.
What drugs does John McMahan, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, John McMahan, MD's most frequently prescribed drugs include Montelukast Sodium, Omeprazole, Prednisone. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does John McMahan, MD accept Medicare? ▼
John McMahan, MD appears in CMS Medicare data with 1,004 Part D claims and 241 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify John McMahan, MD's credentials? ▼
John McMahan, MD's NPI is 1518910272 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 (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- 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
Compiled from official public sources by the PlainDoctor editorial team.
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.