NPI registry status
Active
2026 NPPES data Pulmonary Disease Physician NPI 1518075159 M.D.
Verify on CMS → Donald Mahler, M.D.
Pulmonary Disease Physician in Lebanon, New Hampshire.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 9,271 in Pulmonary Disease 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
919
Medicare Part D claims · 128 beneficiaries · Pulmonary Disease Physician avg: 1K
Generic prescribing
20%
generic claims · 80% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
73.1/100
▼ 10 pts below national avg 83.1 · Mid-tier
Industry payments
$13.1K
14 payments · CMS Open Payments (Sunshine Act)
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
Donald Mahler, M.D. reported a CMS MIPS final score of 73.1/100 - below the 83.1 national average - and filed 919 Medicare Part D claims in 2023.
- 73.1/100
- MIPS score · -10 vs avg
- 919
- Part D claims, 2023
- 20%
- 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.
Donald Mahler, M.D.'s MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
73 11th percentile higher than 11% 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 Donald Mahler, M.D. sits
This provider among pulmonary disease physician peers
Across the 2,676 pulmonary disease physician providers who report both Medicare Part D prescribing and a MIPS quality score, Donald Mahler, M.D. writes more Part D claims than 45% of them and scores higher on MIPS quality than 13% - placing this provider in the lower-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 pulmonary disease physician peer from a representative sample of 60; the gold marker is Donald Mahler, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Donald Mahler, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 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 Donald Mahler, M.D.?
Below national averagePrimary specialty
Pulmonary Disease Physician
Medicare Part D claims
919 37% vs specialty avg
MIPS final score
73.1/100 10 pts vs avg
Specialty distribution in New Hampshire
How Pulmonary Disease Physician compares to other specialties among New Hampshire providers
Medicare quality performance, MIPS
Donald Mahler, M.D.'s 2023 MIPS final score plotted against the Pulmonary Disease Physician national average
- MIPS Final Score
- 73.1/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Pulmonary Disease Physician) - 73.1/100 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).
Donald Mahler, M.D. appears in the CMS NPPES registry as a Pulmonary Disease Physician provider holding M.D. credentials at 1 MEDICAL CENTER DR, Lebanon, NH, 03756, with a listed phone of (603) 650-5533. NPI 1518075159 was issued on 08/25/2006.
Medicare Part D records for calendar year 2023 show 919 prescription claims written by this provider, covering 128 Medicare beneficiaries and totaling roughly $851K in drug spend, split 80% brand-name and 20% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 73.1/100 for the 2023 performance year (Quality 60, Cost 47), compared with the national average of 83.1.
Pulmonary Disease Physician is a mid-sized specialty nationwide, with 9,271 enrolled providers across 53 states and an average of 1,457 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 | 1518075159 |
|---|---|
| Specialty | Pulmonary Disease Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 08/25/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
73.1117
Final Score
Avg: 83.1
60.0487
Quality
47.047
Cost
91
Promoting Interoperability
Reporting: Group practice
Hospital and facility affiliations
Facilities where Donald Mahler, M.D. 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.
Valley Regional Hospital Inc
Claremont, NH
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 Donald Mahler, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$13.1K
Largest payer
Mylan Specialty L.P.
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.
Brand vs generic prescribing mix · Brand-heavy
Donald Mahler, M.D. - brand share 80.0%
Pulmonary Disease Physician average
80% brand-name claims vs 20% generic, on 919 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.
919
Total Claims
$851K
Total Drug Cost
128
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,040
- Total Day Supply
- 29,460
- Brand vs Generic
- 80% brand / 20% generic
- Brand Drug Cost
- $846K
- Generic Drug Cost
- $6K
- Antibiotic Claims
- 20
Patient Demographics
- Average Patient Age
- 69.6 years
- Avg HCC Risk Score
- 1.20
- Gender Split
- 62% female / 38% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Donald Mahler, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Stiolto Respimat
Stiolto Respimat
200 claims
- Anoro Ellipta
Anoro Ellipta
129 claims
- Albuterol Sulfate …
Albuterol Sulfate Hfa
99 claims
- Spiriva Respimat 55
Spiriva Respimat
55 claims
- Trelegy Ellipta 55
Trelegy Ellipta
55 claims
- Prednisone 52
Prednisone
52 claims
- Breo Ellipta 40
Breo Ellipta
40 claims
- Bevespi Aerosphere 39
Bevespi Aerosphere
39 claims
| Drug | Claims |
|---|---|
| Stiolto Respimat Tiotropium Br/Olodaterol Hcl | 200 |
| Anoro Ellipta Umeclidinium Brm/Vilanterol Tr | 129 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 99 |
| Spiriva Respimat Tiotropium Bromide | 55 |
| Trelegy Ellipta Fluticasone/Umeclidin/Vilanter | 55 |
| Prednisone | 52 |
| Breo Ellipta Fluticasone/Vilanterol | 40 |
| Bevespi Aerosphere Glycopyrrolate/Formoterol Fum | 39 |
| Prolastin C Alpha-1-Proteinase Inhibitor | 28 |
| Breztri Aerosphere Budesonide/Glycopyr/Formoterol | 27 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Pulmonary Disease Physician Overview
How Donald Mahler, M.D. fits within the Pulmonary Disease Physician landscape nationally.
9,271
Pulmonary Disease Physician Providers in US
53
States with Pulmonary Disease Physician
1,457
Avg Claims per Provider
Donald Mahler, M.D.'s 919 claims are below the specialty average of 1,457.
Nearby Pulmonary Disease Physician Providers in New Hampshire
Other clinicians with the same primary specialty enrolled in New Hampshire, drawn from the same CMS NPPES roster as Mahler.
Dr. Fady Abou Rizk
MD
Laconia, NH
Dr. D. Akey
MD
Concord, NH
Dr. Ali Al-Alwan
MD
Dover, NH
Dr. Daniel Aridgides
M.D. PH.D.
Lebanon, NH
Dr. Graham Atkins
MD
Lebanon, NH
Compare Pulmonary Disease 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 New Hampshire medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Pulmonary Disease 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 Donald Mahler, M.D.'s specialty? ▼
Donald Mahler, M.D. specializes in Pulmonary Disease Physician and practices in Lebanon, New Hampshire. Credentials: M.D..
How much does Donald Mahler, M.D. prescribe under Medicare Part D? ▼
In 2023, Donald Mahler, M.D. wrote 919 Medicare Part D claims totaling $851K in drug costs for 128 beneficiaries.
What is Donald Mahler, M.D.'s Medicare quality score? ▼
Donald Mahler, M.D. has a CMS MIPS Final Score of 73.1/100 (Quality: 60, Cost: 47). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Donald Mahler, M.D. located? ▼
Donald Mahler, M.D. is located at 1 MEDICAL CENTER DR, Lebanon, NH, 03756. Phone: (603) 650-5533.
What is Donald Mahler, M.D.'s NPI number? ▼
Donald Mahler, M.D.'s National Provider Identifier (NPI) is 1518075159, issued on 08/25/2006.
Does Donald Mahler, M.D. prescribe more brand-name or generic drugs? ▼
Donald Mahler, M.D.'s prescribing is 80% brand-name and 20% generic drugs by claim count, with $846K in brand drug costs.
How many Pulmonary Disease Physician providers are there in the US? ▼
There are 9,271 Pulmonary Disease Physician providers across 53 states in the US. The average Pulmonary Disease Physician provider writes 1,457 Medicare Part D claims per year.
What drugs does Donald Mahler, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Donald Mahler, M.D.'s most frequently prescribed drugs include Stiolto Respimat, Anoro Ellipta, Albuterol Sulfate Hfa. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Donald Mahler, M.D. accept Medicare? ▼
Donald Mahler, M.D. appears in CMS Medicare data with 919 Part D claims and 128 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Donald Mahler, M.D.'s credentials? ▼
Donald Mahler, M.D.'s NPI is 1518075159 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.
- 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.