NPI registry status
Active
2026 NPPES data Addiction Psychiatry Physician NPI 1790950772 DO
Verify on CMS → Michael Shairs, DO
Addiction Psychiatry Physician in Keene, 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 666 in Addiction Psychiatry 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
639
Medicare Part D claims · 121 beneficiaries · Addiction Psychiatry Physician avg: 792
Generic prescribing
94%
generic claims · 6% brand-name · higher generic rates reduce patient out-of-pocket costs
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
Michael Shairs, DO filed 639 Medicare Part D claims in 2023 as a Addiction Psychiatry Physician in Keene, New Hampshire, prescribing 94% generic.
- 639
- Part D claims, 2023
- 94%
- 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.
Michael Shairs, DO's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
639 Top 31% higher than 69% 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 certification likely (heuristic, not verified)
Michael Shairs, DO 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 Shairs, DO?
Quality data not reportedPrimary specialty
Addiction Psychiatry Physician
Medicare Part D claims
639 19% vs specialty avg
Specialty distribution in New Hampshire
How Addiction Psychiatry Physician compares to other specialties among New Hampshire 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 Addiction Psychiatry 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 Shairs, DO appears in the CMS NPPES registry as an Addiction Psychiatry Physician provider holding DO credentials at 17 93RD ST, Keene, NH, 03431, with a listed phone of (603) 357-4400. NPI 1790950772 was issued on 04/29/2008.
Medicare Part D records for calendar year 2023 show 639 prescription claims written by this provider, covering 121 Medicare beneficiaries and totaling roughly $66K in drug spend, split 6% brand-name and 94% generic by claim count.
Addiction Psychiatry Physician is a narrow specialty nationwide, with 666 enrolled providers across 49 states and an average of 792 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 | 1790950772 |
|---|---|
| Specialty | Addiction Psychiatry Physician |
| Credentials | DO |
| Gender | Male |
| NPI Issued | 04/29/2008 |
Hospital and facility affiliations
Facilities where Michael Shairs, DO 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.
Atrius Health Inc
Chelmsford, MA
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Brand vs generic prescribing mix · Generic-heavy
Michael Shairs, DO - brand share 6.0%
Addiction Psychiatry Physician average
6% brand-name claims vs 94% generic, on 639 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.
639
Total Claims
$66K
Total Drug Cost
121
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 741
- Total Day Supply
- 19,797
- Brand vs Generic
- 6% brand / 94% generic
- Brand Drug Cost
- $45K
- Generic Drug Cost
- $20K
Patient Demographics
- Average Patient Age
- 59.8 years
- Avg HCC Risk Score
- 1.48
- Gender Split
- 57% female / 43% male
- Age Distribution
- <65: 71, 65-74: 39, 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 Shairs, DO prescribes most
Top Medicare Part D drugs by claim count, 2023
- Clonazepam
Clonazepam
54 claims
- Fluoxetine Hcl
Fluoxetine Hcl
37 claims
- Venlafaxine Hcl Er
Venlafaxine Hcl Er
32 claims
- Mirtazapine
Mirtazapine
29 claims
- Trazodone Hcl
Trazodone Hcl
29 claims
- Aripiprazole
Aripiprazole
26 claims
- Dextroamphetamine-…
Dextroamphetamine-Amphetamine
26 claims
- Quetiapine Fumarate
Quetiapine Fumarate
24 claims
| Drug | Claims |
|---|---|
| Clonazepam | 54 |
| Fluoxetine Hcl | 37 |
| Venlafaxine Hcl Er Venlafaxine Hcl | 32 |
| Mirtazapine | 29 |
| Trazodone Hcl | 29 |
| Aripiprazole | 26 |
| Dextroamphetamine-Amphetamine Dextroamphetamine/Amphetamine | 26 |
| Quetiapine Fumarate | 24 |
| Sertraline Hcl | 23 |
| Lamotrigine | 17 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Addiction Psychiatry Physician Overview
How Michael Shairs, DO fits within the Addiction Psychiatry Physician landscape nationally.
666
Addiction Psychiatry Physician Providers in US
49
States with Addiction Psychiatry Physician
792
Avg Claims per Provider
Michael Shairs, DO's 639 claims are below the specialty average of 792.
Nearby Addiction Psychiatry Physician Providers in New Hampshire
Other clinicians with the same primary specialty enrolled in New Hampshire, drawn from the same CMS NPPES roster as Shairs.
Dr. Luke Archibald
M.D.
Lebanon, NH
Dr. Bryan Hybki
MD
Lebanon, NH
Dr. William Levitt
M.D.
Manchester, NH
Dr. Corneliu Stanciu
MD, MRO, FASAM
Manchester, NH
Compare Addiction Psychiatry 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 Addiction Psychiatry 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 Shairs, DO's specialty? ▼
Michael Shairs, DO specializes in Addiction Psychiatry Physician and practices in Keene, New Hampshire. Credentials: DO.
How much does Michael Shairs, DO prescribe under Medicare Part D? ▼
In 2023, Michael Shairs, DO wrote 639 Medicare Part D claims totaling $66K in drug costs for 121 beneficiaries.
Where is Michael Shairs, DO located? ▼
Michael Shairs, DO is located at 17 93RD ST, Keene, NH, 03431. Phone: (603) 357-4400.
What is Michael Shairs, DO's NPI number? ▼
Michael Shairs, DO's National Provider Identifier (NPI) is 1790950772, issued on 04/29/2008.
Does Michael Shairs, DO prescribe more brand-name or generic drugs? ▼
Michael Shairs, DO's prescribing is 6% brand-name and 94% generic drugs by claim count, with $45K in brand drug costs.
How many Addiction Psychiatry Physician providers are there in the US? ▼
There are 666 Addiction Psychiatry Physician providers across 49 states in the US. The average Addiction Psychiatry Physician provider writes 792 Medicare Part D claims per year.
What drugs does Michael Shairs, DO prescribe most often? ▼
Based on 2023 Medicare Part D data, Michael Shairs, DO's most frequently prescribed drugs include Clonazepam, Fluoxetine Hcl, Venlafaxine Hcl Er. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Michael Shairs, DO accept Medicare? ▼
Michael Shairs, DO appears in CMS Medicare data with 639 Part D claims and 121 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Michael Shairs, DO's credentials? ▼
Michael Shairs, DO's NPI is 1790950772 with credentials DO. 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
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.