NPI registry status
Active
2026 NPPES data Endodontics NPI 1861594913 DMD
Verify on CMS → Michael Marshall, DMD
Endodontics in Manchester, 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 5,873 in Endodontics, 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
32
Medicare Part D claims · 30 beneficiaries · Endodontics avg: 116
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Michael Marshall, DMD filed 32 Medicare Part D claims in 2023 as a Endodontics in Manchester, New Hampshire.
- 32
- Part D claims, 2023
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 Marshall, DMD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
32 0th percentile higher than 0% 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
What does the federal data show about Michael Marshall, DMD?
Quality data not reportedPrimary specialty
Endodontics
Medicare Part D claims
32 72% vs specialty avg
Specialty distribution in New Hampshire
How Endodontics 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 Endodontics. 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 Marshall, DMD appears in the CMS NPPES registry as an Endodontics provider holding DMD credentials at 765 S MAIN ST STE 301, Manchester, NH, 03102, with a listed phone of (603) 624-9786. NPI 1861594913 was issued on 09/01/2006.
Medicare Part D records for calendar year 2023 show 32 prescription claims written by this provider, covering 30 Medicare beneficiaries and totaling roughly $150 in drug spend.
Endodontics is a mid-sized specialty nationwide, with 5,873 enrolled providers across 53 states and an average of 116 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 | 1861594913 |
|---|---|
| Specialty | Endodontics |
| Credentials | DMD |
| Gender | Male |
| NPI Issued | 09/01/2006 |
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
32
Total Claims
$150
Total Drug Cost
30
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 32
- Total Day Supply
- 278
- Generic Drug Cost
- $134
- Antibiotic Claims
- 29
Patient Demographics
- Average Patient Age
- 72.6 years
- Avg HCC Risk Score
- 0.71
- Gender Split
- 57% female / 43% 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 |
|---|---|
| Penicillin V Potassium | 19 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Endodontics Overview
How Michael Marshall, DMD fits within the Endodontics landscape nationally.
5,873
Endodontics Providers in US
53
States with Endodontics
116
Avg Claims per Provider
Michael Marshall, DMD's 32 claims are below the specialty average of 116.
Nearby Endodontics Providers in New Hampshire
Other clinicians with the same primary specialty enrolled in New Hampshire, drawn from the same CMS NPPES roster as Marshall.
Dr. Fereidoun Agha-Razi
DMD
Merrimack, NH
Dr. Aneesa Al-Khalidi
DMD
Nashua, NH
Dr. Gagan Dhaliwal
DMD
Londonderry, NH
Dr. John Diune
D.D.S.
Nashua, NH
Dr. Rachel Forbes
DMD
Dover, NH
Compare Endodontics 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 Endodontics 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.
Healthcare Guides
Learn more about finding, verifying, and understanding healthcare providers.
How to Find a Doctor
Step-by-step guide to choosing a provider
Verify Credentials
Check NPI, board certification & license status
Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore New Hampshire
Frequently Asked Questions
What is Michael Marshall, DMD's specialty? ▼
Michael Marshall, DMD specializes in Endodontics and practices in Manchester, New Hampshire. Credentials: DMD.
How much does Michael Marshall, DMD prescribe under Medicare Part D? ▼
In 2023, Michael Marshall, DMD wrote 32 Medicare Part D claims totaling $150 in drug costs for 30 beneficiaries.
Where is Michael Marshall, DMD located? ▼
Michael Marshall, DMD is located at 765 S MAIN ST STE 301, Manchester, NH, 03102. Phone: (603) 624-9786.
What is Michael Marshall, DMD's NPI number? ▼
Michael Marshall, DMD's National Provider Identifier (NPI) is 1861594913, issued on 09/01/2006.
How many Endodontics providers are there in the US? ▼
There are 5,873 Endodontics providers across 53 states in the US. The average Endodontics provider writes 116 Medicare Part D claims per year.
What drugs does Michael Marshall, DMD prescribe most often? ▼
Based on 2023 Medicare Part D data, Michael Marshall, DMD's most frequently prescribed drugs include Penicillin V Potassium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Michael Marshall, DMD accept Medicare? ▼
Michael Marshall, DMD appears in CMS Medicare data with 32 Part D claims and 30 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Michael Marshall, DMD's credentials? ▼
Michael Marshall, DMD's NPI is 1861594913 with credentials DMD. 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.