NPI registry status
Active
2026 NPPES data Oral and Maxillofacial Surgery (Dentist) NPI 1952384521 D.M.D.
Verify on CMS → Mark Lonergan, D.M.D.
Oral and Maxillofacial Surgery (Dentist) in Holland, Michigan.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 7,769 in Oral and Maxillofacial Surgery (Dentist), 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
448
Medicare Part D claims · 189 beneficiaries · Oral and Maxillofacial Surgery (Dentist) avg: 407
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Mark Lonergan, D.M.D. filed 448 Medicare Part D claims in 2024 as an Oral and Maxillofacial Surgery (Dentist) in Holland, Michigan.
- 448
- Part D claims, 2024
- ≥61st
- 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.
Federal trust snapshot
What official records show about Mark Lonergan, D.M.D.
Bare NPI registry listing — limited federal enrichment beyond basic enumeration. Verify all credentials with official sources.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1952384521), first enumerated 11/28/2005.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 448 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- State context
State board disciplinary context
Michigan statewide board action statistics are published annually — these figures describe aggregate state activity, not Mark Lonergan, D.M.D.'s individual license status. Verify directly with the state medical board.
Source: MI-BOM annual report 2023
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
Compare Lonergan with other Oral and Maxillofacial Surgery (Dentist) providers
Same primary specialty, same federal CMS NPPES roster.
Also enrolled in Michigan
- Dr. Zaid Abu-Seir, DDS Warren, MI
- Dr. Andrew Afshar, DDS, MD Midland, MI
- Dr. Eyal Akerman, D.M.D, M.SC Ann Arbor, MI
- Dr. Ali Al-Sammak, DMD Chesterfield, MI
- Dr. Ihab Alamat, MD, DDS Shelby Township, MI
- Dr. David Aldrich, D.D.S. Plymouth, MI
Other specialties in Holland: Clinical Social Worker (247) · Behavior Technician (203) · Social Worker (118) · Physical Therapist (84)
CMS NPPES provider registry desk
NPI 1952384521 · Oral and Maxillofacial Surgery (Dentist)
NPI-10 · ENUM-LEGACY · TAX-MID · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1952384521
- ENUM-LEGACY 2005
- TAX-MID 8K Oral and
- RX-LIGHT 448
- BOOK-THIN 214 in Michigan
- PHOTO-ENUM Marc Hertz, D.D.S. · 2005
Mark Lonergan, D.M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
448 ≥ 61st percentile 61% of 1,416,883 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 · 2024
What does the federal data show about Mark Lonergan, D.M.D.?
Quality data not reportedPrimary specialty
Oral and Maxillofacial Surgery (Dentist)
Medicare Part D claims
448 10% vs specialty avg
Specialty distribution in Michigan
How Oral and Maxillofacial Surgery (Dentist) compares to other specialties among Michigan 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 Oral and Maxillofacial Surgery (Dentist). 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 | 1952384521 |
|---|---|
| Specialty | Oral and Maxillofacial Surgery (Dentist) |
| Credentials | D.M.D. |
| Gender | Male |
| NPI Issued | 11/28/2005 |
License & disciplinary context - Michigan MI-BOM 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~41K Michigan medical licensees in 2023 - they are NOT specific to Mark Lonergan, D.M.D.. To verify Mark Lonergan, D.M.D.'s current license status, search the MI-BOM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
123
Total board actions, Michigan 2023
Across 120 cases
3.00
Actions per 1,000 licensees
Michigan statewide rate
probation
Most common action type
44 cases
MI-BOM publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Michigan disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2024.
448
Total Claims
$2K
Total Drug Cost
189
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 452.5
- Total Day Supply
- 3,896
- Brand Drug Cost
- $0
- Generic Drug Cost
- $2K
- Opioid Claims
- 114 (25.4% rate)
- Antibiotic Claims
- 174
Patient Demographics
- Average Patient Age
- 73.8 years
- Avg HCC Risk Score
- 0.95
- Gender Split
- 50% female / 50% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Mark Lonergan, D.M.D. prescribes most
Top Medicare Part D drugs by claim count, 2024
- Chlorhexidine Gluc…
Chlorhexidine Gluconate
149 claims
- Amoxicillin
Amoxicillin
144 claims
- Hydrocodone-Acetam…
Hydrocodone-Acetaminophen
92 claims
- Acetaminophen-Code… 19
Acetaminophen-Codeine
19 claims
- Amoxicillin-Clavul… 16
Amoxicillin-Clavulanate Potass
16 claims
| Drug | Claims |
|---|---|
| Chlorhexidine Gluconate | 149 |
| Amoxicillin | 144 |
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 92 |
| Acetaminophen-Codeine Acetaminophen With Codeine | 19 |
| Amoxicillin-Clavulanate Potass Amoxicillin/Potassium Clav | 16 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Oral and Maxillofacial Surgery (Dentist) in MI →
All providers in Michigan →
Compare specialties →
Oral and Maxillofacial Surgery (Dentist) Overview
How Mark Lonergan, D.M.D. fits within the Oral and Maxillofacial Surgery (Dentist) landscape nationally.
7,769
Oral and Maxillofacial Surgery (Dentist) Providers in US
52
States with Oral and Maxillofacial Surgery (Dentist)
407
Avg Claims per Provider
Mark Lonergan, D.M.D.'s 448 claims are above the specialty average of 407.
Nationwide Oral and Maxillofacial Surgery (Dentist) peers with similar MIPS or enrollment year
Two federal-record peer sets for Lonergan, both outside Michigan so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2005)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Oral and Maxillofacial Surgery (Dentist) Providers in Michigan
Other clinicians with the same primary specialty enrolled in Michigan, drawn from the same CMS NPPES roster as Lonergan.
One of 214 Oral and Maxillofacial Surgery (Dentist) providers enrolled in Michigan, 11 are shown on this page.
Shadi Alzahrani
BDS
Ann Arbor, MI
Dr. Jonathon Anderson
DDS
Birmingham, MI
Dr. Alejandro Arango
DDS
Wyandotte, MI
Dr. Jerrold Armstrong
DDS
Detroit, MI
Dr. Sharon Aronovich
D.M.D.
Ann Arbor, MI
Compare Oral and Maxillofacial Surgery (Dentist) nationally: see state-by-state distribution →
Frequently Asked Questions
What is Mark Lonergan, D.M.D.'s specialty? ▼
Mark Lonergan, D.M.D. specializes in Oral and Maxillofacial Surgery (Dentist) and practices in Holland, Michigan. Credentials: D.M.D..
How much does Mark Lonergan, D.M.D. prescribe under Medicare Part D? ▼
In 2024, Mark Lonergan, D.M.D. wrote 448 Medicare Part D claims totaling $2K in drug costs for 189 beneficiaries.
Where is Mark Lonergan, D.M.D. located? ▼
Mark Lonergan, D.M.D. is located at 601 MICHIGAN AVE, Holland, MI, 49423. Phone: (616) 392-2329.
What is Mark Lonergan, D.M.D.'s NPI number? ▼
Mark Lonergan, D.M.D.'s National Provider Identifier (NPI) is 1952384521, issued on 11/28/2005.
Does Mark Lonergan, D.M.D. prescribe opioids? ▼
Yes, Mark Lonergan, D.M.D. had 114 opioid claims in 2024 with an opioid prescribing rate of 25.4%.
How many Oral and Maxillofacial Surgery (Dentist) providers are there in the US? ▼
There are 7,769 Oral and Maxillofacial Surgery (Dentist) providers across 52 states in the US. The average Oral and Maxillofacial Surgery (Dentist) provider writes 407 Medicare Part D claims per year.
What drugs does Mark Lonergan, D.M.D. prescribe most often? ▼
Based on 2024 Medicare Part D data, Mark Lonergan, D.M.D.'s most frequently prescribed drugs include Chlorhexidine Gluconate, Amoxicillin, Hydrocodone-Acetaminophen. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Mark Lonergan, D.M.D. accept Medicare? ▼
Mark Lonergan, D.M.D. appears in CMS Medicare data with 448 Part D claims and 189 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Mark Lonergan, D.M.D.'s credentials? ▼
Mark Lonergan, D.M.D.'s NPI is 1952384521 with credentials D.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 (2024). 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 August 2026 (NPPES) / 2024 (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 August 2026.