Mark Lonergan, D.M.D.
NPI 1952384521 · Oral and Maxillofacial Surgery (Dentist) · Holland, MI
Mark Lonergan, D.M.D. is a Oral and Maxillofacial Surgery (Dentist) provider in Holland, MI (NPI 1952384521).
Provider details
- NPI number
- 1952384521
- Entity type
- Individual
- Primary specialty
- Oral and Maxillofacial Surgery (Dentist)Dental Providers
- Credential
- D.M.D.
- Sex
- Male
- License
- 2901016242 (PA)
Specialties & taxonomies
Dental Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 5 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Chlorhexidine Gluconate | 149 | 113 |
| Amoxicillin | 144 | 115 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 92 | 85 |
| Acetaminophen With Codeinebrand: Acetaminophen-Codeine | 19 | 19 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 16 | 11 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-11-28
- Last updated
- 2007-07-09
Frequently asked questions
- What is Mark Lonergan's NPI number?
- Mark Lonergan's National Provider Identifier (NPI) is 1952384521, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Lonergan's specialty?
- Mark Lonergan is listed in the NPPES registry with a primary specialty of Oral and Maxillofacial Surgery (Dentist) (Dental Providers).
- Where is Mark Lonergan located?
- Mark Lonergan's practice location on file with NPPES is 601 Michigan Ave, Holland, MI 49423-4951.
- What is Mark Lonergan's phone number?
- The practice phone number listed in the NPPES registry for Mark Lonergan is (616) 392-2329.
- Is Mark Lonergan's NPI active?
- Yes — Mark Lonergan's NPI (1952384521) is active in the NPPES registry as of the last update on 2007-07-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.