Harold Van Lonkhuyzen, MD
NPI 1568576403 · Psychiatry Physician · Rockland, ME
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Harold Van Lonkhuyzen, MD is a Psychiatry Physician provider in Rockland, ME (NPI 1568576403).
Provider details
- NPI number
- 1568576403
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 015641 (ME)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
164 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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 does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 147 | $125 |
| Psychiatric Diagnostic Evaluation With Medical Services90792 | 17 | $171 |
Typical Medicare-allowed amounts for these services range $125–$171 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 37 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Quetiapine Fumarate | 173 | 19 |
| Sertraline Hcl | 150 | 18 |
| Lamotrigine | 132 | 19 |
| Risperidone | 107 | — |
| Venlafaxine Hclbrand: Venlafaxine Hcl Er | 102 | 12 |
| Trazodone Hcl | 84 | 11 |
| Buspirone Hcl | 77 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-18
- Last updated
- 2010-11-04
Frequently asked questions
- What is Harold Van Lonkhuyzen's NPI number?
- Harold Van Lonkhuyzen's National Provider Identifier (NPI) is 1568576403, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Harold Van Lonkhuyzen's specialty?
- Harold Van Lonkhuyzen is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Harold Van Lonkhuyzen located?
- Harold Van Lonkhuyzen's practice location on file with NPPES is 12 Union Street, Rockland, ME 04841-2739.
- What is Harold Van Lonkhuyzen's phone number?
- The practice phone number listed in the NPPES registry for Harold Van Lonkhuyzen is (207) 701-4402.
- Does Harold Van Lonkhuyzen accept Medicare?
- Harold Van Lonkhuyzen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Harold Van Lonkhuyzen's NPI active?
- Yes — Harold Van Lonkhuyzen's NPI (1568576403) is active in the NPPES registry as of the last update on 2010-11-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.