James Hartzler, DO
NPI 1992142699 · Psychiatry Physician · Grand Rapids, MI
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
James Hartzler, DO is a Psychiatry Physician provider in Grand Rapids, MI (NPI 1992142699).
Provider details
- NPI number
- 1992142699
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- 5101020610 (MI)
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
13 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
205 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 | 120 | $111 |
| Psychotherapy With Evaluation and Management Visit, 30 Minutes90833 | 85 | $66 |
Typical Medicare-allowed amounts for these services range $66–$111 (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 · 41 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Clonazepam | 172 | 20 |
| Buspirone Hcl | 101 | 18 |
| Dextroamphetamine/Amphetaminebrand: Dextroamphetamine-Amphetamine | 100 | — |
| Bupropion Hclbrand: Bupropion Xl | 92 | 17 |
| Mirtazapine | 91 | 18 |
| Aripiprazole | 75 | 19 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2013-06-04
- Last updated
- 2021-03-17
- Certified
- 2021-03-17
Frequently asked questions
- What is James Hartzler's NPI number?
- James Hartzler's National Provider Identifier (NPI) is 1992142699, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is James Hartzler's specialty?
- James Hartzler is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is James Hartzler located?
- James Hartzler's practice location on file with NPPES is 75 Sheldon Ave Se Fl 2, Grand Rapids, MI 49503-4224.
- What is James Hartzler's phone number?
- The practice phone number listed in the NPPES registry for James Hartzler is (616) 447-5820.
- Does James Hartzler accept Medicare?
- James Hartzler is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is James Hartzler's NPI active?
- Yes — James Hartzler's NPI (1992142699) is active in the NPPES registry as of the last update on 2021-03-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.