David M. Holtzman, MD
NPI 1972521789ActiveIndividual· Psychiatry & Neurology, Neurology· Saint Louis, MO
Psychiatry & Neurology, Neurology (MD) in Saint Louis, Missouri, trained at Northwestern University Feinberg Medical School (class of 1985). 33 Medicare patients in 2024, $5,361 paid; all of their 103 Part D prescriptions were generic. C2n Diagnostics, LLC was the largest of 3 companies reporting payments in 2025, $65,436 in all, mostly speaking and faculty fees.
Overview
| NPI | 1972521789 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jul 18, 2006 |
| Last updated in NPPES | Apr 17, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Psychiatry & Neurology, Neurology Primary | 2084N0400X | 107434 | MO |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Neurology (MO) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 33 |
|---|---|
| Services billed | 71 across 5 procedure codes |
| Paid by Medicare | $5,361 |
Part D prescriptions in 2024
| Prescriptions (claims) | 103 · 211 30-day fills |
|---|---|
| Patients | 26 |
| Total drug cost | $1,741 |
| Generic share | 100% of claims |
Education and affiliations
| Medical school | Northwestern University Feinberg Medical School |
|---|---|
| Graduation year | 1985 |
| Medicare specialty | Neurology |
Medical group
- Washington UniversitySaint Louis, MO · 3,029 clinicians
Hospital affiliation
- Barnes Jewish HospitalSaint Louis, MO
Industry payments (Open Payments)
- 2025$65,436 · 8 payments from 3 companies
- 2024$31,691 · 14 payments from 6 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| C2n Diagnostics, LLC | $40,000 | 4 |
| Genentech, Inc. | $22,436 | 3 |
| Pfizer Inc. | $3,000 | 1 |
What the 2025 payments were for
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$40,000 · 4 payments
- Consulting Fee$25,000 · 3 payments
- Travel and Lodging$436.37 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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