Mark Walker, M.D
NPI 1427318864 · Psychiatry Physician · Palm Beach, FL
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Walker, M.D is a Psychiatry Physician provider in Palm Beach, FL (NPI 1427318864).
Provider details
- NPI number
- 1427318864
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D
- Sex
- Male
- Sole proprietor
- Yes
- License
- ME108732 (FL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
14 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 · 12 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Duloxetine Hcl | 49 |
| Alprazolam | 38 |
| Clonazepam | 25 |
| Aripiprazole | 24 |
| Lorazepam | 23 |
| Diazepam | 17 |
| Buspirone Hcl | 15 |
| Mirtazapine | 14 |
| Trazodone Hcl | 14 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2012-05-19
- Last updated
- 2025-06-21
- Certified
- 2025-06-21
Frequently asked questions
- What is Mark Walker's NPI number?
- Mark Walker's National Provider Identifier (NPI) is 1427318864, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Walker's specialty?
- Mark Walker is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Walker located?
- Mark Walker's practice location on file with NPPES is 234 Oleander Ave Apt 6, Palm Beach, FL 33480-3824.
- What is Mark Walker's phone number?
- The practice phone number listed in the NPPES registry for Mark Walker is (352) 497-5920.
- Does Mark Walker accept Medicare?
- Mark Walker is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Walker's NPI active?
- Yes — Mark Walker's NPI (1427318864) is active in the NPPES registry as of the last update on 2025-06-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.