William Walkup, MD
NPI 1386619948 · Psychiatry Physician · Columbia, SC
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Walkup, MD is a Psychiatry Physician provider in Columbia, SC (NPI 1386619948).
Provider details
- NPI number
- 1386619948
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 16261 (SC)
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
20 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
595 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 | 524 | $117 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 28 | $82 |
| Psychotherapy With Evaluation and Management Visit, 30 Minutes90833 | 24 | $66 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 19 | $150 |
Typical Medicare-allowed amounts for these services range $66–$150 (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 · 38 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Trazodone Hcl | 215 | 45 |
| Bupropion Hclbrand: Bupropion Xl | 207 | 31 |
| Alprazolam | 199 | 40 |
| Venlafaxine Hclbrand: Venlafaxine Hcl Er | 178 | 23 |
| Clonazepam | 166 | 31 |
| Lorazepam | 155 | 27 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-02-17
- Last updated
- 2012-01-19
Frequently asked questions
- What is William Walkup's NPI number?
- William Walkup's National Provider Identifier (NPI) is 1386619948, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Walkup's specialty?
- William Walkup is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is William Walkup located?
- William Walkup's practice location on file with NPPES is 125 Alpine Circle, Columbia, SC 29223.
- What is William Walkup's phone number?
- The practice phone number listed in the NPPES registry for William Walkup is (803) 779-3548.
- Does William Walkup accept Medicare?
- William Walkup is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Walkup's NPI active?
- Yes — William Walkup's NPI (1386619948) is active in the NPPES registry as of the last update on 2012-01-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.