James Walker, MD
NPI 1578901500 · Addiction Psychiatry Physician · Greer, SC
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
James Walker, MD is a Addiction Psychiatry Physician provider in Greer, SC (NPI 1578901500).
Provider details
- NPI number
- 1578901500
- Entity type
- Individual
- Primary specialty
- Addiction Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- MD35703 (SC)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
13 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
380 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 279 | $74 |
| Hospital Discharge Day Management, 30 Minutes Or Less99238 | 41 | $76 |
| Psychiatric Diagnostic Evaluation With Medical Services90792 | 38 | $128 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 22 | $123 |
Typical Medicare-allowed amounts for these services range $74–$128 (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 · 21 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Gabapentin | 62 | 36 |
| Hydroxyzine Pamoate | 60 | 42 |
| Quetiapine Fumarate | 47 | 28 |
| Mirtazapine | 44 | 26 |
| Naltrexone Hcl | 44 | 27 |
| Trazodone Hcl | 44 | 25 |
| Buprenorphine Hcl/Naloxone Hclbrand: Buprenorphine-Naloxone |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$21 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 2700 Coltsgate Rd Ste 106Charlotte, NC 28211-3573Phone: (864) 661-6307
Registry dates
- Enumerated
- 2013-06-12
- Last updated
- 2025-08-25
- Certified
- 2025-08-25
Frequently asked questions
- What is James Walker's NPI number?
- James Walker's National Provider Identifier (NPI) is 1578901500, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is James Walker's specialty?
- James Walker is listed in the NPPES registry with a primary specialty of Addiction Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is James Walker located?
- James Walker's practice location on file with NPPES is 2700 E Phillips Rd, Greer, SC 29650-4815.
- What is James Walker's phone number?
- The practice phone number listed in the NPPES registry for James Walker is (864) 235-2335.
- Does James Walker accept Medicare?
- James Walker is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is James Walker's NPI active?
- Yes — James Walker's NPI (1578901500) is active in the NPPES registry as of the last update on 2025-08-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.