James Rex Walker, MD
Addiction Psychiatry Physician · Greer, SC
James Rex Walker, MD is an addiction psychiatry physician with a practice address in Greer, South Carolina, and NPI 1578901500, issued on Jun 12, 2013. Check the license (South Carolina MD35703, as entered in NPPES) on the South Carolina Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- James Rex Walker
- Credential
- MD
- Primary taxonomy
- Addiction Psychiatry Physician 2084P0802X
- License number
- MD35703 SC
Self-reported in NPPES; status is on the state search - Practice location
- 2700 E Phillips RD, Greer, SC 29650
- Phone
- (864) 235-2335
- Enumerated
- Jun 12, 2013
- Record last updated
- Aug 25, 2025
- Medicare enrollment
- Enrolled (PECOS I20240921000058); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
5 nearest addiction psychiatry physician records → All 6 in South Carolina → Look up another NPI →
Also registered at 2700 E Phillips RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kimberly AustinMental Health Counselor1922963115
- Ramon Balsa, MACounseling Psychologist1548422447
- Sydney Black, PA-CPhysician Assistant1811587272
- Bryant Byrne, M.D.Psychiatry Physician1447457130
- Laura Cook, FNP-BCFamily Nurse Practitioner1265681324
- Geetika Dembla, M.D.Sleep Medicine (Psychiatry & Neurology) Physician1164626875
Verify James Rex Walker in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersSouth Carolina Board of Medical Examiners
Search for license MD35703Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
15% more Medicare Part D claims than the average addiction psychiatry physician in 2024
826 Medicare Part D claims for 131 beneficiaries, against an average of 716 among the 421 providers of this specialty who prescribed in Part D. Brand-name drugs were 3% of claims.
Most prescribed
- Gabapentin62 claims
- Hydroxyzine Pamoate60 claims
- Quetiapine Fumarate47 claims
- Mirtazapine44 claims
- Naltrexone Hcl44 claims
- Trazodone Hcl44 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $20.73
1 payment: food and beverage; the largest payer was Idorsia Pharmaceuticals US Inc. The 170 providers of this specialty with any payment received $1,785.85 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Ria Health PCMiramar, FL
- Uhs OF Greenville, LLCGreer, SC
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Addiction Psychiatry Physician providers in South Carolina
There are 6 addiction psychiatry physician records in South Carolina.
All 6 in South Carolina → Every provider in Greer → Addiction Psychiatry Physician nationwide →
The 5 addiction psychiatry physician records with the nearest ZIP codes
- Amos Turner, MDGreer, SC 296501841684743
- Renee Lamm, M.D.Myrtle Beach, SC 295881245214592
- Raymond Anton, MDCharleston, SC 294251932304896
- Samuel Rosen, MDCharleston, SC 294141265430862
- Catherine Boylan, MDCharleston, SC 294011063905362
Common questions
What is James Rex Walker, MD's NPI number?
James Rex Walker, MD's National Provider Identifier (NPI) is 1578901500, issued on Jun 12, 2013. An NPI identifies a provider in billing; it is not a license.
Where is James Rex Walker, MD located?
The NPPES record lists a practice address at 2700 E Phillips RD, Greer, SC, 29650. Phone: (864) 235-2335. Providers update this record themselves, so call before visiting.
How can I verify James Rex Walker, MD's license?
NPPES lists South Carolina license number MD35703, as entered by the provider. Search the South Carolina Board of Medical Examiners at https://verify.llronline.com/LicLookup/Med/Med.aspx?div=22. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does James Rex Walker, MD prescribe under Medicare Part D?
In 2024, James Rex Walker, MD had 826 Medicare Part D claims for 131 beneficiaries; the average among addiction psychiatry physician prescribers was 716. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.