Dr. Robert Ricardo Walker, MD
- Medicare services, 2024
- 1,114
- Medicare patients, 2024
- 706
- Part D claims, 2024
- 409
- Hospital affiliations
- 3
- Industry payments
- $20
- Practice address
- 302 University Parkway, Aiken, SC 29801
- Practice phone
- Call (803) 641-5900
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Walker's professional email, personal email and mobile number
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Dr. Robert Ricardo Walker is an internist in Aiken, South Carolina
Dr. Walker practices at Aiken Regional Medical Centers in Aiken, South Carolina, part of Universal Health Services.
Dr. Walker's NPI, 1659320943, was assigned on May 6, 2006. Dr. Walker graduated from University of South Carolina School of Medicine in 1996. Dr. Walker holds South Carolina license 19534.
- NPI
- 1659320943NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1355246612
- NPI enumeration date
- May 6, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (803) 641-5900
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 56
- Medical school graduation
- 1996
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Robert Ricardo Walker practices at Aiken Regional Medical Centers in Aiken, South Carolina
Dr. Walker's primary practice is Aiken Regional Medical Centers, at 302 University Parkway, Aiken, SC 29801 in Aiken County. The practice phone is (803) 641-5900.
- Aiken Regional Medical Centers302 University Parkway, Aiken, SC 29801 · Aiken CountyPhone(803) 641-5900
Source: Dmand AI Affiliation Data
Dr. Robert Ricardo Walker is affiliated with 4 sites of care and 6 medical groups
Dr. Walker's primary practice is Aiken Regional Medical Centers in Aiken, South Carolina, part of Universal Health Services. Dr. Walker is also affiliated with Wellstar MCG Health Medical Center. The medical group on file is Sound Physicians. Dmand AI also links Dr. Walker to 1 more hospital, 5 medical groups and 1 physician office, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Robert Ricardo Walker's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Walker practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Aiken Regional Medical Centers | Available with a free account |
| +3 more sites and 5 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Robert Ricardo Walker is one of 1,707 internists in South Carolina
Internal medicine is Dr. Walker's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Walker is licensed in South Carolina.
Specialties and state licenses
- Internal medicine, South CarolinaPrimary
Internists near Dr. Walker
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Robert Ricardo Walker billed Medicare for 1,114 services in 2024
CMS data shows 1,114 Medicare services from Dr. Walker across 7 procedure codes in 2024, for 706 Medicare patients. Medicare paid $110,288 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Walker's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1,2242024: 1,1149%
- Surgery
- 2023: 132024: 0100%
Dr. Walker compared with the South Carolina median for internists, 2024
- Dr. Walker
- South Carolina median
- Medicare services
- 1,114vs 74051% above
- Medicare patients
- 706vs 2582.7 times
- Part D claims
- 116vs 33165% below
Medians across 1,708 internists in South Carolina with Dmand AI profiles that report each measure.
Dr. Walker's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Walker and other internists in South Carolina.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Robert Ricardo Walker treated 706 Medicare patients in 2024, average age 77
CMS counts 706 Medicare patients who saw Dr. Walker in 2024. The largest group is 75 to 84, with 264 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 18% are also on Medicaid. Their average risk score is 2.18, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Walker's median patient age at 72, with 54% women.
Dr. Walker's Medicare patients by age, 2024
Dr. Walker's Medicare patients by sex, 2024
- Women37353%
- Men33347%
Chronic conditions among Dr. Walker's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis58%
- Chronic kidney disease50%
- Ischemic heart disease48%
- Heart failure46%
- Diabetes44%
- Anxiety42%
Share of Medicare patients with each condition. A patient can have several.
Dr. Walker's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 72
Patient panel by sex, all payers
- Women54%
- Men46%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Robert Ricardo Walker wrote 409 Medicare Part D claims in 2024
In 2024, Dr. Walker wrote 409 Medicare Part D claims for 116 patients. 92% of them were for generic drugs. CMS names the drug for 116 of them, across 8 drugs with 11 or more claims each, at $1,508 in total drug cost. In 2023, CMS named 75 claims across 6 drugs.
Dr. Walker's Part D claims by kind of drug, 2024
- Generic375 claims92%
- Brand-name and other34 claims8%
Dr. Walker's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Walker's Part D claims, 2024
- Antibiotics17%68 of 409 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 752024: 11655%
Drugs named by CMS: 8 in 2024, 6 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Robert Ricardo Walker takes part in Medicare
Dr. Walker accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Robert Ricardo Walker received $20 in industry payments in 2024
CMS Open Payments shows 1 general payment to Dr. Walker from 1 drug or device company in 2024. Food and beverage make up the largest share, 100% of the total. Ceribell, Inc. paid the most, $20. It also lists 1 research payment totaling $2,500 in 2018.
Companies that paid Dr. Walker the most, 2024 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Robert Ricardo Walker graduated from University of South Carolina School of Medicine
Dr. Walker graduated from University of South Carolina School of Medicine in 1996.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Robert Ricardo Walker's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Robert Ricardo Walker
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Robert Ricardo Walker's NPI number?
Dr. Robert Ricardo Walker's NPI number is 1659320943. It was assigned on May 6, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Robert Ricardo Walker?
Dr. Robert Ricardo Walker is an internist in Aiken, South Carolina. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Robert Ricardo Walker practice?
Dr. Walker practices at 302 University Parkway, Aiken, SC 29801. Dr. Walker's primary practice is Aiken Regional Medical Centers in Aiken, South Carolina, part of Universal Health Services. Dmand AI also links Dr. Walker to 1 hospital, 5 medical groups and 1 physician office.
What is Dr. Robert Ricardo Walker's office phone number?
The practice phone on file for Dr. Walker is (803) 641-5900.
What is Dr. Robert Ricardo Walker's medical license number?
Dr. Walker holds South Carolina license 19534.
Which hospitals is Dr. Robert Ricardo Walker affiliated with?
Dr. Walker practices at Aiken Regional Medical Centers in Aiken, South Carolina. Dr. Walker is also affiliated with Wellstar MCG Health Medical Center. Dmand AI links Dr. Walker to 1 more hospital.
What medical group is Dr. Robert Ricardo Walker part of?
Dr. Walker is linked to Sound Physicians. Dmand AI links Dr. Walker to 5 more medical groups.
Does Dr. Robert Ricardo Walker accept Medicare?
Yes. CMS data shows Dr. Walker billed Medicare for 1,114 services in 2024, and Dr. Walker accepts Medicare assignment.
How many Medicare patients does Dr. Robert Ricardo Walker see?
CMS counts 706 Medicare patients who saw Dr. Walker in 2024, with an average age of 77.
What services does Dr. Robert Ricardo Walker bill to Medicare?
In 2024, Dr. Walker's most billed Medicare services were hospital inpatient care (99223), hospital inpatient care (99233) and hospital inpatient care (99232).
Show 4 more questionsShow fewer questions
Where did Dr. Robert Ricardo Walker go to medical school?
Dr. Walker graduated from University of South Carolina School of Medicine in 1996.
What drugs does Dr. Robert Ricardo Walker prescribe most?
In 2024 Medicare Part D data, Dr. Walker's most prescribed drugs by claims were Pantoprazole Sodium, Doxycycline Hyclate and Diltiazem 24hr ER (Cd).
Has Dr. Robert Ricardo Walker received payments from drug or device companies?
CMS Open Payments shows $20 in general payments to Dr. Walker from 1 company from 2024 to 2024. The largest total came from Ceribell, Inc.
How long has Dr. Robert Ricardo Walker been practicing?
Dr. Walker graduated from medical school in 1996, 30 years ago.
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