Dr. Marcial A. Walker, MD
- Medicare services, 2024
- 56
- Medicare patients, 2024
- 36
- Part D claims, 2024
- 1,779
- Industry payments
- $3,006
- Affiliated sites
- 1
- Practice address
- 43 18, San Juan, PR 00924
- Practice phone
- Call (787) 772-8300
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Centro De Cancer De La Universidad
San Juan, Puerto Rico
Find Dr. Walker's professional email, personal email and mobile number
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Dr. Marcial A. Walker is a urologist in San Juan, Puerto Rico
Dr. Walker practices at Centro De Cancer De La Universidad in San Juan, Puerto Rico.
Dr. Walker's NPI, 1811959158, was assigned on April 3, 2006. Dr. Walker graduated from University of Puerto Rico School of Medicine in 1992. Dr. Walker holds Puerto Rico license 12551.
- NPI
- 1811959158NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4284893470
- NPI enumeration date
- April 3, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (787) 772-8300
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 60
- Medical school graduation
- 1992
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Marcial A. Walker practices at Centro De Cancer De La Universidad in San Juan, Puerto Rico
Dr. Walker's primary practice is Centro De Cancer De La Universidad, at 43 18, San Juan, PR 00924 in San Juan County. The practice phone is (787) 772-8300.
- Centro De Cancer De La Universidad43 18, San Juan, PR 00924 · San Juan CountyPhone(787) 772-8300
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Marcial A. Walker is affiliated with 2 sites of care
Dr. Walker's primary practice is Centro De Cancer De La Universidad in San Juan, Puerto Rico. Dmand AI also links Dr. Walker to 1 physician office, named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Marcial A. Walker's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Walker practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Centro De Cancer De La Universidad | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Marcial A. Walker is one of 94 urologists in Puerto Rico
Urology is Dr. Walker's primary specialty in the NPI Registry, under taxonomy code 208800000X. Dr. Walker is licensed in Puerto Rico.
Specialties and state licenses
- Urology, Puerto RicoPrimary
Urologists near Dr. Walker
Counts of urologists 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. Marcial A. Walker billed Medicare for 56 services in 2024
CMS data shows 56 Medicare services from Dr. Walker across 3 procedure codes in 2024, all of them office visits, for 36 Medicare patients. Medicare paid $4,472 for them. Every service was in an office.
Dr. Walker's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 762024: 5626%
Dr. Walker compared with the Puerto Rico median for urologists, 2024
- Dr. Walker
- Puerto Rico median
- Medicare services
- 56vs 6413% below
- Medicare patients
- 36vs 4520% below
- Part D claims
- 1,669vs 1,8098% below
Medians across 98 urologists in Puerto Rico 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 urologists in Puerto Rico.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Marcial A. Walker treated 36 Medicare patients in 2024, average age 75
CMS counts 36 Medicare patients who saw Dr. Walker in 2024. The largest group is 75 to 84, with 16 patients. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 1.23, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Walker's median patient age at 71, with 0% women.
Dr. Walker's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Chronic conditions among Dr. Walker's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Diabetes61%
- Cancer44%
- Chronic kidney disease44%
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 71
Patient panel by sex, all payers
- Women0%
- Men100%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Marcial A. Walker wrote 1,779 Medicare Part D claims in 2024
In 2024, Dr. Walker wrote 1,779 Medicare Part D claims for 674 patients. 99% of them were for generic drugs. CMS names the drug for 1,669 of them, across 10 drugs with 11 or more claims each, at $25,613 in total drug cost. In 2023, CMS named 1,550 claims across 10 drugs.
Dr. Walker's Part D claims by kind of drug, 2024
- Generic1,764 claims99%
- Brand-name15 claims1%
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
- Antibiotics11%202 of 1,779 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: 1,5502024: 1,6698%
Drugs named by CMS: 10 in 2024, 10 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. Marcial A. Walker takes part in Medicare
Dr. Walker accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Prostate resection: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Marcial A. Walker received $3,006 in industry payments from 2016 to 2024
CMS Open Payments shows 48 general payments to Dr. Walker from 15 drug and device companies from 2016 to 2024. Food and beverage make up the largest share, 99% of the total. Boston Scientific Corporation paid the most, $842.
General payments to Dr. Walker by program year, 2016 to 2024
General payments to Dr. Walker by kind, 2016 to 2024
- Food and beverage$2,98599%
- Education$211%
Companies that paid Dr. Walker the most, 2016 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Marcial A. Walker graduated from University of Puerto Rico School of Medicine
Dr. Walker graduated from University of Puerto Rico School of Medicine in 1992.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Marcial A. 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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation 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)Doctors and Clinicians Utilization Data (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. Marcial A. 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. Marcial A. Walker's NPI number?
Dr. Marcial A. Walker's NPI number is 1811959158. It was assigned on April 3, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Marcial A. Walker?
Dr. Marcial A. Walker is a urologist in San Juan, Puerto Rico. The primary specialty in the NPI Registry is Urology Physician (taxonomy code 208800000X).
Where does Dr. Marcial A. Walker practice?
Dr. Walker practices at 43 18, San Juan, PR 00924. Dr. Walker's primary practice is Centro De Cancer De La Universidad in San Juan, Puerto Rico. Dmand AI also links Dr. Walker to 1 physician office.
What is Dr. Marcial A. Walker's office phone number?
The practice phone on file for Dr. Walker is (787) 772-8300.
What is Dr. Marcial A. Walker's medical license number?
Dr. Walker holds Puerto Rico license 12551.
Does Dr. Marcial A. Walker accept Medicare?
Yes. CMS data shows Dr. Walker billed Medicare for 56 services in 2024, and Dr. Walker accepts Medicare assignment.
How many Medicare patients does Dr. Marcial A. Walker see?
CMS counts 36 Medicare patients who saw Dr. Walker in 2024, with an average age of 75.
What services does Dr. Marcial A. Walker bill to Medicare?
In 2024, Dr. Walker's most billed Medicare services were office visit, established patient (99214), office visit, established patient (99213) and office visit, new patient (99204).
Where did Dr. Marcial A. Walker go to medical school?
Dr. Walker graduated from University of Puerto Rico School of Medicine in 1992.
What drugs does Dr. Marcial A. Walker prescribe most?
In 2024 Medicare Part D data, Dr. Walker's most prescribed drugs by claims were Tamsulosin HCl, Ciprofloxacin HCl and Sildenafil Citrate.
Has Dr. Marcial A. Walker received payments from drug or device companies?
CMS Open Payments shows $3,006 in general payments to Dr. Walker from 15 companies from 2016 to 2024. The largest total came from Boston Scientific Corporation.
How long has Dr. Marcial A. Walker been practicing?
Dr. Walker graduated from medical school in 1992, 34 years ago.
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