J Am Soc Nephrol
Kidney Failure, ChronicRenal Dialysis
Dr. Geoffrey S. Walker, MD
NPI1306890058
- Medicare services, 2022
- 141
- Part D claims, 2024
- 13
- Publications
- 1
- Industry payments
- $21,084
- Affiliated sites
- 1
- Practice address
- 2005 W Park Dr Ste 200 Suite 200, Irving, TX 75061
- Practice phone
- Call (214) 358-2300
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Dallas Nephrology Associates - Primary Care - Irving (W Park Dr)
Primary care practice · Irving, Texas
Find Dr. Walker's professional email, personal email and mobile number
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Dr. Geoffrey S. Walker is a nephrologist in Irving, Texas
Dr. Walker practices at Dallas Nephrology Associates - Primary Care - Irving (W Park Dr) in Irving, Texas.
Dr. Walker's NPI, 1306890058, was assigned on May 19, 2006. Dr. Walker graduated from University of Leeds School of Medicine in 1972. Dr. Walker's Texas license number on file is F5791.
NPI and contact details
- NPI
- 1306890058NPI Registry (opens in a new tab)
- NPI enumeration date
- May 19, 2006
- NPI status
- Active
- Practice phone
- (214) 358-2300
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 80
- Medical school graduation
- 1972
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Geoffrey S. Walker practices at 2 locations in Irving, Texas
Dr. Walker's primary practice is Dallas Nephrology Associates - Primary Care - Irving (W Park Dr), at 2005 W Park Dr Ste 200 Suite 200, Irving, TX 75061. The practice phone is (214) 358-2300. The NPI Registry lists Dr. Walker's practice address as 2535 W Airport Fwy, Irving, TX 75062.
- Dallas Nephrology Associates - Primary Care - Irving (W Park Dr)Primary2005 W Park Dr Ste 200 Suite 200, Irving, TX 75061Phone(214) 358-2300
- NPI Registry address2535 W Airport Fwy, Irving, TX 75062 · Dallas CountyPhone(214) 358-2300
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; Doctors and Clinicians National Downloadable File (CMS); and Dmand AI Practice Data
Dr. Geoffrey S. Walker is affiliated with 1 site of care and 1 medical group
Dr. Walker's primary practice is Dallas Nephrology Associates - Primary Care - Irving (W Park Dr) in Irving, Texas. The medical group on file is Dallas Nephrology Associates.
Dallas Nephrology Associates - Primary Care - Irving (W Park Dr)Primary
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dmand AI tracks the EHR system at Dr. Geoffrey S. 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 |
|---|---|
| Dallas Nephrology Associates - Primary Care - Irving (W Park Dr) | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Geoffrey S. Walker is one of 1,045 nephrologists in Texas
Nephrology is Dr. Walker's primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dr. Walker has a license on file in Texas.
Specialties and state licenses
- Nephrology, TexasPrimary
Nephrologists near Dr. Walker
Counts of nephrologists 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. Geoffrey S. Walker billed Medicare for 141 services in 2022
CMS data shows 141 Medicare services from Dr. Walker across 3 procedure codes in 2022. Medicare paid $15,600 for them. Every service was in an office.
Medicare services, 2022141
Paid by Medicare$15,600
Procedure codes3
Dr. Walker's Medicare services by type, 2021 to 2022
- 2021
- 2022
- Office and hospital visits
- 2021: 1982022: 6667%
- Tests and treatments
- 2021: 1832022: 4178%
- Surgery
- 2021: 1132022: 3470%
- Drugs given in the office
- 2021: 2,6702022: 0100%
- Lab and pathology
- 2021: 862022: 0100%
Dr. Walker compared with the Texas median for nephrologists, 2022
- Dr. Walker
- Texas median
- Medicare services
- 141vs 1,04887% below
- Part D claims
- 15vs 75898% below
Medians across 1,017 nephrologists in Texas with Dmand AI profiles that report each measure.
Dr. Walker's most billed Medicare procedure codes, 2022
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Walker?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Walker and other nephrologists in Texas.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Geoffrey S. Walker's patients have a median age of 72
Across all payers, Dmand AI patient panel data puts Dr. Walker's median patient age at 72, with 0% women.
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
- Women0%
- Men100%
Source: Dmand AI Patient Panel Data
Dr. Geoffrey S. Walker wrote 13 Medicare Part D claims in 2024
In 2024, Dr. Walker wrote 13 Medicare Part D claims. 92% of them were for generic drugs. They cover 1 drug, with $253 in total drug cost. In 2022, CMS named 296 claims across 13 drugs.
Part D claims, 202413
Drugs named by CMS1
Total drug cost$253
Dr. Walker's Part D claims by kind of drug, 2024
- Generic12 claims92%
- Brand-name and other1 claims8%
Dr. Walker's most prescribed drugs by claims, 2023
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2022 to 2023
- 2022
- 2023
- Claims for drugs CMS names
- 2022: 2962023: 1595%
Drugs named by CMS: 1 in 2023, 13 in 2022.
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
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Dr. Geoffrey S. Walker has 1 publication on record
Dmand AI links 1 paper to Dr. Walker in 2022. Dr. Walker's most frequent co-authors are Mary O'Kief Dittrich, MD, Barry Ira Freedman, MD and Jeffrey L. Hymes, MD.
Papers1
Dr. Walker's most frequent co-authors
- Mary O'Kief Dittrich, MD1 shared paper
- Barry Ira Freedman, MD1 shared paper
- Jeffrey L. Hymes, MD1 shared paper
Recent publications by Dr. Walker
See who Dr. Walker researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Walker works with, so you can find a warm path to the right nephrologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Geoffrey S. Walker received $21,084 in industry payments from 2016 to 2025
CMS Open Payments shows 33 general payments to Dr. Walker from 14 drug and device companies from 2016 to 2025. Consulting fees make up the largest share, 85% of the total. CorMedix Inc. paid the most, $15,562.
General payments to Dr. Walker by program year, 2016 to 2025
General payments to Dr. Walker by kind, 2016 to 2025
$21.1Kin total
- Consulting fees$17,96285%
- Food and beverage$2,24811%
- Travel and lodging$8534%
- Education$210%
Companies that paid Dr. Walker the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Geoffrey S. Walker has 2 awards and honors on record
Dmand AI lists 2 awards for Dr. Walker, most recently CMS Stage 1 2012 in 2012.
Awards and honors for Dr. Walker
- 2012
- CMS Stage 1 2012
- Undated
- ASN Fellow
Source: Dmand AI Professional Profile Data
Dr. Geoffrey S. Walker graduated from University of Leeds School of Medicine
Dr. Walker graduated from University of Leeds School of Medicine in 1972. Dr. Walker is a member of ASN.
- Medical school
Source: Dmand AI Professional Profile Data
Dr. Geoffrey S. Walker accepts plans from 6 insurance carriers
Dr. Walker is in network with 6 carriers, including Elevance, Blue Cross Blue Shield of Michigan and Cigna. PPO plans come from the most carriers, 6. Check the plan with the practice before a visit.
- Elevance
- Blue Cross Blue Shield of Michigan
- Cigna
- Blue Cross Blue Shield of Massachusetts
- Regence Health Plans
- Arkansas Blue Cross and Blue Shield
Plan types Dr. Walker accepts, by number of carriers
- PPO6
- Medicare5
- HMO3
- POS2
- EPO1
Source: Dmand AI Insurance Network Data
Sources for Dr. Geoffrey S. 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 Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| 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 Data |
| 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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network 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. Geoffrey S. 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. Geoffrey S. Walker's NPI number?
Dr. Geoffrey S. Walker's NPI number is 1306890058. It was assigned on May 19, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Geoffrey S. Walker?
Dr. Geoffrey S. Walker is a nephrologist in Irving, Texas. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).
Where does Dr. Geoffrey S. Walker practice?
Dr. Walker practices at 2005 W Park Dr Ste 200 Suite 200, Irving, TX 75061. Dr. Walker also practices at 2535 W Airport Fwy, Irving, TX 75062. Dr. Walker's primary practice is Dallas Nephrology Associates - Primary Care - Irving (W Park Dr) in Irving, Texas.
What is Dr. Geoffrey S. Walker's office phone number?
The practice phone on file for Dr. Walker is (214) 358-2300.
What is Dr. Geoffrey S. Walker's medical license number?
Dr. Walker's Texas license number on file is F5791.
What medical group is Dr. Geoffrey S. Walker part of?
Dr. Walker is linked to Dallas Nephrology Associates.
Does Dr. Geoffrey S. Walker accept Medicare?
Yes. CMS data shows Dr. Walker billed Medicare for 141 services in 2022.
What services does Dr. Geoffrey S. Walker bill to Medicare?
In 2022, Dr. Walker's most billed Medicare services were office visit, established patient (99214), dialysis (90960) and surgery: heart and blood vessels (36415).
Where did Dr. Geoffrey S. Walker go to medical school?
Dr. Walker graduated from University of Leeds School of Medicine in 1972.
What drugs does Dr. Geoffrey S. Walker prescribe most?
In 2023 Medicare Part D data, Dr. Walker's most prescribed drugs by claims were Furosemide.
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Has Dr. Geoffrey S. Walker received payments from drug or device companies?
CMS Open Payments shows $21,084 in general payments to Dr. Walker from 14 companies from 2016 to 2025. The largest total came from CorMedix Inc.
How long has Dr. Geoffrey S. Walker been practicing?
Dr. Walker graduated from medical school in 1972, 54 years ago.
Does Dr. Geoffrey S. Walker do research?
Dmand AI links 1 publication to Dr. Walker.
Who does Dr. Geoffrey S. Walker publish with?
Dr. Walker's most frequent co-authors are Mary O'Kief Dittrich, MD (1 shared paper), Barry Ira Freedman, MD (1 shared paper) and Jeffrey L. Hymes, MD (1 shared paper).
What insurance does Dr. Geoffrey S. Walker accept?
Dr. Walker is in network with 6 carriers, including Elevance, Blue Cross Blue Shield of Michigan and Cigna. PPO plans come from the most carriers, 6. Check the plan with the practice before a visit.
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