Dr. Robert Walker, MD
- Medicare services, 2024
- 456
- Medicare patients, 2024
- 371
- Part D claims, 2024
- 510
- Hospital affiliations
- 3
- Industry payments
- $1,063
- Practice address
- 7400 East Osborn Road, Scottsdale, AZ 85251
- Practice phone
- Call (480) 882-4004
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Walker's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Robert Walker is a gastroenterologist in Scottsdale, Arizona
Dr. Walker practices at HonorHealth Scottsdale Osborn Medical Center in Scottsdale, Arizona, part of HonorHealth.
Dr. Walker's NPI, 1396727129, was assigned on November 17, 2005. Dr. Walker graduated from New York Medical College in 1989. Dr. Walker holds New York license 199345.
- NPI
- 1396727129NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8123167129
- NPI enumeration date
- November 17, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (480) 882-4004
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 63
- Medical school graduation
- 1989
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Robert Walker practices at HonorHealth Scottsdale Osborn Medical Center in Scottsdale, Arizona
Dr. Walker's primary practice is HonorHealth Scottsdale Osborn Medical Center, at 7400 East Osborn Road, Scottsdale, AZ 85251 in Maricopa County. The practice phone is (480) 882-4004.
- HonorHealth Scottsdale Osborn Medical Center7400 East Osborn Road, Scottsdale, AZ 85251 · Maricopa CountyPhone(480) 882-4004
Source: Dmand AI Affiliation Data
Dr. Robert Walker is affiliated with 4 sites of care and 2 medical groups
Dr. Walker's primary practice is HonorHealth Scottsdale Osborn Medical Center in Scottsdale, Arizona, part of HonorHealth. Dr. Walker is also affiliated with HonorHealth Scottsdale Shea Medical Center. The medical group on file is HonorHealth Medical Group. Dmand AI also links Dr. Walker to 1 more hospital, 1 group practice or clinic and 1 medical group, 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 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 |
|---|---|
| HonorHealth Scottsdale Osborn Medical Center | Available with a free account |
| +3 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Robert Walker is one of 380 gastroenterologists in Arizona
Gastroenterology is Dr. Walker's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dmand AI has Dr. Walker's licenses on file in 2 states: New York and Arizona.
Specialties and state licenses
- Gastroenterology, New YorkPrimary
- Arizona license
Gastroenterologists near Dr. Walker
Counts of gastroenterologists 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 Walker billed Medicare for 456 services in 2024
CMS data shows 456 Medicare services from Dr. Walker across 9 procedure codes in 2024, for 371 Medicare patients. Medicare paid $32,341 for them.
Dr. Walker's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 5052024: 40021%
- Surgery
- 2023: 2062024: 5673%
- Lab and pathology
- 2023: 422024: 0100%
- Other services
- 2023: 1622024: 0100%
Where Dr. Walker's Medicare services took place, 2024
- In an office29565%
- In a facility16135%
Dr. Walker compared with the Arizona median for gastroenterologists, 2024
- Dr. Walker
- Arizona median
- Medicare services
- 456vs 50810% below
- Medicare patients
- 371vs 31916% above
- Part D claims
- 394vs 31027% above
Medians across 369 gastroenterologists in Arizona 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 gastroenterologists in Arizona.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Robert Walker treated 371 Medicare patients in 2024, average age 75
CMS counts 371 Medicare patients who saw Dr. Walker in 2024. The largest group is 65 to 74, with 150 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 12% are also on Medicaid. Their average risk score is 1.71, 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 69, with 56% women.
Dr. Walker's Medicare patients by age, 2024
Dr. Walker's Medicare patients by sex, 2024
- Women18951%
- Men18249%
Chronic conditions among Dr. Walker's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis52%
- Ischemic heart disease40%
- Diabetes38%
- Chronic kidney disease37%
- Anxiety27%
- Mood disorders27%
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 69
Patient panel by sex, all payers
- Women56%
- Men43%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Robert Walker wrote 510 Medicare Part D claims in 2024
In 2024, Dr. Walker wrote 510 Medicare Part D claims for 303 patients. 77% of them were for generic drugs. CMS names the drug for 394 of them, across 10 drugs with 11 or more claims each, at $338,212 in total drug cost. In 2023, CMS named 951 claims across 12 drugs.
Dr. Walker's Part D claims by kind of drug, 2024
- Generic393 claims77%
- Brand-name117 claims23%
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
- Antibiotics4%18 of 510 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: 9512024: 39459%
Drugs named by CMS: 10 in 2024, 12 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
Dr. Robert Walker ranks in the 89th percentile for upper gastrointestinal (gi) endoscopy for acid reflux in Medicare
Dr. Walker accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 182 procedures of upper gastrointestinal (gi) endoscopy for acid reflux by Dr. Walker, more than 89% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Walker ranks in Medicare procedure volume
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 89th percentile182 procedures
- Colonoscopy
- 82nd percentile109 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Robert Walker received $1,063 in industry payments from 2018 to 2025
CMS Open Payments shows 12 general payments to Dr. Walker from 8 drug and device companies from 2018 to 2025. Travel and lodging make up the largest share, 59% of the total. Stryker Corporation paid the most, $626.
General payments to Dr. Walker by program year, 2018 to 2025
General payments to Dr. Walker by kind, 2018 to 2025
- Travel and lodging$62659%
- Food and beverage$43841%
Companies that paid Dr. Walker the most, 2018 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Robert Walker graduated from New York Medical College
Dr. Walker graduated from New York Medical College in 1989.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Robert 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)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. Robert 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 Walker's NPI number?
Dr. Robert Walker's NPI number is 1396727129. It was assigned on November 17, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Robert Walker?
Dr. Robert Walker is a gastroenterologist in Scottsdale, Arizona. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Robert Walker practice?
Dr. Walker practices at 7400 East Osborn Road, Scottsdale, AZ 85251. Dr. Walker's primary practice is HonorHealth Scottsdale Osborn Medical Center in Scottsdale, Arizona, part of HonorHealth. Dmand AI also links Dr. Walker to 1 hospital, 1 group practice or clinic and 1 medical group.
What is Dr. Robert Walker's office phone number?
The practice phone on file for Dr. Walker is (480) 882-4004.
What is Dr. Robert Walker's medical license number?
Dr. Walker holds New York license 199345, one of the licenses on file in 2 states.
Which states has Dr. Robert Walker been licensed in?
Dmand AI has state licenses on file for Dr. Walker in New York and Arizona.
Which hospitals is Dr. Robert Walker affiliated with?
Dr. Walker practices at HonorHealth Scottsdale Osborn Medical Center in Scottsdale, Arizona. Dr. Walker is also affiliated with HonorHealth Scottsdale Shea Medical Center. Dmand AI links Dr. Walker to 1 more hospital.
What medical group is Dr. Robert Walker part of?
Dr. Walker is linked to HonorHealth Medical Group. Dmand AI links Dr. Walker to 1 more medical group.
Does Dr. Robert Walker accept Medicare?
Yes. CMS data shows Dr. Walker billed Medicare for 456 services in 2024, and Dr. Walker accepts Medicare assignment.
How many Medicare patients does Dr. Robert Walker see?
CMS counts 371 Medicare patients who saw Dr. Walker in 2024, with an average age of 75.
Show 5 more questionsShow fewer questions
What services does Dr. Robert Walker bill to Medicare?
In 2024, Dr. Walker's most billed Medicare services were office visit, established patient (99214), hospital inpatient care (99232) and office visit, established patient (99213).
Where did Dr. Robert Walker go to medical school?
Dr. Walker graduated from New York Medical College in 1989.
What drugs does Dr. Robert Walker prescribe most?
In 2024 Medicare Part D data, Dr. Walker's most prescribed drugs by claims were Pantoprazole Sodium, Famotidine and Omeprazole.
Has Dr. Robert Walker received payments from drug or device companies?
CMS Open Payments shows $1,063 in general payments to Dr. Walker from 8 companies from 2018 to 2025. The largest total came from Stryker Corporation.
How long has Dr. Robert Walker been practicing?
Dr. Walker graduated from medical school in 1989, 37 years ago.
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