Dr. Jon David Walker, MD
- Medicare services, 2024
- 79
- Medicare patients, 2024
- 48
- Part D claims, 2024
- 25
- Industry payments
- $245
- Affiliated sites
- 1
- Practice address
- 1855 N Fair Oaks Ave, Pasadena, CA 91103
- Practice phone
- Call (626) 398-6300
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Chapcare-Fair Oaks
Pasadena, California
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. Jon David Walker is a surgical oncologist in Pasadena, California
Dr. Walker practices at Chapcare-Fair Oaks in Pasadena, California.
Dr. Walker's NPI, 1801948898, was assigned on January 18, 2007. Dr. Walker graduated from University of Kentucky College of Medicine in 1973. Dr. Walker holds Kentucky license 17409.
- NPI
- 1801948898NPI Registry (opens in a new tab)
- NPI enumeration date
- January 18, 2007
- NPI status
- Active
- Practice phone
- (626) 398-6300
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 79
- Medical school graduation
- 1973
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Jon David Walker practices at Chapcare-Fair Oaks in Pasadena, California
Dr. Walker's primary practice is Chapcare-Fair Oaks, at 1855 N Fair Oaks Ave, Pasadena, CA 91103 in Los Angeles County. The practice phone is (626) 398-6300.
- Chapcare-Fair Oaks1855 N Fair Oaks Ave, Pasadena, CA 91103 · Los Angeles CountyPhone(626) 398-6300
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Jon David Walker is affiliated with 2 sites of care and 1 medical group
Dr. Walker's primary practice is Chapcare-Fair Oaks in Pasadena, California. Dmand AI also links Dr. Walker to 1 group practice or clinic and 1 medical group, each 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. Jon David 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 |
|---|---|
| Chapcare-Fair Oaks | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Jon David Walker is one of 243 surgical oncologists in California
Surgical oncology is Dr. Walker's primary specialty in the NPI Registry, under taxonomy code 2086X0206X. Dr. Walker is licensed in Kentucky.
Specialties and state licenses
- Surgical oncology, KentuckyPrimary
Surgical oncologists near Dr. Walker
Counts of surgical oncologists 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. Jon David Walker billed Medicare for 79 services in 2024
CMS data shows 79 Medicare services from Dr. Walker across 3 procedure codes in 2024, for 48 Medicare patients. Medicare paid $6,090 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: 1722024: 6363%
- Surgery
- 2023: 602024: 1673%
Dr. Walker compared with the California median for surgical oncologists, 2024
- Dr. Walker
- California median
- Medicare services
- 79vs 17254% below
- Medicare patients
- 48vs 11157% below
- Part D claims
- 25vs 2214% above
Medians across 217 surgical oncologists in California 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 surgical oncologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Jon David Walker treated 48 Medicare patients in 2024, average age 67
CMS counts 48 Medicare patients who saw Dr. Walker in 2024. The largest group is 65 to 74, with 18 patients. 75% of them have anxiety, and 75% have high blood pressure. 54% are also on Medicaid. Their average risk score is 4.31, 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 67% women.
Dr. Walker's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Walker's Medicare patients by sex, 2024
- Women1735%
- Men3165%
Chronic conditions among Dr. Walker's Medicare patients, 2024
- Anxiety75%
- High blood pressure75%
- High cholesterol75%
- Mood disorders67%
- Heart failure65%
- Chronic kidney disease63%
- Depression60%
- Atrial fibrillation58%
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
- Women67%
- Men33%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Jon David Walker wrote 25 Medicare Part D claims in 2024
In 2024, Dr. Walker wrote 25 Medicare Part D claims. 100% of them were for generic drugs. They cover 1 drug, with $258 in total drug cost. In 2023, CMS named 49 claims across 2 drugs.
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
- Opioids100%25 of 25 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: 492024: 2549%
Drugs named by CMS: 1 in 2024, 2 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
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Dr. Jon David Walker received $245 in industry payments from 2016 to 2018
CMS Open Payments shows 10 general payments to Dr. Walker from 5 drug and device companies from 2016 to 2018. Food and beverage make up the largest share, 100% of the total. Edwards Lifesciences Corporation paid the most, $116.
General payments to Dr. Walker by program year, 2016 to 2018
Companies that paid Dr. Walker the most, 2016 to 2018
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Jon David Walker graduated from University of Kentucky College of Medicine
Dr. Walker graduated from University of Kentucky College of Medicine in 1973.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Jon David 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) |
| 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. Jon David 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. Jon David Walker's NPI number?
Dr. Jon David Walker's NPI number is 1801948898. It was assigned on January 18, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Jon David Walker?
Dr. Jon David Walker is a surgical oncologist in Pasadena, California. The primary specialty in the NPI Registry is Surgical Oncology Physician (taxonomy code 2086X0206X).
Where does Dr. Jon David Walker practice?
Dr. Walker practices at 1855 N Fair Oaks Ave, Pasadena, CA 91103. Dr. Walker's primary practice is Chapcare-Fair Oaks in Pasadena, California. Dmand AI also links Dr. Walker to 1 group practice or clinic and 1 medical group.
What is Dr. Jon David Walker's office phone number?
The practice phone on file for Dr. Walker is (626) 398-6300.
What is Dr. Jon David Walker's medical license number?
Dr. Walker holds Kentucky license 17409.
Does Dr. Jon David Walker accept Medicare?
Yes. CMS data shows Dr. Walker billed Medicare for 79 services in 2024.
How many Medicare patients does Dr. Jon David Walker see?
CMS counts 48 Medicare patients who saw Dr. Walker in 2024, with an average age of 67.
What services does Dr. Jon David Walker bill to Medicare?
In 2024, Dr. Walker's most billed Medicare services were hospital inpatient care (99221), hospital inpatient care (99232) and surgery: digestive system (43246).
Where did Dr. Jon David Walker go to medical school?
Dr. Walker graduated from University of Kentucky College of Medicine in 1973.
What drugs does Dr. Jon David Walker prescribe most?
In 2024 Medicare Part D data, Dr. Walker's most prescribed drugs by claims were Hydrocodone-Acetaminophen.
Has Dr. Jon David Walker received payments from drug or device companies?
CMS Open Payments shows $245 in general payments to Dr. Walker from 5 companies from 2016 to 2018. The largest total came from Edwards Lifesciences Corporation.
How long has Dr. Jon David Walker been practicing?
Dr. Walker graduated from medical school in 1973, 53 years ago.
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