Dr. John S. Walker, DO
- Medicare services, 2024
- 236
- Medicare patients, 2024
- 221
- MIPS score, 2024
- 100
- Hospital affiliations
- 3
- Industry payments
- $254
- Practice address
- 110 Rehill Ave, Somerville, NJ 08876
- Practice phone
- Call (908) 685-2200
- 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
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Dr. John S. Walker is an anesthesiologist in Somerville, New Jersey
Dr. Walker practices at Robert Wood Johnson University Hospital Somerset in Somerville, New Jersey, part of RWJBarnabas Health.
Dr. Walker's NPI, 1013974500, was assigned on April 27, 2006. Dr. Walker graduated from New York College of Osteo Medicine of New York Institute of Technology in 1990. Dr. Walker holds New Jersey license MB56549.
- NPI
- 1013974500NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0547334997
- NPI enumeration date
- April 27, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (908) 685-2200
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 62
- Medical school graduation
- 1990
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John S. Walker practices at Robert Wood Johnson University Hospital Somerset in Somerville, New Jersey
Dr. Walker's primary practice is Robert Wood Johnson University Hospital Somerset, at 110 Rehill Ave, Somerville, NJ 08876 in Somerset County. The practice phone is (908) 685-2200.
- Robert Wood Johnson University Hospital Somerset110 Rehill Ave, Somerville, NJ 08876 · Somerset CountyPhone(908) 685-2200
Source: Dmand AI Affiliation Data
Dr. John S. Walker is affiliated with 6 sites of care and 3 medical groups
Dr. Walker's primary practice is Robert Wood Johnson University Hospital Somerset in Somerville, New Jersey, part of RWJBarnabas Health. Dr. Walker is also affiliated with Robert Wood Johnson University Hospital. The medical group on file is RWJBarnabas Health Medical Group. Dmand AI also links Dr. Walker to 1 more hospital, 3 group practices and clinics and 2 medical groups, 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. John S. Walker's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Walker practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Robert Wood Johnson University Hospital Somerset | Available with a free account |
| +5 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dmand AI maps EHR vendors, IT decision makers and buying committees across RWJBarnabas Health and 6.2K+ hospitals, with verified contacts in the same login.
Dr. John S. Walker is one of 1,613 anesthesiologists in New Jersey
Anesthesiology is Dr. Walker's primary specialty in the NPI Registry, under taxonomy code 207L00000X. Dr. Walker is licensed in New Jersey.
Specialties and state licenses
- Anesthesiology, New JerseyPrimary
Anesthesiologists near Dr. Walker
Counts of anesthesiologists 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. John S. Walker billed Medicare for 236 services in 2024
CMS data shows 236 Medicare services from Dr. Walker across 2 procedure codes in 2024, for 221 Medicare patients. Medicare paid $19,558 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
- Anesthesia
- 2023: 2582024: 2369%
- Surgery
- 2023: 142024: 0100%
Dr. Walker compared with the New Jersey median for anesthesiologists, 2024
- Dr. Walker
- New Jersey median
- Medicare services
- 236vs 922.6 times
- Medicare patients
- 221vs 16931% above
Medians across 1,604 anesthesiologists in New Jersey 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 anesthesiologists in New Jersey.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John S. Walker treated 221 Medicare patients in 2024, average age 70
CMS counts 221 Medicare patients who saw Dr. Walker in 2024. The largest group is 65 to 74, with 94 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 16% are also on Medicaid. Their average risk score is 1.38, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Walker's median patient age at 64, with 37% women.
Dr. Walker's Medicare patients by age, 2024
Dr. Walker's Medicare patients by sex, 2024
- Women11050%
- Men11150%
Chronic conditions among Dr. Walker's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis55%
- Anxiety43%
- Mood disorders42%
- Diabetes39%
- Depression37%
- Ischemic heart disease35%
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 64
Patient panel by sex, all payers
- Women37%
- Men60%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John S. Walker scored 100 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 100 out of 100 for Dr. Walker for performance year 2024, reported as part of a group. Dr. Walker accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Walker's MIPS scores, performance year 2024
- 100of 100Final score
- 94.9of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. John S. Walker received $254 in industry payments from 2016 to 2025
CMS Open Payments shows 11 general payments to Dr. Walker from 7 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Medtronic, Inc. paid the most, $85.
General payments to Dr. Walker by program year, 2016 to 2025
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. John S. Walker graduated from New York College of Osteo Medicine of New York Institute of Technology
Dr. Walker graduated from New York College of Osteo Medicine of New York Institute of Technology in 1990.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. John 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 | 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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (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. John 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. John S. Walker's NPI number?
Dr. John S. Walker's NPI number is 1013974500. It was assigned on April 27, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John S. Walker?
Dr. John S. Walker is an anesthesiologist in Somerville, New Jersey. The primary specialty in the NPI Registry is Anesthesiology Physician (taxonomy code 207L00000X).
Where does Dr. John S. Walker practice?
Dr. Walker practices at 110 Rehill Ave, Somerville, NJ 08876. Dr. Walker's primary practice is Robert Wood Johnson University Hospital Somerset in Somerville, New Jersey, part of RWJBarnabas Health. Dmand AI also links Dr. Walker to 1 hospital, 3 group practices and clinics and 2 medical groups.
What is Dr. John S. Walker's office phone number?
The practice phone on file for Dr. Walker is (908) 685-2200.
What is Dr. John S. Walker's medical license number?
Dr. Walker holds New Jersey license MB56549.
Which hospitals is Dr. John S. Walker affiliated with?
Dr. Walker practices at Robert Wood Johnson University Hospital Somerset in Somerville, New Jersey. Dr. Walker is also affiliated with Robert Wood Johnson University Hospital. Dmand AI links Dr. Walker to 1 more hospital.
What medical group is Dr. John S. Walker part of?
Dr. Walker is linked to RWJBarnabas Health Medical Group. Dmand AI links Dr. Walker to 2 more medical groups.
Does Dr. John S. Walker accept Medicare?
Yes. CMS data shows Dr. Walker billed Medicare for 236 services in 2024, and Dr. Walker accepts Medicare assignment.
What is Dr. John S. Walker's MIPS score?
Dr. Walker's MIPS final score for performance year 2024 is 100 out of 100, reported as part of a group.
How many Medicare patients does Dr. John S. Walker see?
CMS counts 221 Medicare patients who saw Dr. Walker in 2024, with an average age of 70.
Show 4 more questionsShow fewer questions
What services does Dr. John S. Walker bill to Medicare?
In 2024, Dr. Walker's most billed Medicare services were anesthesia (00104) and anesthesia (00812).
Where did Dr. John S. Walker go to medical school?
Dr. Walker graduated from New York College of Osteo Medicine of New York Institute of Technology in 1990.
Has Dr. John S. Walker received payments from drug or device companies?
CMS Open Payments shows $254 in general payments to Dr. Walker from 7 companies from 2016 to 2025. The largest total came from Medtronic, Inc.
How long has Dr. John S. Walker been practicing?
Dr. Walker graduated from medical school in 1990, 36 years ago.
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