Adipose TissueAnalysis of VarianceBlotting, Western
Dr. John Allan Walker, MD
NPI1285714386
- Medicare services, 2017
- 44
- Publications
- 1
- State license
- 1
- Year NPI issued
- 2006
- Practice address
- 820 Scenic Dr, Modesto, CA 95350-6131
- Practice phone
- Call (209) 558-8804
- 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. John Allan Walker is an internist in Modesto, California
Dr. Walker practices in Modesto, California.
Dr. Walker's NPI, 1285714386, was assigned on October 16, 2006. Dr. Walker graduated from Duke University School Of Medicine in 1971. Dr. Walker's California license number on file is G64249.
NPI and contact details
- NPI
- 1285714386NPI Registry (opens in a new tab)
- NPI enumeration date
- October 16, 2006
- NPI status
- Active
- Practice phone
- (209) 558-8804
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Medical school graduation
- 1971
Sources: NPPES NPI Registry (CMS); and Dmand AI Professional Profile Data
Dr. John Allan Walker's practice address is in Modesto, California
Dr. Walker's practice address in the NPI Registry is 820 Scenic Dr, Modesto, CA 95350-6131. The practice phone is (209) 558-8804.
- NPI Registry address820 Scenic Dr, Modesto, CA 95350-6131Phone(209) 558-8804
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dmand AI tracks the EHR system at Dr. John Allan 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 |
|---|---|
| Dr. Walker's practice | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
See the EHR and IT leaders at every site where Dr. Walker practices
Dmand AI maps EHR vendors, IT decision makers and buying committees across each health system and 6.2K+ hospitals, with verified contacts in the same login.
Dr. John Allan Walker is one of 16,751 internists in California
Internal medicine is Dr. Walker's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Walker is board certified in internal medicine by the American Board of Internal Medicine. Dr. Walker has a license on file in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Internists near Dr. Walker
Counts of internists 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 Allan Walker billed Medicare for 44 services in 2017
CMS data shows 44 Medicare services from Dr. Walker across 2 procedure codes in 2017. Medicare paid $2,076 for them. Every service was in an office.
Medicare services, 201744
Paid by Medicare$2,076
Procedure codes2
Dr. Walker's Medicare services by type, 2016 to 2017
- 2016
- 2017
- Lab and pathology
- 2016: 762017: 4442%
- Office and hospital visits
- 2016: 562017: 0100%
Dr. Walker compared with the California median for internists, 2017
- Dr. Walker
- California median
- Medicare services
- 44vs 36188% below
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Walker's most billed Medicare procedure codes, 2017
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 internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John Allan Walker's patients have a median age of 39
Across all payers, Dmand AI patient panel data puts Dr. Walker's median patient age at 39, with 66% 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 39
Patient panel by sex, all payers
- Women66%
- Men34%
Source: Dmand AI Patient Panel Data
For MedTech and pharma teams
Find internists like Dr. Walker by procedure volume and prescribing
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. John Allan Walker has 1 publication on record
Dmand AI links 1 paper to Dr. Walker. Dr. Walker's most frequent co-authors are David E. Sahar, MD, Stacy Michelle Stephenson, MD and John Allen Walker, MD.
Papers1
Dr. Walker's most frequent co-authors
- David E. Sahar, MD1 shared paper
- Stacy Michelle Stephenson, MD1 shared paper
- John Allen Walker, 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 internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. John Allan Walker graduated from Duke University School Of Medicine
Dr. Walker graduated from Duke University School Of Medicine in 1971.
- Medical school
- Board certified in internal medicine
- Board certified in occupational medicine
Source: Dmand AI Professional Profile Data
Sources for Dr. John Allan 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 |
| 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 |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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 Allan 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 Allan Walker's NPI number?
Dr. John Allan Walker's NPI number is 1285714386. It was assigned on October 16, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John Allan Walker?
Dr. John Allan Walker is an internist in Modesto, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. John Allan Walker practice?
Dr. Walker practices at 820 Scenic Dr, Modesto, CA 95350-6131.
What is Dr. John Allan Walker's office phone number?
The practice phone on file for Dr. Walker is (209) 558-8804.
What is Dr. John Allan Walker's medical license number?
Dr. Walker's California license number on file is G64249.
Does Dr. John Allan Walker accept Medicare?
Yes. CMS data shows Dr. Walker billed Medicare for 44 services in 2017.
Is Dr. John Allan Walker board certified?
Yes. Dr. Walker is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. John Allan Walker bill to Medicare?
In 2017, Dr. Walker's most billed Medicare services were lab and pathology test (87491) and lab and pathology test (87591).
Where did Dr. John Allan Walker go to medical school?
Dr. Walker graduated from Duke University School Of Medicine in 1971.
How long has Dr. John Allan Walker been practicing?
Dr. Walker graduated from medical school in 1971, 55 years ago.
Does Dr. John Allan Walker do research?
Dmand AI links 1 publication to Dr. Walker.
Who does Dr. John Allan Walker publish with?
Dr. Walker's most frequent co-authors are David E. Sahar, MD (1 shared paper), Stacy Michelle Stephenson, MD (1 shared paper) and John Allen Walker, MD (1 shared paper).
Selling to internal medicine practices?
See internists in California by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card