JAMA Ophthalmol
Area Under CurveDiabetic RetinopathyFalse Negative Reactions
Dr. Jonathan D. Walker, MD
NPI1356399810
- Medicare services, 2020
- 213
- Part D claims, 2020
- 132
- Publications
- 1
- Industry payments
- $2,715
- State license
- 1
- Practice address
- 603 N State St, Girard, OH 44420
- Practice phone
- Call (260) 436-2181
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
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Dr. Jonathan D. Walker is an ophthalmologist in Girard, Ohio
Dr. Walker practices in Girard, Ohio.
Dr. Walker's NPI, 1356399810, was assigned on May 5, 2006. Dr. Walker holds Indiana license 01044777A.
NPI and contact details
- NPI
- 1356399810NPI Registry (opens in a new tab)
- NPI enumeration date
- May 5, 2006
- NPI status
- Active
- Practice phone
- (260) 436-2181
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); and Dmand AI Professional Profile Data
Dr. Jonathan D. Walker's practice address is in Girard, Ohio
Dr. Walker's practice address in the NPI Registry is 603 N State St, Girard, OH 44420, in Trumbull County. The practice phone is (260) 436-2181.
- NPI Registry address603 N State St, Girard, OH 44420 · Trumbull CountyPhone(260) 436-2181
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dmand AI tracks the EHR system at Dr. Jonathan D. 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
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Dr. Jonathan D. Walker is one of 658 ophthalmologists in Ohio
Ophthalmology is Dr. Walker's primary specialty in the NPI Registry, under taxonomy code 207W00000X. Dr. Walker is licensed in Indiana.
Specialties and state licenses
- Ophthalmology, IndianaPrimary
Ophthalmologists near Dr. Walker
Counts of ophthalmologists 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. Jonathan D. Walker billed Medicare for 213 services in 2020
CMS data shows 213 Medicare services from Dr. Walker across 5 procedure codes in 2020. Medicare paid $37,780 for them. Every service was in an office.
Medicare services, 2020213
Paid by Medicare$37,780
Procedure codes5
Dr. Walker's Medicare services by type, 2019 to 2020
- 2019
- 2020
- Tests and treatments
- 2019: 2,1212020: 13893%
- Drugs given in the office
- 2019: 1,0802020: 4696%
- Surgery
- 2019: 6152020: 2995%
- Office and hospital visits
- 2019: 272020: 0100%
Dr. Walker compared with the Ohio median for ophthalmologists, 2020
- Dr. Walker
- Ohio median
- Medicare services
- 213vs 1,18582% below
- Part D claims
- 132vs 64179% below
Medians across 673 ophthalmologists in Ohio with Dmand AI profiles that report each measure.
Dr. Walker's most billed Medicare procedure codes, 2020
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 ophthalmologists in Ohio.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Jonathan D. Walker's patients have a median age of 82
Across all payers, Dmand AI patient panel data puts Dr. Walker's median patient age at 82, with 57% 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 82
Patient panel by sex, all payers
- Women57%
- Men43%
Source: Dmand AI Patient Panel Data
Dr. Jonathan D. Walker wrote 132 Medicare Part D claims in 2020
In 2020, Dr. Walker wrote 132 Medicare Part D claims. They cover 5 drugs, with $17,422 in total drug cost. In 2019, CMS named 391 claims across 11 drugs.
Part D claims, 2020132
Drugs named by CMS5
Total drug cost$17,422
Dr. Walker's most prescribed drugs by claims, 2020
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, 2019 to 2020
- 2019
- 2020
- Claims for drugs CMS names
- 2019: 3912020: 13266%
Drugs named by CMS: 5 in 2020, 11 in 2019.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Jonathan D. Walker has 1 publication on record
Dmand AI links 1 paper to Dr. Walker. Dr. Walker's most frequent co-authors are James C. Folk, MD, Dennis P. Han, MD and Stephen R. Russell, MD.
Papers1
Dr. Walker's most frequent co-authors
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 ophthalmologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Jonathan D. Walker received $2,715 in industry payments from 2022 to 2023
CMS Open Payments shows 2 general payments to Dr. Walker from 1 drug or device company from 2022 to 2023. Consulting fees make up the largest share, 100% of the total. Digital Diagnostics Inc. paid the most, $2,715. It also lists 4 research payments totaling $6,713 from 2020 to 2021.
General payments to Dr. Walker by program year, 2022 to 2023
Companies that paid Dr. Walker the most, 2022 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Jonathan D. 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 |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (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) |
| 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. Jonathan D. 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. Jonathan D. Walker's NPI number?
Dr. Jonathan D. Walker's NPI number is 1356399810. It was assigned on May 5, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Jonathan D. Walker?
Dr. Jonathan D. Walker is an ophthalmologist in Girard, Ohio. The primary specialty in the NPI Registry is Ophthalmology Physician (taxonomy code 207W00000X).
Where does Dr. Jonathan D. Walker practice?
Dr. Walker practices at 603 N State St, Girard, OH 44420.
What is Dr. Jonathan D. Walker's office phone number?
The practice phone on file for Dr. Walker is (260) 436-2181.
What is Dr. Jonathan D. Walker's medical license number?
Dr. Walker holds Indiana license 01044777A.
Does Dr. Jonathan D. Walker accept Medicare?
Yes. CMS data shows Dr. Walker billed Medicare for 213 services in 2020.
What services does Dr. Jonathan D. Walker bill to Medicare?
In 2020, Dr. Walker's most billed Medicare services were eye exam or test (92134), eye exam or test (92012) and injected or infused drug (J0178).
What drugs does Dr. Jonathan D. Walker prescribe most?
In 2020 Medicare Part D data, Dr. Walker's most prescribed drugs by claims were Ketorolac Tromethamine, Diclofenac Sodium and Ilevro.
Has Dr. Jonathan D. Walker received payments from drug or device companies?
CMS Open Payments shows $2,715 in general payments to Dr. Walker from 1 company from 2022 to 2023. The largest total came from Digital Diagnostics Inc.
How long has Dr. Jonathan D. Walker been practicing?
Dr. Walker's NPI was assigned in 2006.
Does Dr. Jonathan D. Walker do research?
Dmand AI links 1 publication to Dr. Walker.
Who does Dr. Jonathan D. Walker publish with?
Dr. Walker's most frequent co-authors are James C. Folk, MD (1 shared paper), Dennis P. Han, MD (1 shared paper) and Stephen R. Russell, MD (1 shared paper).
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