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Dr. Jonathan Shaffer, DO
NPI1437513173
- Medicare services, 2020
- 404
- Part D claims, 2020
- 68
- Publications
- 7
- Hospital affiliations
- 1
- Industry payments
- $450
- Practice address
- 225 E Chicago Ave, Box 140, Chicago, IL 60611
- Practice phone
- Call (312) 227-4000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Shaffer'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. Jonathan Shaffer is an internist in Chicago, Illinois
Dr. Shaffer practices at Ann & Robert H. Lurie Children's Hospital of Chicago in Chicago, Illinois, part of Ann & Robert H. Lurie Children's Hospital of Chicago.
Dr. Shaffer's NPI, 1437513173, was assigned on April 8, 2016. Dr. Shaffer holds Wisconsin license 68896.
NPI and contact details
- NPI
- 1437513173NPI Registry (opens in a new tab)
- NPI enumeration date
- April 8, 2016
- NPI status
- Active
- Practice phone
- (312) 227-4000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Jonathan Shaffer practices at Ann & Robert H. Lurie Children's Hospital of Chicago in Chicago, Illinois
Dr. Shaffer's primary practice is Ann & Robert H. Lurie Children's Hospital of Chicago, at 225 E Chicago Ave, Box 140, Chicago, IL 60611 in Cook County. The practice phone is (312) 227-4000.
- Ann & Robert H. Lurie Children's Hospital of Chicago225 E Chicago Ave, Box 140, Chicago, IL 60611 · Cook CountyPhone(312) 227-4000
Source: Dmand AI Affiliation Data
Dr. Jonathan Shaffer is affiliated with 2 sites of care and 3 medical groups
Dr. Shaffer's primary practice is Ann & Robert H. Lurie Children's Hospital of Chicago in Chicago, Illinois, part of Ann & Robert H. Lurie Children's Hospital of Chicago. The medical group on file is Lurie Children's Medical Group. Dmand AI also links Dr. Shaffer to 2 more medical groups and 1 clinical lab, each named with a free account.
Lurie Children's Medical Group2 medical groupsNames with a free account1 clinical labName with a free account
See all 5 affiliations for Dr. ShafferSources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Jonathan Shaffer's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Shaffer practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Ann & Robert H. Lurie Children's Hospital of Chicago | Available with a free account |
| +1 more site and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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Dr. Jonathan Shaffer is one of 5,652 internists in Illinois
Internal medicine is Dr. Shaffer's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Shaffer is licensed in Wisconsin.
Specialties and state licenses
- Internal medicine, WisconsinPrimary
Internists near Dr. Shaffer
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
5,652internists in Illinois1,980internists in Chicago19internists at Ann & Robert H. Lurie Children's Hospital of Chicago
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Jonathan Shaffer billed Medicare for 404 services in 2020
CMS data shows 404 Medicare services from Dr. Shaffer across 8 procedure codes in 2020. Medicare paid $27,713 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 2020404
Paid by Medicare$27,713
Procedure codes8
Dr. Shaffer's Medicare services by type, 2019 to 2020
- 2019
- 2020
- Office and hospital visits
- 2019: 3832020: 4045%
Dr. Shaffer compared with the Illinois median for internists, 2020
- Dr. Shaffer
- Illinois median
- Medicare services
- 404vs 56629% below
- Part D claims
- 68vs 28476% below
Medians across 5,192 internists in Illinois with Dmand AI profiles that report each measure.
Dr. Shaffer'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.
Need commercial claims for Dr. Shaffer?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Shaffer and other internists in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Jonathan Shaffer's patients have a median age of 9
Across all payers, Dmand AI patient panel data puts Dr. Shaffer's median patient age at 9, with 43% women.
Dr. Shaffer's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 9
Patient panel by sex, all payers
- Women43%
- Men56%
Source: Dmand AI Patient Panel Data
Dr. Jonathan Shaffer wrote 68 Medicare Part D claims in 2020
In 2020, Dr. Shaffer wrote 68 Medicare Part D claims. They cover 4 drugs, with $324 in total drug cost. In 2019, CMS named 55 claims across 4 drugs.
Part D claims, 202068
Drugs named by CMS4
Total drug cost$324
Dr. Shaffer'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: 552020: 6824%
Drugs named by CMS: 4 in 2020, 4 in 2019.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Jonathan Shaffer has 7 publications on record
Dmand AI links 7 papers to Dr. Shaffer, published from 2020 to 2025. 2023 was the busiest year, with 2. The most frequent topics are Leadership. Dr. Shaffer's most frequent co-authors are Azra Bihorac, MD, Gene Bukhman, MD, PhD and Leo A. Celi, MD, MPH, MS.
Papers7
Years published2020 to 2025
Dr. Shaffer's papers by year, 2020 to 2025
Topics Dr. Shaffer writes about most
- Leadership
Dr. Shaffer's most frequent co-authors
- Azra Bihorac, MD1 shared paper
- Gene Bukhman, MD, PhD1 shared paper
- Leo A. Celi, MD, MPH, MS1 shared paper
Recent publications by Dr. Shaffer
CurriculumInternship and ResidencyLeadership
See who Dr. Shaffer researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Shaffer 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. Jonathan Shaffer received $450 in industry payments in 2019
CMS Open Payments shows 4 general payments to Dr. Shaffer from 3 drug and device companies in 2019. Food and beverage make up the largest share, 100% of the total. Novartis Pharmaceuticals Corporation paid the most, $210.
Companies that paid Dr. Shaffer the most, 2019 to 2019
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Jonathan Shaffer'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 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 Shaffer
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 Shaffer's NPI number?
Dr. Jonathan Shaffer's NPI number is 1437513173. It was assigned on April 8, 2016, and it is active in the NPI Registry.
What kind of doctor is Dr. Jonathan Shaffer?
Dr. Jonathan Shaffer is an internist in Chicago, Illinois. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Jonathan Shaffer practice?
Dr. Shaffer practices at 225 E Chicago Ave, Box 140, Chicago, IL 60611. Dr. Shaffer's primary practice is Ann & Robert H. Lurie Children's Hospital of Chicago in Chicago, Illinois, part of Ann & Robert H. Lurie Children's Hospital of Chicago. Dmand AI also links Dr. Shaffer to 2 medical groups and 1 clinical lab.
What is Dr. Jonathan Shaffer's office phone number?
The practice phone on file for Dr. Shaffer is (312) 227-4000.
What is Dr. Jonathan Shaffer's medical license number?
Dr. Shaffer holds Wisconsin license 68896.
Which hospitals is Dr. Jonathan Shaffer affiliated with?
Dr. Shaffer practices at Ann & Robert H. Lurie Children's Hospital of Chicago in Chicago, Illinois.
What medical group is Dr. Jonathan Shaffer part of?
Dr. Shaffer is linked to Lurie Children's Medical Group. Dmand AI links Dr. Shaffer to 2 more medical groups.
Does Dr. Jonathan Shaffer accept Medicare?
Yes. CMS data shows Dr. Shaffer billed Medicare for 404 services in 2020.
What services does Dr. Jonathan Shaffer bill to Medicare?
In 2020, Dr. Shaffer's most billed Medicare services were hospital inpatient care (99232), hospital inpatient care (99222) and medical service (99219).
What drugs does Dr. Jonathan Shaffer prescribe most?
In 2020 Medicare Part D data, Dr. Shaffer's most prescribed drugs by claims were Pantoprazole Sodium, Furosemide and Clopidogrel.
Show 4 more questionsShow fewer questions
Has Dr. Jonathan Shaffer received payments from drug or device companies?
CMS Open Payments shows $450 in general payments to Dr. Shaffer from 3 companies from 2019 to 2019. The largest total came from Novartis Pharmaceuticals Corporation.
How long has Dr. Jonathan Shaffer been practicing?
Dr. Shaffer's NPI was assigned in 2016.
Does Dr. Jonathan Shaffer do research?
Dmand AI links 7 publications to Dr. Shaffer, published from 2020 to 2025.
Who does Dr. Jonathan Shaffer publish with?
Dr. Shaffer's most frequent co-authors are Azra Bihorac, MD (1 shared paper), Gene Bukhman, MD, PhD (1 shared paper) and Leo A. Celi, MD, MPH, MS (1 shared paper).
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