Dr. Jonathan Keffer, MD
- Medicare services, 2022
- 125
- Part D claims, 2020
- 11
- Industry payments
- $230
- Affiliated sites
- 2
- Medical group
- 1
- Practice address
- 110 Ho Plaza, Ithaca, NY 14853
- Practice phone
- Call (607) 255-5155
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Cornell Health - Ithaca
College / University Student Health · Ithaca, New York
Find Dr. Keffer'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 Keffer is a general practice physician in Ithaca, New York
Dr. Keffer practices at Cornell Health - Ithaca in Ithaca, New York.
Dr. Keffer's NPI, 1447364633, was assigned on August 18, 2006. Dr. Keffer graduated from Rutgers New Jersey Medical School in 2000. Dr. Keffer holds New York license 228331.
- NPI
- 1447364633NPI Registry (opens in a new tab)
- NPI enumeration date
- August 18, 2006
- NPI status
- Active
- Practice phone
- (607) 255-5155
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 52
- Medical school graduation
- 2000
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Jonathan Keffer practices at Cornell Health - Ithaca in Ithaca, New York
Dr. Keffer's primary practice is Cornell Health - Ithaca, at 110 Ho Plaza, Ithaca, NY 14853. The practice phone is (607) 255-5155.
- Cornell Health - Ithaca110 Ho Plaza, Ithaca, NY 14853Phone(607) 255-5155
Source: Dmand AI Affiliation Data
Dr. Jonathan Keffer is affiliated with 2 sites of care and 1 medical group
Dr. Keffer's primary practice is Cornell Health - Ithaca in Ithaca, New York. The medical group on file is Cornell Health. Dmand AI also links Dr. Keffer to 1 more group practice or clinic, named with a free account. Dr. Keffer's employer is on file too: a school & student health.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Jonathan Keffer's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Keffer practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Cornell Health - Ithaca | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Jonathan Keffer is one of 397 general practice physicians in New York
General practice is Dr. Keffer's primary specialty in the NPI Registry, under taxonomy code 208D00000X. Dr. Keffer is licensed in New York.
Specialties and state licenses
- General practice, New YorkPrimary
General practice physicians near Dr. Keffer
Counts of general practice physicians 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 Keffer billed Medicare for 125 services in 2022
CMS data shows 125 Medicare services from Dr. Keffer across 3 procedure codes in 2022. Medicare paid $7,245 for them. Every service was in an office.
Dr. Keffer's Medicare services by type, 2021 to 2022
- 2021
- 2022
- Office and hospital visits
- 2021: 1342022: 6452%
- Lab and pathology
- 2021: 1052022: 6142%
Dr. Keffer compared with the New York median for general practice physicians, 2022
- Dr. Keffer
- New York median
- Medicare services
- 125vs 35665% below
- Part D claims
- 11vs 12691% below
Medians across 362 general practice physicians in New York with Dmand AI profiles that report each measure.
Dr. Keffer's most billed Medicare procedure codes, 2022
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. Keffer and other general practice physicians in New York.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Jonathan Keffer's patients have a median age of 22
Across all payers, Dmand AI patient panel data puts Dr. Keffer's median patient age at 22, with 53% women.
Dr. Keffer's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 22
Patient panel by sex, all payers
- Women53%
- Men46%
Source: Dmand AI Patient Panel Data
Dr. Jonathan Keffer wrote 11 Medicare Part D claims in 2020
In 2020, Dr. Keffer wrote 11 Medicare Part D claims. Every claim was for a generic drug. They cover 1 drug, with $118 in total drug cost. In 2019, CMS named 23 claims across 2 drugs.
Dr. Keffer'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: 232020: 1152%
Drugs named by CMS: 1 in 2020, 2 in 2019.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Jonathan Keffer received $230 in industry payments from 2016 to 2025
CMS Open Payments shows 7 general payments to Dr. Keffer from 6 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Cook Medical LLC paid the most, $116.
General payments to Dr. Keffer by program year, 2016 to 2025
Companies that paid Dr. Keffer 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. Jonathan Keffer graduated from Rutgers New Jersey Medical School
Dr. Keffer graduated from Rutgers New Jersey Medical School in 2000.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Jonathan Keffer'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) |
| 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. Jonathan Keffer
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 Keffer's NPI number?
Dr. Jonathan Keffer's NPI number is 1447364633. It was assigned on August 18, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Jonathan Keffer?
Dr. Jonathan Keffer is a general practice physician in Ithaca, New York. The primary specialty in the NPI Registry is General Practice Physician (taxonomy code 208D00000X).
Where does Dr. Jonathan Keffer practice?
Dr. Keffer practices at 110 Ho Plaza, Ithaca, NY 14853. Dr. Keffer's primary practice is Cornell Health - Ithaca in Ithaca, New York. Dmand AI also links Dr. Keffer to 1 group practice or clinic.
What is Dr. Jonathan Keffer's office phone number?
The practice phone on file for Dr. Keffer is (607) 255-5155.
What is Dr. Jonathan Keffer's medical license number?
Dr. Keffer holds New York license 228331.
What medical group is Dr. Jonathan Keffer part of?
Dr. Keffer is linked to Cornell Health.
Does Dr. Jonathan Keffer accept Medicare?
Yes. CMS data shows Dr. Keffer billed Medicare for 125 services in 2022.
What services does Dr. Jonathan Keffer bill to Medicare?
In 2022, Dr. Keffer's most billed Medicare services were lab and pathology test (87426), office visit, established patient (99213) and office visit, established patient (99212).
Where did Dr. Jonathan Keffer go to medical school?
Dr. Keffer graduated from Rutgers New Jersey Medical School in 2000.
What drugs does Dr. Jonathan Keffer prescribe most?
In 2020 Medicare Part D data, Dr. Keffer's most prescribed drugs by claims were Cefdinir.
Has Dr. Jonathan Keffer received payments from drug or device companies?
CMS Open Payments shows $230 in general payments to Dr. Keffer from 6 companies from 2016 to 2025. The largest total came from Cook Medical LLC.
How long has Dr. Jonathan Keffer been practicing?
Dr. Keffer graduated from medical school in 2000, 26 years ago.
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