Jonathan Keffer, MD
General Practice Physician · Ithaca, NY
Jonathan Keffer, MD is a general practice physician with a practice address in Ithaca, New York, and NPI 1447364633, issued on Aug 18, 2006. Check the license (New York 228331, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Jonathan Keffer
- Credential
- MD
- Primary taxonomy
- General Practice Physician 208D00000X
- License number
- 228331 NY
Self-reported in NPPES; status is on the state search - Practice location
- 110 HO Plz, Ithaca, NY 14853
- Phone
- (607) 255-5155
- Enumerated
- Aug 18, 2006
- Record last updated
- Aug 31, 2025
- Entity
- Type 1 · individual
8 nearest general practice physician records → All 681 in New York → Look up another NPI →
Also registered at 110 HO Plz
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Guney AcipayamliPsychiatric/Mental Health Nurse Practitioner1922990522
- Stephanie Agurkis, RNRegistered Nurse1972326783
- Kristin Baker, RNRegistered Nurse1336733880
- Kelly Beaton Riley, NPFamily Nurse Practitioner1679840722
- Karin BelserPsychologist1528575206
- Kent Bullis, MDAdolescent Medicine (Family Medicine) Physician1710079736
Verify Jonathan Keffer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNYS Education Department, Office of the Professions
Search for license 228331Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The practice group's MIPS final score for 2023 (Medicare payment program): 76.5 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $34.25
2 payments; by number, the most common kind was food and beverage; the largest payer was Boston Scientific Corporation. The 4,259 providers of this specialty with any payment received $1,273.40 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Jonathan Keffer among 681 general practice physician records in New York
Jonathan Keffer, MD is one of 681 general practice physician records with a practice address in New York. 49% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 4% of them.
- NPI issued2006 · 4% of these records are older, 75% newer
- In a Medicare fileYes · 49% of these records are
- In the CMS Doctors and Clinicians fileNo · 21% of these records are
- Record last updated2025 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208D00000X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
General Practice Physician providers in New York
There are 681 general practice physician records in New York.
All 681 in New York → Every provider in Ithaca → General Practice Physician nationwide →
The 8 general practice physician records with the nearest ZIP codes
- Heidi Wilson, M.D.Horseheads, NY 148451659486520
- Amechi Odife, MDCorning, NY 148301679787154
- Shern Hart, M.D.Trumansburg, NY 148861255333688
- Marc Immerman, M.D.Elmira, NY 149011417967712
- Robert NovakElmira, NY 149051023638152
- Robert Berke, M.D.Westfield, NY 147871720057599
- Russell Elwell, M.D.Westfield, NY 147871245269364
- Paul Lee, M.D.Randolph, NY 147721790993509
Common questions
What is Jonathan Keffer, MD's NPI number?
Jonathan Keffer, MD's National Provider Identifier (NPI) is 1447364633, issued on Aug 18, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Jonathan Keffer, MD located?
The NPPES record lists a practice address at 110 HO Plz, Ithaca, NY, 14853. Phone: (607) 255-5155. Providers update this record themselves, so call before visiting.
How can I verify Jonathan Keffer, MD's license?
NPPES lists New York license number 228331, as entered by the provider. Search the NYS Education Department, Office of the Professions at https://www.op.nysed.gov/services/verifications/online-verification-searches. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
What is Jonathan Keffer, MD's MIPS final score?
The 2023 MIPS final score is 76.5 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.