Eric Ferguson Elzinga, MD
Internal Medicine Physician · Ithaca, NY
Eric Ferguson Elzinga, MD is an internal medicine physician with a practice address in Ithaca, New York, and NPI 1710621164, issued on Apr 22, 2022. Check the license (New York 338570-01, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Eric Ferguson Elzinga
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 338570-01 NY
Self-reported in NPPES; status is on the state search - Practice location
- 101 Dates Drive, Ithaca, NY 14850
- Phone
- (607) 277-2170
- Enumerated
- Apr 22, 2022
- Record last updated
- Sep 4, 2025
- Medicare enrollment
- Enrolled (PECOS I20251023000339); accepts Medicare assignment
- Entity
- Type 1 · individual
Also registered at 101 Dates Drive
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Eric Ferguson Elzinga 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 338570-01Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
86% fewer Medicare Part D claims than the average internal medicine physician in 2024
444 Medicare Part D claims for 84 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims.
Most prescribed
- Amlodipine Besylate33 claims
- Losartan Potassium21 claims
- Levothyroxine Sodium19 claims
- Omeprazole19 claims
- Atorvastatin Calcium18 claims
- Gabapentin13 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Cayuga Medical Associates PCIthaca, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
57 internal medicine physician records list a practice address in Ithaca
They are 57 of the 2,215 NPPES records with a practice address in Ithaca, and 12,067 internal medicine physician records in New York.
All 57 in Ithaca → All 12,067 in New York → Every provider in Ithaca →
Other internal medicine physician records in New York
- Deborah Aanonsen, D.O.Staten Island, NY1952395717
- Nivedita Aanur, M.D.New York, NY1982833471
- Jay Aaron, MDGreat Neck, NY1245332956
- Ahmad AbadiPoughkeepsie, NY1780258517
- Jamsheed Abadi, MDBrooklyn, NY1477537496
- Antonieta Abarientos, MDNew Rochelle, NY1649285123
- Zurab Abayev, M.D.Brooklyn, NY1841283058
- Ehab Abaza, MDNew York, NY1114507555
- Vaidarshi Abbagoni, MDNew York, NY1871237495
- Muhammad AbbasRichmond Hill, NY1053996587
Common questions
What is Eric Ferguson Elzinga, MD's NPI number?
Eric Ferguson Elzinga, MD's National Provider Identifier (NPI) is 1710621164, issued on Apr 22, 2022. An NPI identifies a provider in billing; it is not a license.
Where is Eric Ferguson Elzinga, MD located?
The NPPES record lists a practice address at 101 Dates Drive, Ithaca, NY, 14850. Phone: (607) 277-2170. Providers update this record themselves, so call before visiting.
How can I verify Eric Ferguson Elzinga, MD's license?
NPPES lists New York license number 338570-01, 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.
How much does Eric Ferguson Elzinga, MD prescribe under Medicare Part D?
In 2024, Eric Ferguson Elzinga, MD had 444 Medicare Part D claims for 84 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
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.