Jeffrey I. Grass, MD
Radiation Oncology Physician · Fairfield, OH
Jeffrey I. Grass, MD is a radiation oncology physician with a practice address in Fairfield, Ohio, and NPI 1275574535, issued on Jun 9, 2006. Check the license (Ohio 35-071641, as entered in NPPES) on the State Medical Board of Ohio; the Medicare figures below come from public CMS files.
- Name
- Jeffrey I. Grass
- Credential
- MD
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License numbers
- 35-071641 OH
37561 KY
Self-reported in NPPES; status is on the state search - Practice location
- 2960 Mack RD Ste 105, Fairfield, OH 45014
- Phone
- (513) 751-2273
- Enumerated
- Jun 9, 2006
- Record last updated
- Apr 22, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicaid IDs
- 2230697 OH
200833060 IN
7100002030 KY - Medicare enrollment
- Enrolled (PECOS I20050323001056); accepts Medicare assignment
- Medical or professional school
- University Of Pittsburgh School Of Medicine, 1995
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 298 in Ohio → Look up another NPI →
Also registered at 2960 Mack RD Ste 105
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Imran Chowdhury, MDRadiation Oncology Physician1891224317
- Michael Cross, MDRadiation Oncology Physician1023001823
Verify Jeffrey I. Grass in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersState Medical Board of Ohio
Search for license 35-071641Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
43% more Medicare Part D claims than the average radiation oncology physician in 2024
192 Medicare Part D claims for 85 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims. 12 claims were for opioids.
Most prescribed
- Tamsulosin Hcl108 claims
- Dexamethasone20 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.
Industry payments in 2024: $2,582.06
24 payments; by number, the most common kind was food and beverage; the largest payer was Siemens Medical Solutions USA, Inc. The 3,275 providers of this specialty with any payment received $1,897.85 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.
Bills Medicare through 2 group practices
- Oncology Hematology Care IncFairfield, OH
- Tri State Urologic Services Psc IncBlue Ash, OH
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jeffrey I. Grass among 298 radiation oncology physician records in Ohio
Jeffrey I. Grass, MD is one of 298 radiation oncology physician records with a practice address in Ohio. 83% 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 17% of them.
- NPI issued2006 · 17% of these records are older, 58% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 76% of these records are
- Graduated1995 · median 2008 among the 226 with a school on file
- Record last updated2021 · 50% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0001X and a Ohio practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Radiation Oncology Physician providers in Ohio
There are 298 radiation oncology physician records in Ohio.
All 298 in Ohio → Every provider in Fairfield → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Imran Chowdhury, MDFairfield, OH 450141891224317
- Michael Cross, MDFairfield, OH 450141023001823
- Peter Fried, MDFairfield, OH 450141851384671
- Jessica Wobb, M.D.Hamilton, OH 450131356653984
- Tasneem Kaleem, MDFairfield Township, OH 450111790197325
- Praveena Cheruvu, MDMiddletown, OH 450051033300215
- Ryan Steinmetz, MDMiddletown, OH 450051902007651
- Rajanish Singla, M.D.Mason, OH 450401689745119
Common questions
What is Jeffrey I. Grass, MD's NPI number?
Jeffrey I. Grass, MD's National Provider Identifier (NPI) is 1275574535, issued on Jun 9, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Jeffrey I. Grass, MD located?
The NPPES record lists a practice address at 2960 Mack RD Ste 105, Fairfield, OH, 45014. Phone: (513) 751-2273. Providers update this record themselves, so call before visiting.
How can I verify Jeffrey I. Grass, MD's license?
NPPES lists Ohio license number 35-071641, as entered by the provider. Search the State Medical Board of Ohio at https://elicense.ohio.gov/oh_verifylicense. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Jeffrey I. Grass, MD prescribe under Medicare Part D?
In 2024, Jeffrey I. Grass, MD had 192 Medicare Part D claims for 85 beneficiaries; the average among radiation oncology physician prescribers was 134. 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.