NPPES file of Aug 9, 2026

Kewal K. Mahajan, M.D.

Geriatric Medicine (Internal Medicine) Physician · Oregon, OH

Kewal K. Mahajan, M.D. is a geriatric medicine (internal medicine) physician with a practice address in Oregon, Ohio, and NPI 1245237650, issued on Jun 30, 2005. Check the license (Ohio 35042232, as entered in NPPES) on the State Medical Board of Ohio; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1245237650
Name
Kewal K. Mahajan
Credential
M.D.
Primary taxonomy
Geriatric Medicine (Internal Medicine) Physician 207RG0300X
License number
35042232 OH
Self-reported in NPPES; status is on the state search
Practice location
3841 Navarre Ave, Oregon, OH 43616
Phone
(419) 691-8132
Enumerated
Jun 30, 2005
Record last updated
Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
Fax
(419) 691-2061
Medicare enrollment
Enrolled (PECOS I20100126000218); accepts Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest geriatric medicine (internal medicine) physician records → All 132 in Ohio → Look up another NPI →

Also registered at 3841 Navarre Ave

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Kanika Ahuja, M.D.Internal Medicine Physician1124415781
  2. Marianne Borkosky, CNPFamily Nurse Practitioner1932450392
  3. Nicklaus Carrothers, M.D.Internal Medicine Physician1174268130
  4. Riaz Chaudhary, M.D.Geriatric Medicine (Internal Medicine) Physician1912904236
  5. Puneet Chopra, M.D.Internal Medicine Physician1508200668
  6. Vallabh Dogra, M.D.Internal Medicine Physician1710624036

Verify Kewal K. Mahajan in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersState Medical Board of Ohio
    Search for license 35042232    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Ohio license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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56% more Medicare Part D claims than the average geriatric medicine (internal medicine) physician in 2024

6,620 Medicare Part D claims for 313 beneficiaries, against an average of 4,246 among the 3,116 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims. 51 claims were for opioids.

  1. Kewal Mahajan6,620
  2. Specialty average4,246

Most prescribed

  1. Atorvastatin Calcium477 claims
  2. Amlodipine Besylate264 claims
  3. Levothyroxine Sodium224 claims
  4. Eliquis218 claims
  5. Lisinopril161 claims
  6. Gabapentin151 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: $18.51

1 payment: food and beverage; the largest payer was Abbvie Inc. The 1,004 providers of this specialty with any payment received $1,720.82 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Kewal Mahajan$18.51
  2. Specialty average$1,720.82

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Bills Medicare through one group practice

  1. Mercy Health Physicians-North LLCToledo, OH

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Kewal K. Mahajan among 132 geriatric medicine (internal medicine) physician records in Ohio

Kewal K. Mahajan, M.D. is one of 132 geriatric medicine (internal medicine) physician records with a practice address in Ohio. 70% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.

  • NPI issued2005 · 0% of these records are older, 86% newer
  • In a Medicare fileYes · 70% of these records are
  • In the CMS Doctors and Clinicians fileYes · 48% of these records are
  • Graduated1970 · median 1999 among the 64 with a school on file
  • Record last updated2007 · 75% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0300X and a Ohio practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Geriatric Medicine (Internal Medicine) Physician providers in Ohio

There are 132 geriatric medicine (internal medicine) physician records in Ohio.

All 132 in Ohio → Every provider in Oregon → Geriatric Medicine (Internal Medicine) Physician nationwide →

The 8 geriatric medicine (internal medicine) physician records with the nearest ZIP codes

  1. Riaz Chaudhary, M.D.Oregon, OH 436161912904236
  2. Anu Garg, MDToledo, OH 436141336316306
  3. Ammar Kayyali, M.D.Toledo, OH 436141205137965
  4. Venkanna Kanna, M.D.Columbus, OH 432351518986728
  5. Salman Ali, M.D.Columbus, OH 432291801066204
  6. Rizwan Ali AwanColumbus, OH 432211508756933
  7. Kavya SreevalsanColumbus, OH 432211407218217
  8. Kathleen Hager, D.O.Columbus, OH 432151255779393

Common questions

What is Kewal K. Mahajan, M.D.'s NPI number?

Kewal K. Mahajan, M.D.'s National Provider Identifier (NPI) is 1245237650, issued on Jun 30, 2005. An NPI identifies a provider in billing; it is not a license.

Where is Kewal K. Mahajan, M.D. located?

The NPPES record lists a practice address at 3841 Navarre Ave, Oregon, OH, 43616. Phone: (419) 691-8132. Providers update this record themselves, so call before visiting.

How can I verify Kewal K. Mahajan, M.D.'s license?

NPPES lists Ohio license number 35042232, 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 Kewal K. Mahajan, M.D. prescribe under Medicare Part D?

In 2024, Kewal K. Mahajan, M.D. had 6,620 Medicare Part D claims for 313 beneficiaries; the average among geriatric medicine (internal medicine) physician prescribers was 4,246. 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.