Isaac Paul Humphrey, M.D.
Internal Medicine Physician · Dayton, OH
Isaac Paul Humphrey, M.D. is an internal medicine physician with a practice address in Dayton, Ohio, and NPI 1649357724, issued on Nov 1, 2006. Check the license (Ohio 35.089624, as entered in NPPES) on the State Medical Board of Ohio; the Medicare figures below come from public CMS files.
- Name
- Isaac Paul Humphrey
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 35.089624 OH
OHIO TRAINING OH
Self-reported in NPPES; status is on the state search - Practice location
- 33 W Rahn RD, Dayton, OH 45429
- Phone
- (937) 433-8990
- Enumerated
- Nov 1, 2006
- Record last updated
- May 4, 2017 (not updated in 9 years: call before relying on the address or phone)
- Fax
- (937) 433-8691
- Medicaid ID
- 0096720 OH
- Medicare enrollment
- Enrolled (PECOS I20140217000753); accepts Medicare assignment
- Medical or professional school
- Loyola University Of Chicago, Stritch School Of Medicine, 2005
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 5,277 in Ohio → Look up another NPI →
Also registered at 33 W Rahn RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Isaac Paul Humphrey in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersState Medical Board of Ohio
Search for license 35.089624Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
92% fewer Medicare Part D claims than the average internal medicine physician in 2024
263 Medicare Part D claims for 127 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 18 claims were for opioids.
Most prescribed
- Prednisone20 claims
- Cefuroxime18 claims
- Amlodipine Besylate13 claims
- Furosemide11 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 100 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: $32,777.78
53 payments; by number, the most common kind was food and beverage; the largest payer was Zoll Services LLC (a/k/a Zoll LifeCor Corp). The 50,334 providers of this specialty with any payment received $1,303.06 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 one group practice
- South Dayton Acute Care Consultants, IncDayton, OH
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Isaac Paul Humphrey among 5,277 internal medicine physician records in Ohio
Isaac Paul Humphrey, M.D. is one of 5,277 internal medicine physician records with a practice address in Ohio. 81% 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 13% of them.
- NPI issued2006 · 13% of these records are older, 55% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 65% of these records are
- Graduated2005 · median 2006 among the 3,414 with a school on file
- Record last updated2017 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Ohio practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
225 internal medicine physician records list a practice address in Dayton
They are 225 of the 12,431 NPPES records with a practice address in Dayton, and 5,277 internal medicine physician records in Ohio.
All 5,277 in Ohio → Every provider in Dayton → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Malak Adib, MDKettering, OH 454291679538557
- Loveleen Bains, MDDayton, OH 454291265424030
- Kurt Fleagle, M.D.Kettering, OH 454291750382602
- Nancy Liu, MDKettering, OH 454291992706816
- Joseph Mastandrea, D.O.Kettering, OH 454291649262924
- John Mauer, MDKettering, OH 454291407812829
- Jo Pelfrey, M.D.Kettering, OH 454291588665582
- Indu Rao, MDDayton, OH 454291447242045
Common questions
What is Isaac Paul Humphrey, M.D.'s NPI number?
Isaac Paul Humphrey, M.D.'s National Provider Identifier (NPI) is 1649357724, issued on Nov 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Isaac Paul Humphrey, M.D. located?
The NPPES record lists a practice address at 33 W Rahn RD, Dayton, OH, 45429. Phone: (937) 433-8990. Providers update this record themselves, so call before visiting.
How can I verify Isaac Paul Humphrey, M.D.'s license?
NPPES lists Ohio license number 35.089624, 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 Isaac Paul Humphrey, M.D. prescribe under Medicare Part D?
In 2024, Isaac Paul Humphrey, M.D. had 263 Medicare Part D claims for 127 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Isaac Paul Humphrey, M.D.'s MIPS final score?
The 2023 MIPS final score is 100 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.