Daniel Isaac, D.O.
Hematology & Oncology Physician · Grand Rapids, MI
Daniel Isaac, D.O. is a hematology & oncology physician with a practice address in Grand Rapids, Michigan, and NPI 1326486416, issued on Jun 11, 2013. Check the license (Michigan 5101020392, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- Daniel Isaac
- Credential
- D.O.
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- 5101020392 MI
Self-reported in NPPES; status is on the state search - Practice location
- 145 Michigan St NE Ste 2200, Grand Rapids, MI 49503
- Phone
- (616) 486-5933
- Enumerated
- Jun 11, 2013
- Record last updated
- Mar 12, 2026
- Medicare enrollment
- Enrolled (PECOS I20190717000202); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 340 in Michigan → Look up another NPI →
Also registered at 145 Michigan St NE Ste 2200
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Anas Al-Janadi, M.D.Medical Oncology Physician1790727360
- Jamie Albert, NPNurse Practitioner1629516661
- Mohammad Alhyari, MDHematology & Oncology Physician1346554912
- Anna Alperovich, M.D.Internal Medicine Physician1124388269
- Omar Alzarkali, DOHematology & Oncology Physician1346826229
- Maryann AririguzoHematology & Oncology Physician1932801388
Verify Daniel Isaac in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 5101020392Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
20% fewer Medicare Part D claims than the average hematology & oncology physician in 2024
702 Medicare Part D claims for 149 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 37% of claims. 29 claims were for opioids.
Most prescribed
- Anastrozole102 claims
- Xtandi82 claims
- Abiraterone Acetate55 claims
- Letrozole49 claims
- Prednisone40 claims
- Imbruvica34 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: $1,451.33
2 payments; by number, the most common kind was education; the largest payer was Pfizer Inc. The 8,560 providers of this specialty with any payment received $7,481.41 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.
One hospital affiliation
- Mclaren Greater LansingLansing, MI · Acute Care Hospitals3 of 5 stars
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Daniel Isaac among 340 hematology & oncology physician records in Michigan
Daniel Isaac, D.O. is one of 340 hematology & oncology physician records with a practice address in Michigan. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 68% of them.
- NPI issued2013 · 68% of these records are older, 29% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 61% of these records are
- Graduated2013 · median 2004 among the 206 with a school on file
- Record last updated2026 · 52% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology & Oncology Physician providers in Michigan
There are 340 hematology & oncology physician records in Michigan.
All 340 in Michigan → Every provider in Grand Rapids → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Mohammad Alhyari, MDGrand Rapids, MI 495031346554912
- Brett Brinker, MDGrand Rapids, MI 495031750347290
- Sreenivasa Chandana, MDGrand Rapids, MI 495031972705838
- Stephanie Dublis, D.O.Grand Rapids, MI 495031346443769
- Thomas Gribbin, M.D.Grand Rapids, MI 495031639179286
- Colin Hardin, M.D.Grand Rapids, MI 495031639459860
- Timothy O'Rourke, M.D.Grand Rapids, MI 495031215938303
- Erin Pettijohn, M.D.Grand Rapids, MI 495031003101429
Common questions
What is Daniel Isaac, D.O.'s NPI number?
Daniel Isaac, D.O.'s National Provider Identifier (NPI) is 1326486416, issued on Jun 11, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Daniel Isaac, D.O. located?
The NPPES record lists a practice address at 145 Michigan St NE Ste 2200, Grand Rapids, MI, 49503. Phone: (616) 486-5933. Providers update this record themselves, so call before visiting.
How can I verify Daniel Isaac, D.O.'s license?
NPPES lists Michigan license number 5101020392, as entered by the provider. Search the Michigan Board of Medicine (LARA) at https://aca-prod.accela.com/MILARA/GeneralProperty/PropertyLookUp.aspx?isLicensee=Y&TabName=APO. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Daniel Isaac, D.O. prescribe under Medicare Part D?
In 2024, Daniel Isaac, D.O. had 702 Medicare Part D claims for 149 beneficiaries; the average among hematology & oncology physician prescribers was 877. 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.