Mary Y. Klein, M.D.
Hematology & Oncology Physician · Valparaiso, IN
Mary Y. Klein, M.D. is a hematology & oncology physician with a practice address in Valparaiso, Indiana, and NPI 1518966589, issued on Jul 20, 2005. Check the license (Indiana 01034294, as entered in NPPES) on the Medical Licensing Board of Indiana; the Medicare figures below come from public CMS files.
- Name
- Mary Y. Klein
- Credential
- M.D.
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- 01034294 IN
Self-reported in NPPES; status is on the state search - Practice location
- 85 E US Highway 6 Ste 200, Valparaiso, IN 46383
- Phone
- (219) 983-6260
- Enumerated
- Jul 20, 2005
- Record last updated
- Sep 11, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (219) 983-6010
- Medicaid ID
- 100209090 IN
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 245 in Indiana → Look up another NPI →
Also registered at 85 E US Highway 6 Ste 200
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jennifer Aversano, FNPFamily Nurse Practitioner1568109254
- Tareq Braik, M.D.Hematology & Oncology Physician1508174376
Verify Mary Y. Klein in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Licensing Board of Indiana
Search for license 01034294Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
1% fewer Medicare Part D claims than the average hematology & oncology physician in 2024
864 Medicare Part D claims for 191 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 33% of claims. 58 claims were for opioids.
Most prescribed
- Eliquis108 claims
- Anastrozole103 claims
- Xarelto80 claims
- Warfarin Sodium59 claims
- Potassium Chloride43 claims
- Hydrocodone-Acetaminophen32 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 MIPS final score for 2023 (Medicare payment program): 88 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $34.33
2 payments; by number, the most common kind was food and beverage; the largest payer was E.R. Squibb & Sons, L.L.C. 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.
Mary Y. Klein among 245 hematology & oncology physician records in Indiana
Mary Y. Klein, M.D. is one of 245 hematology & oncology physician records with a practice address in Indiana. 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 87% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileNo · 72% of these records are
- Record last updated2020 · 40% 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 Indiana 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 Indiana
There are 245 hematology & oncology physician records in Indiana.
All 245 in Indiana → Every provider in Valparaiso → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Tareq Braik, M.D.Valparaiso, IN 463831508174376
- Olusola Ogundipe, M.D.Valparaiso, IN 463831194849901
- George Sloan, M.D.Valparaiso, IN 463831124097993
- Sami Atassi, MDMichigan City, IN 463601801830534
- William Bae, MDMichigan City, IN 463601538699079
- Meshaal KhanMichigan City, IN 463601538510474
- Sanjiv Modi, MDMichigan City, IN 463601396730909
- Bharat Barai, M.D.Merrillville, IN 464101649257650
Common questions
What is Mary Y. Klein, M.D.'s NPI number?
Mary Y. Klein, M.D.'s National Provider Identifier (NPI) is 1518966589, issued on Jul 20, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Mary Y. Klein, M.D. located?
The NPPES record lists a practice address at 85 E US Highway 6 Ste 200, Valparaiso, IN, 46383. Phone: (219) 983-6260. Providers update this record themselves, so call before visiting.
How can I verify Mary Y. Klein, M.D.'s license?
NPPES lists Indiana license number 01034294, as entered by the provider. Search the Medical Licensing Board of Indiana at https://www.in.gov/pla/professions/physicians-home/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mary Y. Klein, M.D. prescribe under Medicare Part D?
In 2024, Mary Y. Klein, M.D. had 864 Medicare Part D claims for 191 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.
What is Mary Y. Klein, M.D.'s MIPS final score?
The 2023 MIPS final score is 88 of 100. 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.