Dr. Robert Edwin Exten , MD
Internal Medicine - Hematology • Lima, OH
803 W Market St Ste 200
Lima, OH 458052796
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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Dr. Robert Exten is listed in NPPES under Internal Medicine - Hematology.
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NPI assigned on June 23, 2005; this date does not establish years in practice.
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Published CMS data list 167 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 99214 — Established patient outpatient office visit: 72 service units.
- 99214 — Established patient outpatient office visit: 31 service units.
- 99213 — Established patient outpatient office visit: 26 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPT® only copyright 2023 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2024). CPT notice
See all 5 records in the table · Guide: How to read Medicare Part B data
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Published CMS data list 289 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Abiraterone Acetate — 53 prescription fills, including refills.
- Prednisone — 39 prescription fills, including refills.
- Letrozole — 34 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 13 records in the table · Guide: How to read Medicare Part D prescriber data
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Fewer Medicare Part B services than 80% of clinicians listed under Internal Medicine - Hematology in Ohio (2024, 67 clinicians with data). Median for this group: 298. Middle half: 188 to 535.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 1,133 in 2020 to 167 in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020–2024.
Practice Location & Contact Primary Location
803 W Market St Ste 200
Lima, OH 458052796
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
NPPES lists 1 additional practice-address record in Washington Court House, OH. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
Ohio State University College Of Medicine
1975
What Public CMS Data Show
Internal Medicine - Hematology: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
89 people with Original Medicare in 2024
It gives a sense of how many people with Medicare this clinician treated that year.
Source: CMS, Medicare Physician & Other Practitioners – by Provider, 2024.
Medicare-allowed amount
About $17,876 in 2024
The total amount Medicare approved for these services in 2024. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.
It shows the total cost of this clinician's Original Medicare services under Medicare's fee rules.
What this does not show: Medicare-allowed amount
This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024.
Paid by Medicare
About $14,214 in 2024
The part of the Medicare-allowed amount that Medicare itself paid in 2024, after patients' deductibles and coinsurance.
The gap between the allowed amount and this number is roughly what patients and their other insurance paid.
What this does not show: Paid by Medicare
This is not the clinician's income and not a measure of quality.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024.
30-day fills
363 standardized 30-day fills in 2024
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$520,419 in 2024
The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024.
Open Payments general payments, program year 2025
All general payments: $30.98 across 2 records.
By nature of payment
- Food and Beverage: $30.98 across 2 records.
Reporting-company totals
- Legend Biotech USA Inc.: $17.23 across 1 record.
- Caris MPI, Inc.: $13.75 across 1 record.
A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.
Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).
Years since graduation
51 years (graduated 1975)
CMS Doctors and Clinicians data list 1975 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File.
NPI first issued
2005
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Accepts Medicare assignment
CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, “Does your provider accept Medicare as full payment?”
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Dr. Exten has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Dr. Exten as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Lima and Ohio
Billing and prescribing volume is not a quality rating.
Medicare Part B services
Fewer Medicare Part B services than 80% of clinicians listed under Internal Medicine - Hematology in Ohio (2024, 67 clinicians with data). Median for this group: 298. Middle half: 188 to 535.
Too few clinicians listed under Internal Medicine - Hematology in Lima have Medicare Part B data for 2024 to compare.
Medicare-allowed amount
A lower Medicare-allowed amount than 80% of clinicians listed under Internal Medicine - Hematology in Ohio (2024, 67 clinicians with data). Median for this group: $29,644. Middle half: $19,881 to $48,808.
Too few clinicians listed under Internal Medicine - Hematology in Lima have Medicare Part B data for 2024 to compare.
Paid by Medicare
A lower Medicare payment amount than 75% of clinicians listed under Internal Medicine - Hematology in Ohio (2024, 67 clinicians with data). Median for this group: $22,789. Middle half: $15,829 to $36,184.
Too few clinicians listed under Internal Medicine - Hematology in Lima have Medicare Part B data for 2024 to compare.
Medicare Part D prescriptions
More Part D prescriptions than 70% of clinicians listed under Internal Medicine - Hematology in Ohio (2024, 58 clinicians with data). Median for this group: 137. Middle half: 49 to 321.
Too few clinicians listed under Internal Medicine - Hematology in Lima have Medicare Part D data for 2024 to compare.
Part D drug cost
A lower Part D drug cost than 60% of clinicians listed under Internal Medicine - Hematology in Ohio (2024, 58 clinicians with data). Median for this group: $945,495. Middle half: $199,404 to $2,396,185.
Too few clinicians listed under Internal Medicine - Hematology in Lima have Medicare Part D data for 2024 to compare.
1 active clinicians are listed under Internal Medicine - Hematology with a practice address in Lima, OH (89 in Ohio).
Addresses are self-reported to NPPES and may be out of date.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part B services
Medicare Part B services decreased 85% from 1,133 in 2020 to 167 in 2024.
- 2020: 1,133
- 2021: 952
- 2022: 376
- 2023: 405
- 2024: 167
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Medicare-allowed amount
Medicare-allowed amount decreased 83% from $104,952 in 2020 to $17,876 in 2024.
- 2020: $104,952
- 2021: $103,796
- 2022: $40,799
- 2023: $43,118
- 2024: $17,876
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Paid by Medicare
Paid by Medicare decreased 82% from $78,039 in 2020 to $14,214 in 2024.
- 2020: $78,039
- 2021: $80,758
- 2022: $30,264
- 2023: $30,003
- 2024: $14,214
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Medicare Part D prescriptions
Medicare Part D prescriptions decreased 74% from 1,105 in 2020 to 289 in 2024.
- 2020: 1,105
- 2021: 889
- 2022: 199
- 2023: 427
- 2024: 289
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30-day fills
30-day fills decreased 75% from 1,429 in 2020 to 363 in 2024.
- 2020: 1,429
- 2021: 1,235
- 2022: 260
- 2023: 565
- 2024: 363
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Part D drug cost
Part D drug cost decreased 82% from $2,874,150 in 2020 to $520,419 in 2024.
- 2020: $2,874,150
- 2021: $2,172,532
- 2022: $667,910
- 2023: $694,908
- 2024: $520,419
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $17.66 in 2019 to $30.98 in 2025.
- 2019: $17.66
- 2021: $13.86
- 2023: $119.44
- 2024: $29.03
- 2025: $30.98
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2025 (payments made January 1 – December 31, 2025): fewer than 11 records totaling $30.98.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Legend Biotech USA Inc. |
Food and Beverage
In-kind items and services
|
CARVYKTI | General | $17.23 |
| Caris MPI, Inc. |
Food and Beverage
In-kind items and services
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MI CANCER SEEK | General | $13.75 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Performed Procedures & Service Volume
CPT® is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016–2023 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners – by Provider and Service data, 2017–2024; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.
| HCPCS Code | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
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99214
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
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72 | 34 | $181.75 | $121.76 |
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99214
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
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31 | 19 | $114.00 | $96.11 |
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99213
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
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26 | 21 | $129.35 | $84.29 |
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99213
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
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21 | 18 | $80.00 | $65.19 |
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99204
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more
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17 | 17 | $253.53 | $151.15 |
Source: CMS Part B by Provider and Service, 2024; services under 11 beneficiaries omitted by CMS. Privacy limits
Submitted charges are billed amounts, not a price quote for your visit.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Abiraterone Acetate | Abiraterone Acetate | 53 | 1,590 | $67,567.83 | — |
| Prednisone | Prednisone | 39 | 1,372 | $196.63 | 11 |
| Letrozole | Letrozole | 34 | 1,680 | $446.96 | 13 |
| Lidocaine-Prilocaine | Lidocaine/Prilocaine | 23 | 645 | $228.12 | 13 |
| Ondansetron Odt | Ondansetron | 21 | 354 | $307.59 | — |
| Hydroxyurea | Hydroxyurea | 21 | 1,018 | $252.34 | — |
| Jakafi | Ruxolitinib Phosphate | 17 | 465 | $224,461.23 | — |
| Omeprazole | Omeprazole | 15 | 930 | $178.81 | — |
| Xtandi | Enzalutamide | 15 | 450 | $213,695.53 | — |
| Xarelto | Rivaroxaban | 13 | 690 | $12,575.28 | — |
| Pantoprazole Sodium | Pantoprazole Sodium | 13 | 390 | $94.02 | — |
| Loperamide | Loperamide Hcl | 13 | 257 | $374.74 | — |
| Gabapentin | Gabapentin | 12 | 525 | $40.31 | — |
Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2023-08-21NUCC Taxonomy Code: 207RH0000X
An internist with additional training who specializes in diseases of the blood, spleen and lymph. This specialist treats conditions such as anemia, clotting disorders, sickle cell disease, hemophilia, leukemia and lymphoma.
NUCC Taxonomy Code: 207RH0003X
An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - HEMATOLOGY/ONCOLOGY
I20060103000850
OH
1850311200
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Secondary Practice Locations
1510 Columbus Ave Ste 130
Washington Court House, OH 431601986
Phone: 7403332878
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Internal Medicine
Doctor of Medicine (M.D.)
Internal Medicine - Hematology & Oncology
Doctor of Medicine (M.D.)
Internal Medicine - Hematology & Oncology
Doctor of Medicine (M.D.)
Nurse Practitioner - Acute Care
Certified Nurse Practitioner
Internal Medicine - Hematology & Oncology
Doctor of Medicine (M.D.)
Nurse Practitioner - Family
Certified Nurse Practitioner
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 803 W MARKET ST STE 200, LIMA, OH 458052796 (Tel: 4192223737)
NPI status registered as active in NPPES database
Registered at 475 LEXINGTON AVE, MANSFIELD, OH 449071501 (Tel: 4197562003)
Registered at 475 LEXINGTON AVE, MANSFIELD, OH 449071501 (Tel: 4197562003)
Recorded as ROBERT EXTEN, MD
Internal Medicine (license number reported to NPPES: OH 35038459E)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Mailing Address
475 Lexington Ave
Mansfield, OH 449071501
Phone: 4197562003