What is Katherine Exten's NPI number?

Katherine Exten's National Provider Identifier (NPI) is 1982996237, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Katherine Exten's specialty?

Katherine Exten is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).

Where is Katherine Exten located?

Katherine Exten's practice location on file with NPPES is 335 Glessner Ave, Mansfield, OH 44903-2269.

What is Katherine Exten's phone number?

The practice phone number listed in the NPPES registry for Katherine Exten is (419) 756-2003.

Does Katherine Exten accept Medicare?

Katherine Exten is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.

Is Katherine Exten's NPI active?

Yes — Katherine Exten's NPI (1982996237) is active in the NPPES registry as of the last update on 2022-01-25.

IndividualActiveAccepts Medicare

Katherine Exten, M.D.

NPI 1982996237 · Hematology & Oncology Physician · Mansfield, OH

Katherine Exten, M.D. is a Hematology & Oncology Physician provider in Mansfield, OH (NPI 1982996237).

Provider details

NPI number: 1982996237
Entity type: Individual
Primary specialty: Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
Credential: M.D.
Sex: Female
Sole proprietor: No
License: 036.134806 (IL)

Practice location

335 Glessner Ave

Mansfield, OH 44903-2269

Phone: (419) 756-2003

Street-level locationGet directions

More OH providers

Mailing address

840 S Wood St Ste 820-E

Chicago, IL 60612-4325

Specialties & taxonomies

Hematology & Oncology PhysicianPrimary207RH0003XLicense 35131800 (OH)
Allopathic & Osteopathic Physicians
Internal Medicine Physician207R00000XLicense 036.134806 (IL)
Allopathic & Osteopathic Physicians
Student in an Organized Health Care Education/Training Program390200000X
Student, Health Care

Enrolled with Medicare as Practitioner - Medical Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)

Profile Score

Established profile(66/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure25% of score
15 yrs in NPPES registry
Profile completeness25% of score
100% of core fields populated
Practice footprint15% of score
1 documented practice location
Medicare service volume (vs. specialty peers)25% of score
617 Medicare services, 2024 (ranked within specialty)
Open Payments transparency10% of score
Has Open Payments disclosures (2024)

Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.

What this provider does (Medicare)

Based on Medicare fee-for-service claims, 2024; not all care is captured.

Service (HCPCS)	Medicare services	Typical Medicare-allowed (2024)
Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214	516	$125
Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223	33	$171
New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204	26	$164
Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232	22	$78
Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213	20	$89

Typical Medicare-allowed amounts for these services range $78–$171 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.

What this provider prescribes (Medicare Part D)

Top drugs by Medicare Part D claim volume, 2024 · 41 distinct drugs on file.

Drug	Part D claims (2024)	Beneficiaries
Anastrozole	292	75
Tamoxifen Citrate	161	40
Prochlorperazine Maleate	115	76
Apixabanbrand: Eliquis	108	21
Gabapentin	107	28
Dexamethasone	99	39
Levothyroxine Sodium	97	19

Transparency — industry payments

Based on CMS Open Payments, 2024; not all care is captured.

$72 across 4 records (Open Payments 2024)

Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.

Enumerated: 2011-05-04
Last updated: 2022-01-25

Frequently asked questions

What is Katherine Exten's NPI number?: Katherine Exten's National Provider Identifier (NPI) is 1982996237, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is Katherine Exten's specialty?: Katherine Exten is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
Where is Katherine Exten located?: Katherine Exten's practice location on file with NPPES is 335 Glessner Ave, Mansfield, OH 44903-2269.
What is Katherine Exten's phone number?: The practice phone number listed in the NPPES registry for Katherine Exten is (419) 756-2003.
Does Katherine Exten accept Medicare?: Katherine Exten is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
Is Katherine Exten's NPI active?: Yes — Katherine Exten's NPI (1982996237) is active in the NPPES registry as of the last update on 2022-01-25.

Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.

What this provider does (Medicare)

Based on Medicare fee-for-service claims, 2024; not all care is captured.

Service (HCPCS)	Medicare services	Typical Medicare-allowed (2024)
Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214	516	$125
Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223	33	$171
New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204	26	$164
Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232	22	$78
Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213	20	$89

Drug

Part D claims (2024)

Beneficiaries

Anastrozole

292

Tamoxifen Citrate

161

Prochlorperazine Maleate

115

Apixabanbrand: Eliquis

108

Gabapentin

107

Dexamethasone

Levothyroxine Sodium

Transparency — industry payments

Based on CMS Open Payments, 2024; not all care is captured.

$72 across 4 records (Open Payments 2024)

Provider details

Practice location

Mailing address

Specialties & taxonomies

Profile Score

What this provider does (Medicare)

What this provider prescribes (Medicare Part D)

Transparency — industry payments

Registry dates

Frequently asked questions

Specialties & taxonomies

Frequently asked questions

Profile Score

What this provider does (Medicare)

What this provider prescribes (Medicare Part D)

Transparency — industry payments