What is William Cassel's NPI number?

William Cassel's National Provider Identifier (NPI) is 1689640450, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is William Cassel's specialty?

William Cassel is listed in the NPPES registry with a primary specialty of Surgery Physician (Allopathic & Osteopathic Physicians).

Where is William Cassel located?

William Cassel's practice location on file with NPPES is 2525 W University Ave, Muncie, IN 47303-3421.

What is William Cassel's phone number?

The practice phone number listed in the NPPES registry for William Cassel is (765) 289-6381.

Does William Cassel accept Medicare?

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

Is William Cassel's NPI active?

Yes — William Cassel's NPI (1689640450) is active in the NPPES registry as of the last update on 2020-12-28.

IndividualActiveAccepts Medicare

William Cassel, MD

NPI 1689640450 · Surgery Physician · Muncie, IN

William Cassel, MD is a Surgery Physician provider in Muncie, IN (NPI 1689640450).

Provider details

NPI number: 1689640450
Entity type: Individual
Primary specialty: Surgery PhysicianAllopathic & Osteopathic Physicians
Credential: MD
Sex: Male
Sole proprietor: No
License: 01047731A (IN)

Practice location

2525 W University Ave

Suite 403

Muncie, IN 47303-3421

Phone: (765) 289-6381

Fax: (765) 281-2620

Street-level locationGet directions

Mailing address

1200 W White River Blvd

Muncie, IN 47303-4988

Specialties & taxonomies

Surgery PhysicianPrimary208600000XLicense 01047731A (IN)
Allopathic & Osteopathic Physicians

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

Profile Score

Detailed profile(94/100 index)

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

Registry tenure25% of score
20 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
679 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213	164	$84
Ultrasound of Both Sides of Head and Neck Blood Flow93880	104	$35
Ultrasound Study of One Arm Or Leg Veins With Compression and Maneuvers93971	77	$20
Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231	57	$46
Ultrasound Study of Arm Or Leg Veins With Compression and Maneuvers93970	51	$30
Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223	49

What this provider prescribes (Medicare Part D)

Top drugs by Medicare Part D claim volume, 2024 · 3 distinct drugs on file.

Drug	Part D claims (2024)	Beneficiaries
Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen	24	22
Clopidogrel Bisulfatebrand: Clopidogrel	20	—
Cilostazol	14	—

Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do not include cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.

Transparency — industry payments

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

$181 across 2 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: 2006-02-23
Last updated: 2020-12-28
Certified: 2020-12-28

Frequently asked questions

What is William Cassel's NPI number?: William Cassel's National Provider Identifier (NPI) is 1689640450, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is William Cassel's specialty?: William Cassel is listed in the NPPES registry with a primary specialty of Surgery Physician (Allopathic & Osteopathic Physicians).
Where is William Cassel located?: William Cassel's practice location on file with NPPES is 2525 W University Ave, Muncie, IN 47303-3421.
What is William Cassel's phone number?: The practice phone number listed in the NPPES registry for William Cassel is (765) 289-6381.
Does William Cassel accept Medicare?: William Cassel is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
Is William Cassel's NPI active?: Yes — William Cassel's NPI (1689640450) is active in the NPPES registry as of the last update on 2020-12-28.

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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213	164	$84
Ultrasound of Both Sides of Head and Neck Blood Flow93880	104	$35
Ultrasound Study of One Arm Or Leg Veins With Compression and Maneuvers93971	77	$20
Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231	57	$46
Ultrasound Study of Arm Or Leg Veins With Compression and Maneuvers93970	51	$30
Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223	49

What this provider prescribes (Medicare Part D)

Top drugs by Medicare Part D claim volume, 2024 · 3 distinct drugs on file.

Drug	Part D claims (2024)	Beneficiaries
Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen	24	22
Clopidogrel Bisulfatebrand: Clopidogrel	20	—
Cilostazol	14	—

Transparency — industry payments

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

$181 across 2 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