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WILLIAM FOWLER MILLS MD
NPI 1427045665
Family Medicine in Olean, NY

Active since October 03, 2005PECOS Enrolled
500 MAIN STREET, OLEAN, NY 14760(716) 375-7500(716) 362-9518 Get Directions Write a Review

NPPES record last updated: March 24, 2008. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About William Fowler Mills Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

WILLIAM FOWLER MILLS MD (NPI 1427045665) is an individual family medicine provider in Olean, New York, licensed in New York (246061) and active in the NPI registry since October 2005. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1427045665
Entity TypeIndividualMale
Primary Taxonomy207Q00000X
Provider Legal NameWILLIAM FOWLER MILLSCredential: MD
Location Address500 MAIN STREETOlean, NY 14760
Mailing Address908 Niagara Falls Blvd, Ste 208N Tonawanda, NY 14120 · (716) 692-2160 · Fax (716) 362-9518
Phone(716) 375-7500
Fax(716) 362-9518
Sole ProprietorNo
Enumeration DateOctober 3, 2005
Last NPPES UpdateMarch 24, 2008
✔ NPI 1427045665 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
Licenses✔ Licensed in NY · 246061✔ Licensed in NJ · MA04643400
Definition
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.
500 MAIN STREET, Olean, NY 14760
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Other Identifiers 6

Other0109938000Amerihealth
Medicare UPIND98867NJ
Medicare ID-Type Unspecified509351PMXNJ · Medicare
Other4248043Aetna Pin
Other10629Aetna/hmo
Medicaid1168304NJ

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

William Fowler Mills Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

6

Medicare enrollment records show William Mills reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Olean General Hospital
Same address
General Practice
500 MAIN ST
Olean, NY 14760
  • Reassigned Medicare billing, New York enrollment
  • 163 clinicians in this Medicare group
NPI 1033499017 (716) 375-6993
Health System Physician PC
0.9 mi
Internal Medicine
401 N 8TH ST
Olean, NY 14760
  • Reassigned Medicare billing, New York enrollment
  • 10 clinicians in this Medicare group
NPI 1649600081 (716) 379-8113
San Xavier District Office
1,913 mi
Public Health or Welfare
2018 W SAN XAVIER RD
Tucson, AZ 85746
  • Reassigned Medicare billing, Texas enrollment
  • Medicare enrollment name: Ton Sells Hospital
  • 349 clinicians in this Medicare group
NPI 1073694832 (520) 295-2503
Ton San Xavier Health Center
1,915 mi
Public Health, Federal
7900 S J STOCK RD
Tucson, AZ 85746
  • Reassigned Medicare billing, Texas enrollment
  • 286 clinicians in this Medicare group
NPI 1437157302 (520) 547-8140
Ton San Simon Health Center
1,963 mi
Health Service
HIGHWAY 86, MILEPOST 84
Sells, AZ 85634
  • Reassigned Medicare billing, Texas enrollment
  • 268 clinicians in this Medicare group
NPI 1588834998 (520) 362-7007
Ton Santa Rosa Health Center
1,963 mi
Public Health, Federal
FEDERAL ROUTE 15, MILEPOST 12
Sells, AZ 85634
  • Reassigned Medicare billing, Texas enrollment
  • 94 clinicians in this Medicare group
NPI 1770581639 (520) 361-2403

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 14760 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$84.93 typical visit price
range $54.87 – $166.88
Typical copayment $21.23 (range $13.71 – $41.72)
Most-billed visit code 99203
Established Patient
$97.08 typical visit price
range $17.54 – $136.14
Typical copayment $24.27 (range $4.38 – $34.03)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is William Mills's NPI number?

The NPI number for William Mills is 1427045665. It was assigned to this individual provider in the NPPES registry on October 3, 2005.

Where is William Mills located?

William Mills practices at 500 Main Street, Olean, NY 14760. The listed phone number is (716) 375-7500.

What is William Mills's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Is William Mills enrolled in Medicare?

Yes. William Mills is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for William Mills's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Mills reassigns Medicare benefits to 6 organizations: Olean General Hospital (Olean, NY), Health System Physician PC (Olean, NY), San Xavier District Office (Tucson, AZ), Ton San Xavier Health Center (Tucson, AZ), Ton San Simon Health Center (Sells, AZ) and 1 more organization, listed in the Medicare section above. Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for William Mills's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for William Mills was last updated on March 24, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.