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KEITH R MILLS MD
NPI 1053400598
Internal Medicine - Medical Oncology in New Harbor, ME

Active since October 12, 2006PECOS Enrolled
20 KINGFISHER ROAD, NEW HARBOR, ME 04554(307) 262-5949(844) 320-9753 Get Directions Write a Review

NPPES record last updated: July 7, 2021. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jul 7, 2021, Jul 25, 2018 (2 updates tracked since 2018).

About Keith R Mills Md NPPES

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

KEITH R MILLS MD (NPI 1053400598) is an individual medical oncology provider in New Harbor, Maine, licensed in Wyoming (6639A) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS and maintains a secondary practice location in Klamath Falls.

NPPES Registry Identity

NPI1053400598
Entity TypeIndividualMale
Primary Taxonomy207RX0202X
Provider Legal NameKEITH R MILLSCredential: MD
Location Address20 KINGFISHER ROADNew Harbor, ME 04554
Mailing Address20 Kingfisher RoadNew Harbor, ME 04554 · (307) 262-5949 · Fax (844) 320-9753
Phone(307) 262-5949
Fax(844) 320-9753
Sole ProprietorNo
Enumeration DateOctober 12, 2006
Last NPPES UpdateJuly 7, 20212 updates tracked since enumeration
NPPES CertifiedJuly 7, 2021
✔ NPI 1053400598 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Medical OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RX0202X
Licenses✔ Licensed in WY · 6639A✔ Licensed in OR · CP206749
Definition
An internist who specializes in the diagnosis and treatment of all types of cancer and other benign and malignant tumors. This specialist decides on and administers therapy for these malignancies as well as consults with surgeons and radiotherapists on other treatments for cancer.
20 KINGFISHER ROAD, New Harbor, ME 04554
Open in Google Maps ↗

Secondary Practice Location 1

Location 12610 Uhrmann RdKlamath Falls, OR 97601-1123 · Phone (541) 274-4171

Other Identifiers 1

Medicaid116613100WY

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Keith R 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 Reassignment

Medicare enrollment records show Keith Mills reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Mainegeneral Medical Center
38 mi
General Acute Care Hospital
35 MEDICAL CENTER PARKWAY
Augusta, ME 04330
  • Reassigned Medicare billing, Maine enrollment
  • 978 clinicians in this Medicare group
NPI 1083949184 (207) 872-4454

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 04554 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
$162.77 typical visit price
range $53.26 – $162.77
Typical copayment $40.69 (range $13.31 – $40.69)
Most-billed visit code 99205
Established Patient
$94.60 typical visit price
range $16.90 – $132.79
Typical copayment $23.65 (range $4.22 – $33.19)
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 Keith Mills's NPI number?

The NPI number for Keith Mills is 1053400598. It was assigned to this individual provider in the NPPES registry on October 12, 2006.

Where is Keith Mills located?

Keith Mills practices at 20 Kingfisher Road, New Harbor, ME 04554. The listed phone number is (307) 262-5949.

What is Keith Mills's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Medical Oncology, with taxonomy code 207RX0202X.

Is Keith Mills enrolled in Medicare?

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

Which organization bills Medicare for Keith Mills's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Keith Mills reassigns Medicare benefits to Mainegeneral Medical Center (Augusta, ME). The 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 Keith 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 Keith Mills was last updated on July 7, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.