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DR. WILLIAM W HARLESS M.D. PHD.
NPI 1528100948
Internal Medicine - Medical Oncology in Charleston, WV

Active since February 13, 2007PECOS Enrolled
3415 MACCORKLE AVE SE, CHARLESTON, WV 25304(304) 388-4949 Get Directions Write a Review

NPPES record last updated: June 8, 2026. Verified against the NPPES registry weekly; last sync: November 08, 2026.

Record update history: Feb 6, 2026, Dec 28, 2021, Apr 20, 2021 and 2 more (5 updates tracked since 2018).

About Dr. William W Harless M.d. Phd. NPPES

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

DR. WILLIAM W HARLESS M.D. PHD. (NPI 1528100948) is an individual medical oncology provider in Charleston, West Virginia, licensed in West Virginia (21423) and active in the NPI registry since February 2007. He is enrolled in Medicare PECOS, is affiliated with Community Hospitals And Wellness Centers, and maintains 4 additional practice locations.

NPPES Registry Identity

NPI1528100948
Entity TypeIndividualMale
Primary Taxonomy207RX0202X
Provider Legal NameDR. WILLIAM W HARLESSCredential: M.D. PHD.
Location Address3415 MACCORKLE AVE SECharleston, WV 25304-1334
Mailing Address1400 Afflink Pl Ste 101Tuscaloosa, AL 35406-2452 · (205) 366-9740 · Fax (205) 344-9992
Phone(304) 388-4949
Sole ProprietorYes
Medical School CMSOtherGraduated 1996
Enumeration DateFebruary 13, 2007
Last NPPES UpdateJune 8, 20265 updates tracked since enumeration
NPPES CertifiedJune 8, 2026
✔ NPI 1528100948 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyInternal Medicine · Medical OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RX0202X
Licenses✔ Licensed in WV · 21423✔ Licensed in ME · MD23392✔ Licensed in OH · 35C.003724✔ Licensed in CT · 62961
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.
Also ListedSpecialistTaxonomy 174400000X · License 37144 (AL)
Also ListedInternal Medicine · Hematology & OncologyTaxonomy 207RH0003X · License MD23392 (ME)
3415 MACCORKLE AVE SE, Charleston, WV 25304
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Secondary Practice Locations 4

Location 1116 Northport Ave Ste 112Belfast, ME 04915-6096 · Phone (207) 505-4163 · Fax (207) 613-2570
Location 26 Glen Cove DrRockport, ME 04856-4272 · Phone (207) 921-8969 · Fax (207) 910-4407
Location 3433 W High StBryan, OH 43506-1690 · Phone (419) 630-2291 · Fax (419) 630-2181
Location 43860 Teays Valley Rd Ste 5Hurricane, WV 25526-9772 · Phone (304) 388-4949

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield, Avera Health Plans, Harvard Pilgrim Health Care and more.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. William W Harless M.d. Phd. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID1254439664
PECOS Enrollment IDI20260309001520
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

3

Medicare enrollment records show William Harless reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Charleston Area Medical Center, Inc.
2.0 mi
Orthopaedic Surgery
415 MORRIS ST STE 400
Charleston, WV 25301
  • Reassigned Medicare billing, West Virginia enrollment
  • 1,511 clinicians in this Medicare group
NPI 1750166898 (304) 344-3551
Day Kimball Healthcare, Inc.
569 mi
Community Health
320 POMFRET ST
Putnam, CT 06260
  • Reassigned Medicare billing, Connecticut enrollment
  • 56 clinicians in this Medicare group
NPI 1265540967 (860) 928-6541
Northern Maine Medical Center
902 mi
Critical Access
194 EAST MAIN STREET
Fort Kent, ME 04743
  • Reassigned Medicare billing, Maine enrollment
  • 121 clinicians in this Medicare group
NPI 1568465144 (207) 834-3155

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

Areas of Expertise CMS Part B claims 4

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
58 services40 patients
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
42 services34 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
27 services26 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
21 services20 patients

Hospital Affiliations CMS Care Compare 3

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Community Hospitals And Wellness Centers

Acute Care Hospitals · Bryan, OH
3/5 CMS rating
OwnershipVoluntary non-profit - Other
CMS Certification Number360121
Location433 West High StreetBryan, OH 43506 · Williams County
Birthing friendly

Community Hospitals And Wellness Centers

Critical Access Hospitals · Montpelier, OH
OwnershipVoluntary non-profit - Private
CMS Certification Number361327
Location909 East Snyder AvenueMontpelier, OH 43543 · Williams County
Emergency services

Charleston Area Medical Center

Acute Care Hospitals · Charleston, WV
1/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number510022
Location501 Morris StreetCharleston, WV 25301 · Kanawha County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 25304 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
$164.59 typical visit price
range $53.20 – $164.59
Typical copayment $41.14 (range $13.30 – $41.14)
Most-billed visit code 99205
Established Patient
$94.81 typical visit price
range $16.47 – $133.29
Typical copayment $23.70 (range $4.11 – $33.32)
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.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. MUHAMMAD ABDALLA AWIDI MD
Internal Medicine (Hematology & Oncology)
3415 MACCORKLE AVE SE
CHARLESTON, WV 25304
Kanawha County (304) 388-8380
MRS. MEGAN KAYE VINEYARD
Nurse Practitioner (Family)
3415 MACCORKLE AVE SE
CHARLESTON, WV 25304
Kanawha County (304) 388-8380
MS. LEAH CHRISTINE ATKINSON APRN-CNP
Nurse Practitioner (Family)
3415 MACCORKLE AVE SE
CHARLESTON, WV 25304
Kanawha County (304) 388-8380
NICHOLAS CAVENDER PHARMD
Pharmacist
3415 MACCORKLE AVE SE
CHARLESTON, WV 25304
Kanawha County (304) 388-9700
CHLOE RAMPONE APRN-CNP
Nurse Practitioner (Family)
3415 MACCORKLE AVE SE
CHARLESTON, WV 25304
Kanawha County (304) 388-8380
CHARLESTON AREA MEDICAL CENTER, INC.
Pharmacy (Community/Retail Pharmacy)
3415 MACCORKLE AVE SE
CHARLESTON, WV 25304
Kanawha County (304) 388-9700
MRS. MARIE BEAUMONT ZWICK CFNP
Nurse Practitioner (Family)
3415 MACCORKLE AVE SE
CHARLESTON, WV 25304
Kanawha County (304) 388-1790
BILLIE JO THOMAS
Nurse Practitioner (Family)
3415 MACCORKLE AVE SE
CHARLESTON, WV 25304
Kanawha County (304) 388-8380

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 Harless's NPI number?

The NPI number for William Harless is 1528100948. It was assigned to this individual provider in the NPPES registry on February 13, 2007.

Where is William Harless located?

William Harless practices at 3415 Maccorkle Ave SE, Charleston, WV 25304. The listed phone number is (304) 388-4949.

What is William Harless's specialty?

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

Is William Harless enrolled in Medicare?

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

Which organizations bill Medicare for William Harless's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Harless reassigns Medicare benefits to 3 organizations: Charleston Area Medical Center, Inc. (Charleston, WV), Day Kimball Healthcare, Inc. (Putnam, CT) and Northern Maine Medical Center (Fort Kent, ME). 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 Harless's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does William Harless accept?

Health plans from Anthem Blue Cross and Blue Shield, Avera Health Plans, Harvard Pilgrim Health Care and Highmark Blue Cross Blue Shield West Virginia list William Harless as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is William Harless affiliated with any hospitals?

According to CMS data, William Harless is affiliated with Community Hospitals And Wellness Centers and Charleston Area Medical Center.

When was this NPI record last updated?

The NPPES record for William Harless was last updated on June 8, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 months 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.