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DR. MARK ALLEN MCGRAIL M.D.
NPI 1063488831
Preventive Medicine - Addiction Medicine in Knoxville, TN

Active since February 23, 2006PECOS EnrolledAccepts Medicare Assignment
2018 WESTERN AVE, KNOXVILLE, TN 37921(865) 544-0406(865) 544-0480 Get Directions Write a Review

NPPES record last updated: May 20, 2025. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: May 20, 2025, Apr 10, 2025, Nov 8, 2022 and 4 more (7 updates tracked since 2016).

About Dr. Mark Allen Mcgrail M.d. NPPES

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

DR. MARK ALLEN MCGRAIL M.D. (NPI 1063488831) is an individual addiction medicine provider in Knoxville, Tennessee, licensed in Tennessee (MD30708) and active in the NPI registry since February 2006. He is enrolled in Medicare PECOS, maintains a secondary practice location in Clarksville, and is a graduate of Uniformed Services Uhs Fe Hebert School Of Med (1993).

NPPES Registry Identity

NPI1063488831
Entity TypeIndividualMale
Primary Taxonomy2083A0300X
Provider Legal NameDR. MARK ALLEN MCGRAILCredential: M.D.
Location Address2018 WESTERN AVEKnoxville, TN 37921-5718
Mailing Address1923 Sulphur Springs RdMorristown, TN 37813-5654 · (423) 317-9344 · Fax (423) 714-2355
Phone(865) 544-0406
Fax(865) 544-0480
Sole ProprietorNo
Medical School CMSUniformed Services Uhs Fe Hebert School Of MedGraduated 1993
Enumeration DateFebruary 23, 2006
Last NPPES UpdateMay 20, 20257 updates tracked since enumeration
NPPES CertifiedMay 20, 2025
✔ NPI 1063488831 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyPreventive Medicine · Addiction MedicineAllopathic & Osteopathic Physicians
Taxonomy Code2083A0300X
License✔ Licensed in TN · MD30708
Definition
A physician engaged in the subspecialty practice of Addiction Medicine who specializes in the prevention, evaluation, diagnosis, treatment, and recovery of persons with the disease of addiction.
Also ListedFamily MedicineTaxonomy 207Q00000X · License T8718 (TX)
Also ListedFamily Medicine · Addiction MedicineTaxonomy 207QA0401X · License 0101276467 (VA), MD30708 (TN)
2018 WESTERN AVE, Knoxville, TN 37921
Open in Google Maps ↗

Secondary Practice Location 1

Location 1486 Archie CtClarksville, TN 37043-2027 · Phone (931) 801-5662

Other Identifiers 1

Medicaid3827523TN

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arkansas Health & Wellness, Ambetter Health, Ambetter of Alabama 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 and accepts Medicare assignment

Dr. Mark Allen Mcgrail M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID9931336476
PECOS Enrollment IDI20240828005320
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

2

Medicare enrollment records show Mark Mcgrail reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Cherokee Health Systems
34 mi
Federally Qualified Health Center (FQHC)
6350 W ANDREW JOHNSON HWY
Talbott, TN 37877
  • Reassigned Medicare billing, Tennessee enrollment
  • 257 clinicians in this Medicare group
NPI 1134128820 (423) 587-7337
Recover Together, LLC
79 mi
Adult Mental Health
1501 S MAIN ST STE H
London, KY 40741
  • Reassigned Medicare billing, Tennessee enrollment
  • 27 clinicians in this Medicare group
NPI 1346736758 (606) 401-0482

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 37921 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
$121.80 typical visit price
range $52.64 – $160.89
Typical copayment $30.45 (range $13.16 – $40.22)
Most-billed visit code 99204
Established Patient
$93.60 typical visit price
range $16.72 – $131.41
Typical copayment $23.40 (range $4.18 – $32.85)
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.

KIMBERLY EVANS
Licensed Practical Nurse
2018 WESTERN AVE
KNOXVILLE, TN 37921
Knox County (865) 544-0406
SHELBY PAIGE BUFFIN LCSW
Social Worker
2018 WESTERN AVE
KNOXVILLE, TN 37921
Knox County (865) 544-0406
LACEY ELIZABETH MORGAN-ROPPELT
Technician, Pathology (Phlebotomy)
2018 WESTERN AVE
KNOXVILLE, TN 37921
Knox County (865) 544-0406
MELISSA CAROL ZAYAS RN
Registered Nurse (Psychiatric/Mental Health)
2018 WESTERN AVE
KNOXVILLE, TN 37921
Knox County (865) 544-0406
SARAH GAIL LORD APN
Nurse Practitioner (Psychiatric/Mental Health)
2018 WESTERN AVE
KNOXVILLE, TN 37921
Knox County (865) 544-0406
COLBY SHANE HOWARD BS
Case Manager/Care Coordinator
2018 WESTERN AVE
KNOXVILLE, TN 37921
Knox County (865) 544-0406
MS. JACQUELINE BONSU PH.D.
Psychologist
2018 WESTERN AVE
KNOXVILLE, TN 37921
Knox County (865) 544-0406
AMANDA JEAN MELTON RN
Registered Nurse
2018 WESTERN AVE
KNOXVILLE, TN 37921
Knox County (865) 544-0406

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 Mark Mcgrail's NPI number?

The NPI number for Mark Mcgrail is 1063488831. It was assigned to this individual provider in the NPPES registry on February 23, 2006.

Where is Mark Mcgrail located?

Mark Mcgrail practices at 2018 Western Ave, Knoxville, TN 37921. The listed phone number is (865) 544-0406.

What is Mark Mcgrail's specialty?

The primary specialty registered for this NPI is Preventive Medicine, specializing in Addiction Medicine, with taxonomy code 2083A0300X.

Is Mark Mcgrail enrolled in Medicare?

Yes. Mark Mcgrail is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Mark Mcgrail's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mark Mcgrail reassigns Medicare benefits to 2 organizations: Cherokee Health Systems (Talbott, TN) and Recover Together, LLC (London, KY). 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 Mark Mcgrail's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Mark Mcgrail accept?

Health plans from Ambetter Health, Ambetter from Arkansas Health & Wellness, Ambetter of Alabama, Ambetter of North Carolina and Ambetter of Tennessee and 4 other insurers list Mark Mcgrail 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.

When was this NPI record last updated?

The NPPES record for Mark Mcgrail was last updated on May 20, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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.