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PATRICK JAMES MASTIN MD
NPI 1811251655
Internal Medicine - Rheumatology in Knoxville, TN

Active since June 26, 2012PECOS Enrolled
8975 EXECUTIVE PARK DR STE 200, KNOXVILLE, TN 37923(865) 691-4100(833) 908-2116 Get Directions Write a Review

NPPES record last updated: July 20, 2021. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Jul 20, 2021, Feb 10, 2021, Feb 9, 2016 (3 updates tracked since 2016).

About Patrick James Mastin Md NPPES

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

PATRICK JAMES MASTIN MD (NPI 1811251655) is an individual rheumatology provider in Knoxville, Tennessee, licensed in Tennessee (51030) and active in the NPI registry since June 2012. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1811251655
Entity TypeIndividualMale
Primary Taxonomy207RR0500X
Provider Legal NamePATRICK JAMES MASTINCredential: MD
Location Address8975 EXECUTIVE PARK DR STE 200Knoxville, TN 37923-4727
Mailing Address1275 Dick Lonas Rd Unit 101Knoxville, TN 37909-1383 · (865) 584-4747
Phone(865) 691-4100
Fax(833) 908-2116
Sole ProprietorNo
Enumeration DateJune 26, 2012
Last NPPES UpdateJuly 20, 20213 updates tracked since enumeration
NPPES CertifiedJuly 20, 2021
✔ NPI 1811251655 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · RheumatologyAllopathic & Osteopathic Physicians
Taxonomy Code207RR0500X
License✔ Licensed in TN · 51030
Definition
An internist who treats diseases of joints, muscle, bones and tendons. This specialist diagnoses and treats arthritis, back pain, muscle strains, common athletic injuries and collagen diseases.
8975 EXECUTIVE PARK DR STE 200, Knoxville, TN 37923
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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Patrick James Mastin 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 Patrick Mastin reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Summit Medical Group, PLLC
Same address
Rheumatology
8975 EXECUTIVE PARK DR, SUITE 200
Knoxville, TN 37923
  • Reassigned Medicare billing, Tennessee enrollment
  • 1,003 clinicians in this Medicare group
NPI 1053480004 (865) 691-4100

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 37923 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 4

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

TIFFANY A STEELMAN FNP
Nurse Practitioner
8975 EXECUTIVE PARK DR STE 200
KNOXVILLE, TN 37923
Knox County (865) 691-4100
ARSHITA D PATEL DO
Psychiatry & Neurology (Neurology)
8975 EXECUTIVE PARK DR STE 200
KNOXVILLE, TN 37923
Knox County (865) 691-4100
ARTICULARIS RHEUMATOLOGY SPECIALISTS OF TENNESSEE PLLC
Internal Medicine (Rheumatology)
8975 EXECUTIVE PARK DR STE 200
KNOXVILLE, TN 37923
Knox County (843) 793-6980
SARAH STEPHENSON FNP-BC
Nurse Practitioner (Family)
8975 EXECUTIVE PARK DR STE 200
KNOXVILLE, TN 37923
Knox County (865) 691-4100

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 Patrick Mastin's NPI number?

The NPI number for Patrick Mastin is 1811251655. It was assigned to this individual provider in the NPPES registry on June 26, 2012.

Where is Patrick Mastin located?

Patrick Mastin practices at 8975 Executive Park Dr Ste 200, Knoxville, TN 37923. The listed phone number is (865) 691-4100.

What is Patrick Mastin's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Rheumatology, with taxonomy code 207RR0500X.

Is Patrick Mastin enrolled in Medicare?

Yes. Patrick Mastin is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Patrick Mastin's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Patrick Mastin reassigns Medicare benefits to Summit Medical Group, PLLC (Knoxville, TN). 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 Patrick Mastin'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 Patrick Mastin was last updated on July 20, 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.