Matthew Justin Orenstein, PA
Physician Assistant · Knoxville, TN
Matthew Justin Orenstein, PA is a physician assistant with a practice address in Knoxville, Tennessee, and NPI 1396497442, issued on Jan 20, 2022. Check the license (Tennessee 4957, as entered in NPPES) with the Tennessee board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Matthew Justin Orenstein
- Credential
- PA
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- 4957 TN
Self-reported in NPPES; status is on the state search - Practice location
- 9015 Ten Mile RD Apt 149, Knoxville, TN 37923
- Phone
- (605) 209-7246
- Enumerated
- Jan 20, 2022
- Record last updated
- Jun 11, 2025
- Medicare enrollment
- Enrolled (PECOS I20250728001262); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 3,055 in Tennessee → Look up another NPI →
Verify Matthew Justin Orenstein in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Tennessee board licenses this profession
Search for license 4957Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
92% fewer Medicare Part D claims than the average physician assistant in 2024
65 Medicare Part D claims for 51 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. 12 claims were for opioids.
Most prescribed
- Meloxicam18 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 91.5 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Monument Health Rapid City Hospital IncRapid City, SD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Matthew Justin Orenstein among 3,055 physician assistant records in Tennessee
Matthew Justin Orenstein, PA is one of 3,055 physician assistant records with a practice address in Tennessee. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2022, is newer than 67% of them.
- NPI issued2022 · 67% of these records are older, 26% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2021 · median 2019 among the 2,030 with a school on file
- Record last updated2025 · 30% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a Tennessee practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
399 physician assistant records list a practice address in Knoxville
They are 399 of the 14,339 NPPES records with a practice address in Knoxville, and 3,055 physician assistant records in Tennessee.
All 3,055 in Tennessee → Every provider in Knoxville → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Lorie Bateman, PA-CKnoxville, TN 379231982734117
- Walter Blankenship, P.A.Knoxville, TN 379231528008547
- Lauree Cameron, PAKnoxville, TN 379231487807384
- Keri Fisher, PA-CKnoxville, TN 379231508856931
- Ashley Greene, PA-CKnoxville, TN 379231811916612
- Joshua Hawkins, PA-CKnoxville, TN 379231942532460
- Krista Hodges, PA CKnoxville, TN 379231457434227
- Casey Johnson, PA-CKnoxville, TN 379231093054033
Common questions
What is Matthew Justin Orenstein, PA's NPI number?
Matthew Justin Orenstein, PA's National Provider Identifier (NPI) is 1396497442, issued on Jan 20, 2022. An NPI identifies a provider in billing; it is not a license.
Where is Matthew Justin Orenstein, PA located?
The NPPES record lists a practice address at 9015 Ten Mile RD Apt 149, Knoxville, TN, 37923. Phone: (605) 209-7246. Providers update this record themselves, so call before visiting.
How can I verify Matthew Justin Orenstein, PA's license?
NPPES lists Tennessee license number 4957, as entered by the provider. Search the Tennessee board that licenses this profession; the NPPES record confirms identity only.
How much does Matthew Justin Orenstein, PA prescribe under Medicare Part D?
In 2024, Matthew Justin Orenstein, PA had 65 Medicare Part D claims for 51 beneficiaries; the average among physician assistant prescribers was 830. Part D covers Medicare prescriptions only.
What is Matthew Justin Orenstein, PA's MIPS final score?
The 2023 MIPS final score is 91.5 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.