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GREGORY MARSHALL FNP-C
NPI 1528555216
Pain Medicine - Interventional Pain Medicine in Evansville, IN

Active since April 18, 2018PECOS EnrolledAccepts Medicare Assignment
4411 WASHINGTON AVE STE 100, EVANSVILLE, IN 47714(812) 437-7246 Get Directions Write a Review

NPPES record last updated: December 1, 2025. Verified against the NPPES registry weekly; last sync: November 08, 2026.

Record update history: Dec 1, 2025, Oct 6, 2020, Aug 3, 2020 and 1 more (4 updates tracked since 2018).

About Gregory Marshall Fnp-c NPPES

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

GREGORY MARSHALL FNP-C (NPI 1528555216) is an individual interventional pain medicine provider in Evansville, Indiana, licensed in Indiana (71007920A) and active in the NPI registry since April 2018. He is enrolled in Medicare PECOS and is a graduate of Indiana University School Of Medicine (2017).

NPPES Registry Identity

NPI1528555216
Entity TypeIndividualMale
Primary Taxonomy208VP0014X
Provider Legal NameGREGORY MARSHALLCredential: FNP-C
Location Address4411 WASHINGTON AVE STE 100Evansville, IN 47714-0805
Mailing Address29943 Network PlChicago, IL 60673-1299 · (317) 726-7246 · Fax (317) 706-3417
Phone(812) 437-7246
Sole ProprietorNo
Medical School CMSIndiana University School Of MedicineGraduated 2017
Enumeration DateApril 18, 2018
Last NPPES UpdateDecember 1, 20254 updates tracked since enumeration
NPPES CertifiedDecember 1, 2025
✔ NPI 1528555216 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyPain Medicine · Interventional Pain MedicineAllopathic & Osteopathic Physicians
Taxonomy Code208VP0014X
License✔ Licensed in IN · 71007920A
Definition
Interventional Pain Medicine is the discipline of medicine devoted to the diagnosis and treatment of pain and related disorders principally with the application of interventional techniques in managing subacute, chronic, persistent, and intractable pain, independently or in conjunction with other modalities of treatment.
Also ListedNurse PractitionerTaxonomy 363L00000X · License 28207276A (IN)
Also ListedNurse Practitioner · FamilyTaxonomy 363LF0000X · License 28207276A (IN)
4411 WASHINGTON AVE STE 100, Evansville, IN 47714
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Other Identifiers 1

Medicaid30006626IN

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Buckeye Health Plan, Ambetter from Meridian, Ambetter Health 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

Gregory Marshall Fnp-c 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 ID3577826668
PECOS Enrollment IDI20180425000614
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 Gregory Marshall reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Shadeland Anesthesia & Pain Associates Inc.
153 mi
Interventional Pain Medicine
8805 N MERIDIAN ST
Indianapolis, IN 46260
  • Reassigned Medicare billing, Indiana enrollment
  • 52 clinicians in this Medicare group
NPI 1477589000 (317) 706-7246

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 2

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 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.
423 services104 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
124 services67 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 47714 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
$122.49 typical visit price
range $53.07 – $161.76
Typical copayment $30.62 (range $13.26 – $40.44)
Most-billed visit code 99204
Established Patient
$94.22 typical visit price
range $16.93 – $132.22
Typical copayment $23.55 (range $4.23 – $33.05)
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 3

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

INDIANA PAIN CENTERS-EVANSVILLE LLC
Clinic/Center (Ambulatory Surgical)
4411 WASHINGTON AVE STE 100
EVANSVILLE, IN 47714
Vanderburgh County (317) 706-7246
MRS. JAMIE R TRUELOVE NP
Nurse Practitioner
4411 WASHINGTON AVE STE 100
EVANSVILLE, IN 47714
Vanderburgh County (812) 437-7246
INDIANA SPINE & PAIN INSTITUTE PC
Pain Medicine (Interventional Pain Medicine)
4411 WASHINGTON AVE STE 100
EVANSVILLE, IN 47714
Vanderburgh County (312) 637-9861

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 Gregory Marshall's NPI number?

The NPI number for Gregory Marshall is 1528555216. It was assigned to this individual provider in the NPPES registry on April 18, 2018.

Where is Gregory Marshall located?

Gregory Marshall practices at 4411 Washington Ave Ste 100, Evansville, IN 47714. The listed phone number is (812) 437-7246.

What is Gregory Marshall's specialty?

The primary specialty registered for this NPI is Pain Medicine, specializing in Interventional Pain Medicine, with taxonomy code 208VP0014X.

Is Gregory Marshall enrolled in Medicare?

Yes. Gregory Marshall 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 organization bills Medicare for Gregory Marshall's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Gregory Marshall reassigns Medicare benefits to Shadeland Anesthesia & Pain Associates Inc. (Indianapolis, IN). 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 Gregory Marshall's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Gregory Marshall accept?

Health plans from Ambetter Health, Ambetter from Buckeye Health Plan, Ambetter from Meridian and Anthem Blue Cross and Blue Shield list Gregory Marshall 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 Gregory Marshall was last updated on December 1, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.