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DIANA L TOMLIANOVICH PMHNP-BC
NPI 1497288492
Nurse Practitioner - Psychiatric/Mental Health in Mount Vernon, IL

Active since April 06, 2017PECOS EnrolledAccepts Medicare Assignment
95.01/100
CMS Quality Rating
2920 VETERANS MEMORIAL DR, MOUNT VERNON, IL 62864(618) 244-6544(618) 244-6577 Get Directions Write a Review

NPPES record last updated: February 5, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Feb 5, 2026, Feb 10, 2025, Jan 18, 2023 and 4 more (7 updates tracked since 2017).

About Diana L Tomlianovich Pmhnp-bc NPPES

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

DIANA L TOMLIANOVICH PMHNP-BC (NPI 1497288492) is an individual psychiatric/mental health provider in Mount Vernon, Illinois, licensed in Illinois (209.014810) and active in the NPI registry since April 2017. She is enrolled in Medicare PECOS, is affiliated with Ssm Health St Mary's Hospital -centralia, and is a graduate of Other (2016).

NPPES Registry Identity

NPI1497288492
Entity TypeIndividualFemale
Primary Taxonomy363LP0808X
Provider Legal NameDIANA L TOMLIANOVICHCredential: PMHNP-BC
Location Address2920 VETERANS MEMORIAL DRMount Vernon, IL 62864-5924
Mailing AddressPo Box 155Christopher, IL 62822-0155 · (618) 724-2401
Phone(618) 244-6544
Fax(618) 244-6577
Sole ProprietorNo
Medical School CMSOtherGraduated 2016
Enumeration DateApril 6, 2017
Last NPPES UpdateFebruary 5, 20267 updates tracked since enumeration
NPPES CertifiedFebruary 5, 2026
✔ NPI 1497288492 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyNurse Practitioner · Psychiatric/Mental HealthPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LP0808X
License✔ Licensed in IL · 209.014810
Also ListedNurse Practitioner · FamilyTaxonomy 363LF0000X · License 209.014810 (IL)
2920 VETERANS MEMORIAL DR, Mount Vernon, IL 62864
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter Health, Ambetter Health of Delaware.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

Diana L Tomlianovich Pmhnp-bc 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 ID1850677352
PECOS Enrollment IDI20170418001522
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 Diana Tomlianovich reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Christopher Greater Area Rural Health Planning Corporation
1.0 mi
Federally Qualified Health Center (FQHC)
4117 S WATER TOWER PL STE D
Mount Vernon, IL 62864
  • Reassigned Medicare billing, Illinois enrollment
  • 60 clinicians in this Medicare group
NPI 1083592604 (618) 242-4848
Community Resource Center Inc.
19 mi
Rehabilitation, Substance Use Disorder
904 EAST MARTIN LUTHER KING DRIVE
Centralia, IL 62801
  • Reassigned Medicare billing, Illinois enrollment
  • 6 clinicians in this Medicare group
NPI 1386605434 (618) 533-1391

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

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.
174 services49 patients

Hospital Affiliations CMS Care Compare

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

Ssm Health St Mary's Hospital -Centralia

Acute Care Hospitals · Centralia, IL
3/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number140034
Location400 North Pleasant AvenueCentralia, IL 62801 · Marion County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 62864 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
$85.71 typical visit price
range $54.80 – $168.44
Typical copayment $21.42 (range $13.70 – $42.11)
Most-billed visit code 99203
Established Patient
$97.25 typical visit price
range $17.16 – $136.56
Typical copayment $24.31 (range $4.29 – $34.14)
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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

95.01/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored through an Alternative Payment Model
Quality80.02
Promoting Interoperability100
Improvement Activities40

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.

JUDY K JENKINS LPN
Licensed Practical Nurse
2920 VETERANS MEMORIAL DR
MOUNT VERNON, IL 62864
Jefferson County (618) 244-6544
STACY OWENS LPN
Licensed Practical Nurse
2920 VETERANS MEMORIAL DR
MOUNT VERNON, IL 62864
Jefferson County (618) 244-6544
RONDA KAYE WILSON LPN
Licensed Practical Nurse
2920 VETERANS MEMORIAL DR
MOUNT VERNON, IL 62864
Jefferson County (618) 244-6544
R JEANETTE WANGLER LPN
Licensed Practical Nurse
2920 VETERANS MEMORIAL DR
MOUNT VERNON, IL 62864
Jefferson County (618) 244-6544
OLIVIA NANETTE DALMASSO LPN
Registered Nurse
2920 VETERANS MEMORIAL DR
MOUNT VERNON, IL 62864
Jefferson County (618) 244-6544
STACY WITHROW RN
Registered Nurse
2920 VETERANS MEMORIAL DR
MOUNT VERNON, IL 62864
Jefferson County (618) 244-6544
NAOMI D EASLEY LPN
Licensed Practical Nurse
2920 VETERANS MEMORIAL DR
MOUNT VERNON, IL 62864
Jefferson County (618) 244-6544
AMY JO JENKINS LPN
Licensed Practical Nurse
2920 VETERANS MEMORIAL DR
MOUNT VERNON, IL 62864
Jefferson County (618) 244-6544

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 Diana Tomlianovich's NPI number?

The NPI number for Diana Tomlianovich is 1497288492. It was assigned to this individual provider in the NPPES registry on April 6, 2017.

Where is Diana Tomlianovich located?

Diana Tomlianovich practices at 2920 Veterans Memorial Dr, Mount Vernon, IL 62864. The listed phone number is (618) 244-6544.

What is Diana Tomlianovich's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Psychiatric/Mental Health, with taxonomy code 363LP0808X.

Is Diana Tomlianovich enrolled in Medicare?

Yes. Diana Tomlianovich 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 Diana Tomlianovich's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Diana Tomlianovich reassigns Medicare benefits to 2 organizations: Christopher Greater Area Rural Health Planning Corporation (Mount Vernon, IL) and Community Resource Center Inc. (Centralia, IL). 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 Diana Tomlianovich's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Diana Tomlianovich accept?

Health plans from Ambetter Health and Ambetter Health of Delaware list Diana Tomlianovich 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 Diana Tomlianovich affiliated with any hospitals?

According to CMS data, Diana Tomlianovich is affiliated with Ssm Health St Mary's Hospital -Centralia.

When was this NPI record last updated?

The NPPES record for Diana Tomlianovich was last updated on February 5, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.