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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. DIANNA LYNN PHARES PHD, DNP, APRN-BC
NPI 1922335769
Nurse Practitioner - Psychiatric/Mental Health in Weldon Spring, MO

Active since November 16, 2009PECOS Enrolled
4605 CROSSHAVEN CT, WELDON SPRING, MO 63304(314) 503-4052(636) 498-6666 Get Directions Write a Review

NPPES record last updated: July 27, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Jul 27, 2026, Jan 26, 2026, Dec 16, 2025 and 1 more (4 updates tracked since 2019).

About Dr. Dianna Lynn Phares Phd, Dnp, Aprn-bc NPPES

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

DR. DIANNA LYNN PHARES PHD, DNP, APRN-BC (NPI 1922335769) is an individual psychiatric/mental health provider in Weldon Spring, Missouri, licensed in Missouri (137634) and active in the NPI registry since November 2009. She is enrolled in Medicare PECOS, maintains 4 additional practice locations, and is a graduate of University Of Tennessee, Hsc, College Of Medicine (2008).

NPPES Registry Identity

NPI1922335769
Entity TypeIndividualFemale
Primary Taxonomy363LP0808X
Provider Legal NameDR. DIANNA LYNN PHARESCredential: PHD, DNP, APRN-BC
Location Address4605 CROSSHAVEN CTWeldon Spring, MO 63304-0500
Mailing Address4605 Crosshaven CtWeldon Spring, MO 63304-0500 · (314) 503-4052 · Fax (636) 498-6666
Phone(314) 503-4052
Fax(636) 498-6666
Sole ProprietorYes
Medical School CMSUniversity Of Tennessee, Hsc, College Of MedicineGraduated 2008
Enumeration DateNovember 16, 2009
Last NPPES UpdateJuly 27, 20264 updates tracked since enumeration
NPPES CertifiedJuly 27, 2026
✔ NPI 1922335769 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 MO · 137634
Also ListedNurse Practitioner · FamilyTaxonomy 363LF0000X · License 137634 (MO)
4605 CROSSHAVEN CT, Weldon Spring, MO 63304
Open in Google Maps ↗

Secondary Practice Locations 4

Location 1141 Communication DrHannibal, MO 63401-3670 · Phone (573) 603-1460 · Fax (573) 603-1462
Location 21 Healthcare PlBowling Green, MO 63334-3602 · Phone (573) 603-1460 · Fax (573) 603-1462
Location 3235 Progress RdHannibal, MO 63401-6637 · Phone (573) 603-1460
Location 44066 Dunnica AveSaint Louis, MO 63116-3510 · Phone (636) 224-1700

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arkansas Health & Wellness, Ambetter from Home State Health, Ambetter from Sunflower Health Plan and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Dianna Lynn Phares Phd, Dnp, Aprn-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 ID9234472101
PECOS Enrollment IDI20211202000649
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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 63304 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
$86.32 typical visit price
range $55.65 – $169.38
Typical copayment $21.58 (range $13.91 – $42.34)
Most-billed visit code 99203
Established Patient
$98.37 typical visit price
range $17.76 – $137.92
Typical copayment $24.59 (range $4.44 – $34.48)
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.

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 Dianna Phares's NPI number?

The NPI number for Dianna Phares is 1922335769. It was assigned to this individual provider in the NPPES registry on November 16, 2009.

Where is Dianna Phares located?

Dianna Phares practices at 4605 Crosshaven Ct, Weldon Spring, MO 63304. The listed phone number is (314) 503-4052.

What is Dianna Phares's specialty?

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

Is Dianna Phares enrolled in Medicare?

Yes. Dianna Phares 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.

What insurance does Dianna Phares accept?

Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from Arkansas Health & Wellness, Ambetter from Home State Health and Ambetter from Sunflower Health Plan and 5 other insurers list Dianna Phares 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 Dianna Phares was last updated on July 27, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 days 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.