DR. DIANNA LYNN PHARES PHD, DNP, APRN-BC
NPI 1922335769
Nurse Practitioner - Psychiatric/Mental Health in Weldon Spring, MO
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
Specialties & Licenses 2
Secondary Practice Locations 4
Accepted 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
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.
Medicare Billing Reassignments
2Medicare enrollment records show Dianna Phares reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Saint Peters, MO 63376
- Reassigned Medicare billing, Missouri enrollment
- 44 clinicians in this Medicare group
Springfield, MO 65804
- Reassigned Medicare billing, Missouri enrollment
- 590 clinicians in this Medicare group
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 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.
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.
Which organizations bill Medicare for Dianna Phares's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Dianna Phares reassigns Medicare benefits to 2 organizations: Preferred Family Healthcare, Inc. (Saint Peters, MO) and Burrell, Inc. (Springfield, MO). 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 Dianna Phares's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Dianna Phares accept?
Health plans from Anthem Blue Cross and Blue Shield, Medica, Oscar Insurance Company and UnitedHealthcare 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 2 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.
# Dr. Dianna Lynn Phares, PHD, DNP, APRN-BC · NPI 1922335769
Psychiatric/Mental Health physician in Weldon Spring, Missouri. Individual provider, active in the CMS NPPES registry since November 16, 2009.
## Identity
- **NPI:** 1922335769 (Entity type: Individual)
- **Enumerated:** November 16, 2009
- **Primary specialty:** Nurse Practitioner - Psychiatric/Mental Health · taxonomy 363LP0808X
- **State license:** 137634 (Missouri)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 4605 CROSSHAVEN CT, Weldon Spring, MO 63304-0500
- **Phone:** (314) 503-4052 · **Fax:** (636) 498-6666
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Preferred Family Healthcare, Inc. (NPI 1508310632, Saint Peters, MO); Burrell, Inc. (NPI 1275541740, Springfield, MO) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Tennessee, Hsc, College Of Medicine, class of 2008
## Record status
- **NPPES last updated:** July 27, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1922335769) · Data from the CMS NPPES public registry.