Melissa Diacon
NPI 1427425594 · Psychiatric/Mental Health Nurse Practitioner · Oklahoma City, OK
Melissa Diacon is a Psychiatric/Mental Health Nurse Practitioner provider in Oklahoma City, OK (NPI 1427425594).
Provider details
- NPI number
- 1427425594
- Entity type
- Individual
- Primary specialty
- Psychiatric/Mental Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Sex
- Female
- Sole proprietor
- Yes
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
- Mental Health Counselor101YM0800X
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
10 yrs in NPPES registry
- Profile completeness38% of score
83% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2015-08-25
- Last updated
- 2026-04-23
- Certified
- 2026-04-23
Frequently asked questions
- What is Melissa Diacon's NPI number?
- Melissa Diacon's National Provider Identifier (NPI) is 1427425594, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Melissa Diacon's specialty?
- Melissa Diacon is listed in the NPPES registry with a primary specialty of Psychiatric/Mental Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Melissa Diacon located?
- Melissa Diacon's practice location on file with NPPES is 4400 N Lincoln Blvd, Oklahoma City, OK 73105-5104.
- What is Melissa Diacon's phone number?
- The practice phone number listed in the NPPES registry for Melissa Diacon is (405) 424-7711.
- Is Melissa Diacon's NPI active?
- Yes — Melissa Diacon's NPI (1427425594) is active in the NPPES registry as of the last update on 2026-04-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.