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Diane Highum, M.D.
NPI 1396868386 · Psychiatry Physician · Costa Mesa, CA
Diane Highum, M.D. is a Psychiatry Physician provider in Costa Mesa, CA (NPI 1396868386).
Provider details
- NPI number
- 1396868386
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- G68947 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(89/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% 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
301 Victoria St
Costa Mesa, CA 92627-1995
Phone: (949) 642-2734
Street-level locationGet directions
Mailing address
460 South Esplanade St.
Orange, CA 92869-4802
Registry dates
- Enumerated
- 2007-04-06
- Last updated
- 2017-08-29
Frequently asked questions
- What is Diane Highum's NPI number?
- Diane Highum's National Provider Identifier (NPI) is 1396868386, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Diane Highum's specialty?
- Diane Highum is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Diane Highum located?
- Diane Highum's practice location on file with NPPES is 301 Victoria St, Costa Mesa, CA 92627-1995.
- What is Diane Highum's phone number?
- The practice phone number listed in the NPPES registry for Diane Highum is (949) 642-2734.
- Is Diane Highum's NPI active?
- Yes — Diane Highum's NPI (1396868386) is active in the NPPES registry as of the last update on 2017-08-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.