What is Sharon Williams's NPI number?

Sharon Williams's National Provider Identifier (NPI) is 1457772949, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Sharon Williams's specialty?

Sharon Williams is listed in the NPPES registry with a primary specialty of Allergy & Immunology Physician (Allopathic & Osteopathic Physicians).

Where is Sharon Williams located?

Sharon Williams's practice location on file with NPPES is 12231 Newport Ave, North Tustin, CA 92705-3205.

What is Sharon Williams's phone number?

The practice phone number listed in the NPPES registry for Sharon Williams is (949) 519-2311.

Is Sharon Williams's NPI active?

Yes — Sharon Williams's NPI (1457772949) is active in the NPPES registry as of the last update on 2023-03-07.

IndividualActive

Sharon Williams, M.D.

NPI 1457772949 · Allergy & Immunology Physician · North Tustin, CA

Sharon Williams, M.D. is a Allergy & Immunology Physician provider in North Tustin, CA (NPI 1457772949).

Provider details

NPI number: 1457772949
Entity type: Individual
Primary specialty: Allergy & Immunology PhysicianAllopathic & Osteopathic Physicians
Credential: M.D.
Sex: Female
Sole proprietor: Yes
License: A133432 (CA)

Specialties & taxonomies

Allergy & Immunology PhysicianPrimary207K00000XLicense A113432 (CA)
Allopathic & Osteopathic Physicians
Clinical & Laboratory Immunology (Allergy & Immunology) Physician207KI0005XLicense A133432 (CA)
Allopathic & Osteopathic Physicians
Allergy Physician207KA0200XLicense A133432 (CA)
Allopathic & Osteopathic Physicians
Internal Medicine Physician207R00000XLicense A133432 (CA)
Allopathic & Osteopathic Physicians
Allergy & Immunology (Internal Medicine) Physician207RA0201XLicense A133432 (CA)
Allopathic & Osteopathic Physicians
Pediatric Allergy/Immunology Physician

Profile Score

Detailed profile(76/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure38% of score
12 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

12231 Newport Ave

North Tustin, CA 92705-3205

Phone: (949) 519-2311

Fax: (949) 276-3209

Street-level locationGet directions

More CA providers

Mailing address

Po Box 14107

Irvine, CA 92623-4107

Enumerated: 2013-12-30
Last updated: 2023-03-07
Certified: 2023-03-07

Frequently asked questions

What is Sharon Williams's NPI number?: Sharon Williams's National Provider Identifier (NPI) is 1457772949, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is Sharon Williams's specialty?: Sharon Williams is listed in the NPPES registry with a primary specialty of Allergy & Immunology Physician (Allopathic & Osteopathic Physicians).
Where is Sharon Williams located?: Sharon Williams's practice location on file with NPPES is 12231 Newport Ave, North Tustin, CA 92705-3205.
What is Sharon Williams's phone number?: The practice phone number listed in the NPPES registry for Sharon Williams is (949) 519-2311.
Is Sharon Williams's NPI active?: Yes — Sharon Williams's NPI (1457772949) is active in the NPPES registry as of the last update on 2023-03-07.

Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.