Registry data as of Aug 27, 2026

Diana Emerson, N.P

Nurse Practitioner · San Mateo, CA

Diana Emerson, N.P is a nurse practitioner with a practice address in San Mateo, California, and NPI 1194836494, issued on Aug 31, 2006. Check the license (California NP5213, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, loaded Aug 27, 2026 · Medicare files 2023 and 2024 · method · Verify with CMS →

NPPES recordas of Aug 27, 2026
1194836494
Name
Diana Emerson
Credential
N.P
Primary taxonomy
Nurse Practitioner 363L00000X
License number
NP5213 CA
Self-reported in NPPES; status is on the state search
Practice location
100 S San Mateo Dr, San Mateo, CA 94401
Phone
(650) 404-8408
Enumerated
Aug 31, 2006
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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Also registered at 100 S San Mateo Dr

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Frederick Adler, M.D.Family Medicine Physician1629030515
  2. Avanti Ambekar, M.D.Neuroradiology Physician1356447627
  3. Mandeep Bajwa, M.D.Family Medicine Physician1891083978
  4. Harriet Borofsky, M.D.Diagnostic Radiology Physician1033162912
  5. Kelly Broderick, M.D.Diagnostic Ultrasound Physician1609821891
  6. Joey CheungRadiological Physics Physician1154256493

Verify Diana Emerson in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich California board licenses this profession
    Search for license NP5213    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
Find the California license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

Statewide context: the Medical Board of California reported 374 disciplinary actions in FY 2022-23. California discipline data →

65% fewer Medicare Part D claims than the average nurse practitioner in 2024

399 Medicare Part D claims for 254 beneficiaries, against an average of 1,144 among the 50,277 providers of this specialty who prescribed in Part D. 27 claims were for opioids.

  1. Diana Emerson399
  2. Specialty average1,144

Most prescribed

  1. Azithromycin35 claims
  2. Cephalexin33 claims
  3. Albuterol Sulfate Hfa29 claims
  4. Ciprofloxacin Hcl21 claims
  5. Amoxicillin-Clavulanate Potass17 claims
  6. Doxycycline Hyclate16 claims

Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.

One hospital or facility affiliation

  1. Cep America - CaliforniaSacramento, CA

Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.

Nurse Practitioner providers in California

There are 7,120 nurse practitioner records in California.

All 7,120 in California → Every provider in San Mateo →

Other nurse practitioner records in California

  1. Barbara Aaronson, RN/NURSE PRACTITONERLos Angeles, CA1588988182
  2. Albert Aba, AGNPSan Francisco, CA1578353777
  3. Venice AbabatColton, CA1083240881
  4. Martha Ababneh, CNAEl Monte, CA1275118614
  5. Chelsea Abad, CRNP, AGPCNP - BCDuarte, CA1952848137
  6. Shayda Abadi, NPPalo Alto, CA1316745540
  7. Jessika Abarca, NPSan Fernando, CA1972263945
  8. Hangama Abassi, N.P.Walnut Creek, CA1487083655
  9. Elizabeth Abaunza, NPSan Francisco, CA1962044347
  10. Honeylynn Abaya, NPMoreno Valley, CA1528799145

Common questions

What is Diana Emerson, N.P's NPI number?

Diana Emerson, N.P's National Provider Identifier (NPI) is 1194836494, issued on Aug 31, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Diana Emerson, N.P located?

The NPPES record lists a practice address at 100 S San Mateo Dr, San Mateo, CA, 94401. Phone: (650) 404-8408. Providers update this record themselves, so call before visiting.

How can I verify Diana Emerson, N.P's license?

NPPES lists California license number NP5213, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.

How much does Diana Emerson, N.P prescribe under Medicare Part D?

In 2024, Diana Emerson, N.P had 399 Medicare Part D claims for 254 beneficiaries; the average among nurse practitioner prescribers was 1,144. Part D covers Medicare prescriptions only.

Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Compiled from official public sources by the editorial process.

Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.