Diana Emerson, N.P
NPI 1194836494 · Nurse Practitioner · San Mateo, CA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Diana Emerson, N.P is a Nurse Practitioner provider in San Mateo, CA (NPI 1194836494).
Provider details
- NPI number
- 1194836494
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- N.P
- Sex
- Female
- Sole proprietor
- No
- License
- NP5213 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
220 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 89 | $93 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 61 | $130 |
| Automated Urinalysis Test81003 | 37 | $2 |
| Detection Test By Multiplex Amplified Probe Technique for Severe Acute Respiratory Syndrome Coronavirus 2 (sars-Cov-2) (covid-19), Influenza Virus Types a and B, and Respiratory Syncytial Virus87637 | 17 | $140 |
| Detection Test By Immunoassay With Direct Visual Observation for Streptococcus, Group a (strep)87880 | 16 | $16 |
Typical Medicare-allowed amounts for these services range $2–$140 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 10 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Azithromycin | 35 | 34 |
| Cephalexin | 33 | 33 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 29 | 25 |
| Ciprofloxacin Hcl | 21 | 21 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 17 | 17 |
| Doxycycline Hyclate | 16 | 16 |
| Fluticasone Propionate | 16 | 13 |
Practice location
Mailing address
Additional practice locations (1)
- 1625 Stockton BlvdSacramento, CA 95816-7097Phone: (916) 262-9108Fax: (916) 262-9109
Registry dates
- Enumerated
- 2006-08-31
- Last updated
- 2025-06-23
- Certified
- 2025-06-23
Frequently asked questions
- What is Diana Emerson's NPI number?
- Diana Emerson's National Provider Identifier (NPI) is 1194836494, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Diana Emerson's specialty?
- Diana Emerson is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Diana Emerson located?
- Diana Emerson's practice location on file with NPPES is 100 S San Mateo Dr, San Mateo, CA 94401-3805.
- What is Diana Emerson's phone number?
- The practice phone number listed in the NPPES registry for Diana Emerson is (650) 404-8408.
- Does Diana Emerson accept Medicare?
- Diana Emerson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Diana Emerson's NPI active?
- Yes — Diana Emerson's NPI (1194836494) is active in the NPPES registry as of the last update on 2025-06-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.