Irma Tan
NPI 1427454255 · Family Nurse Practitioner · San Monica, CA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Irma Tan is a Family Nurse Practitioner provider in San Monica, CA (NPI 1427454255).
Provider details
- NPI number
- 1427454255
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Sex
- Female
- Sole proprietor
- No
- License
- 95001459 (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 tenure33% of score
11 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
2 documented practice locations
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 31 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 1,836 | 259 |
| Gabapentin | 1,262 | 214 |
| Lidocaine | 789 | 187 |
| Tizanidine Hcl | 692 | 123 |
| Diclofenac Sodium | 551 | 176 |
| Naloxone Hcl | 542 | 187 |
| Cyclobenzaprine Hcl | 436 | 85 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$980 across 44 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 2010 East Firts St.Suite 100Santa Ana, CA 92705Phone: (714) 556-7246Fax: (714) 556-7247
Registry dates
- Enumerated
- 2014-11-05
- Last updated
- 2018-07-19
Frequently asked questions
- What is Irma Tan's NPI number?
- Irma Tan's National Provider Identifier (NPI) is 1427454255, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Irma Tan's specialty?
- Irma Tan is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Irma Tan located?
- Irma Tan's practice location on file with NPPES is 1250 16th Street, San Monica, CA 90731.
- What is Irma Tan's phone number?
- The practice phone number listed in the NPPES registry for Irma Tan is (424) 333-2251.
- Does Irma Tan accept Medicare?
- Irma Tan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Irma Tan's NPI active?
- Yes — Irma Tan's NPI (1427454255) is active in the NPPES registry as of the last update on 2018-07-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.