Michael Sim, NP
NPI 1619743887 · Family Nurse Practitioner · Pasadena, CA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Michael Sim, NP is a Family Nurse Practitioner provider in Pasadena, CA (NPI 1619743887).
Provider details
- NPI number
- 1619743887
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- NP
- Sex
- Male
- Sole proprietor
- No
- License
- 95027920 (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
2 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- 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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$530 across 19 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
Registry dates
- Enumerated
- 2023-11-29
- Last updated
- 2023-11-29
- Certified
- 2023-11-29
Frequently asked questions
- What is Michael Sim's NPI number?
- Michael Sim's National Provider Identifier (NPI) is 1619743887, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Sim's specialty?
- Michael Sim is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Michael Sim located?
- Michael Sim's practice location on file with NPPES is 100 W California Blvd, Pasadena, CA 91105-3010.
- What is Michael Sim's phone number?
- The practice phone number listed in the NPPES registry for Michael Sim is (626) 397-3959.
- Does Michael Sim accept Medicare?
- Michael Sim is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Michael Sim's NPI active?
- Yes — Michael Sim's NPI (1619743887) is active in the NPPES registry as of the last update on 2023-11-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.