Marion Tan, DNP
NPI 1427666304 · Adult Health Nurse Practitioner · Long Grove, IL
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marion Tan, DNP is a Adult Health Nurse Practitioner provider in Long Grove, IL (NPI 1427666304).
Provider details
- NPI number
- 1427666304
- Entity type
- Individual
- Primary specialty
- Adult Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- DNP
- Sex
- Male
- Sole proprietor
- No
- License
- 041.456357 (IL)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Nursing Service Providers
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
5 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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 9 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 54 | 28 |
| Levothyroxine Sodium | 22 | — |
| Losartan Potassium | 21 | 13 |
| Amlodipine Besylate | 21 | 13 |
| Metformin Hcl | 16 | — |
| Fluticasone Propionate | 13 | — |
| Lisinopril |
Practice location
Mailing address
Registry dates
- Enumerated
- 2020-07-16
- Last updated
- 2024-09-09
- Certified
- 2024-09-09
Frequently asked questions
- What is Marion Tan's NPI number?
- Marion Tan's National Provider Identifier (NPI) is 1427666304, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marion Tan's specialty?
- Marion Tan is listed in the NPPES registry with a primary specialty of Adult Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Marion Tan located?
- Marion Tan's practice location on file with NPPES is 3880 Salem Lake Dr Ste F, Long Grove, IL 60047-5292.
- What is Marion Tan's phone number?
- The practice phone number listed in the NPPES registry for Marion Tan is (847) 719-2220.
- Does Marion Tan accept Medicare?
- Marion Tan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marion Tan's NPI active?
- Yes — Marion Tan's NPI (1427666304) is active in the NPPES registry as of the last update on 2024-09-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.