Mary Lien, M.D.
NPI 1417016544 · Dermatology Physician · Riverside, CA
Enrolled with Medicare as Practitioner - Dermatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Lien, M.D. is a Dermatology Physician provider in Riverside, CA (NPI 1417016544).
Provider details
- NPI number
- 1417016544
- Entity type
- Individual
- Primary specialty
- Dermatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- ME71253 (FL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
19 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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 24 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Fluorouracil | 456 | 353 |
| Calcipotriene | 383 | 318 |
| Triamcinolone Acetonide | 144 | 102 |
| Tacrolimus | 131 | 83 |
| Clobetasol Propionate | 112 | 63 |
| Ketoconazole | 106 | 65 |
| Mupirocin | 74 | 44 |
| Betamethasone/Propylene Glycbrand: Betamethasone Diprop Augmented | 73 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$86 across 2 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
- 2006-12-06
- Last updated
- 2021-12-02
Frequently asked questions
- What is Mary Lien's NPI number?
- Mary Lien's National Provider Identifier (NPI) is 1417016544, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Lien's specialty?
- Mary Lien is listed in the NPPES registry with a primary specialty of Dermatology Physician (Allopathic & Osteopathic Physicians).
- Where is Mary Lien located?
- Mary Lien's practice location on file with NPPES is 10800 Magnolia Ave, Riverside, CA 92505-3043.
- What is Mary Lien's phone number?
- The practice phone number listed in the NPPES registry for Mary Lien is (951) 353-2000.
- Does Mary Lien accept Medicare?
- Mary Lien is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Lien's NPI active?
- Yes — Mary Lien's NPI (1417016544) is active in the NPPES registry as of the last update on 2021-12-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.