Allison Lloyd-Mclennan, MD
NPI 1639530942 · Dermatology Physician · Palo Alto, CA
Enrolled with Medicare as Practitioner - Dermatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Allison Lloyd-Mclennan, MD is a Dermatology Physician provider in Palo Alto, CA (NPI 1639530942).
Provider details
- NPI number
- 1639530942
- Entity type
- Individual
- Primary specialty
- Dermatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 9282 (NE)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
10 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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 · 2 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Dupilumabbrand: Dupixent Pen | 18 |
| Ketoconazole | 11 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Additional practice locations (1)
- 4014 Leavenworth StOmaha, NE 68105-1026Phone: (858) 248-3232
Registry dates
- Enumerated
- 2016-03-14
- Last updated
- 2026-03-30
- Certified
- 2026-03-30
Frequently asked questions
- What is Allison Lloyd-Mclennan's NPI number?
- Allison Lloyd-Mclennan's National Provider Identifier (NPI) is 1639530942, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Allison Lloyd-Mclennan's specialty?
- Allison Lloyd-Mclennan is listed in the NPPES registry with a primary specialty of Dermatology Physician (Allopathic & Osteopathic Physicians).
- Where is Allison Lloyd-Mclennan located?
- Allison Lloyd-Mclennan's practice location on file with NPPES is 725 Welch Rd, Palo Alto, CA 94304-1601.
- What is Allison Lloyd-Mclennan's phone number?
- The practice phone number listed in the NPPES registry for Allison Lloyd-Mclennan is (650) 497-8000.
- Does Allison Lloyd-Mclennan accept Medicare?
- Allison Lloyd-Mclennan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Allison Lloyd-Mclennan's NPI active?
- Yes — Allison Lloyd-Mclennan's NPI (1639530942) is active in the NPPES registry as of the last update on 2026-03-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.