Diana Parnell, M.D.
NPI 1811926652 · Dermatology Physician · Greenbrae, CA
Enrolled with Medicare as Practitioner - Dermatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Diana Parnell, M.D. is a Dermatology Physician provider in Greenbrae, CA (NPI 1811926652).
Provider details
- NPI number
- 1811926652
- Entity type
- Individual
- Primary specialty
- Dermatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- G185710 (CA)
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 tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
433 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. 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 .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Destruction of Precancer Skin Growth, 2-14 Growths17003 | 202 | $9 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 80 | $109 |
| Destruction of Precancer Skin Growth, 1 Growth17000 | 66 | $79 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 62 | $154 |
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 23 | $70 |
Typical Medicare-allowed amounts for these services range $9–$154 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
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) | Beneficiaries |
|---|---|---|
| Clobetasol Propionate | 15 | 13 |
| Aliskiren Hemifumaratebrand: Aliskiren | 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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,895 across 23 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)
- 1030 Sir Francis Drake Blvd Ste 110Kentfield, CA 94904-1439Phone: (415) 461-1036Fax: (415) 461-1043
Registry dates
- Enumerated
- 2006-07-02
- Last updated
- 2025-01-20
- Certified
- 2025-01-20
Frequently asked questions
- What is Diana Parnell's NPI number?
- Diana Parnell's National Provider Identifier (NPI) is 1811926652, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Diana Parnell's specialty?
- Diana Parnell is listed in the NPPES registry with a primary specialty of Dermatology Physician (Allopathic & Osteopathic Physicians).
- Where is Diana Parnell located?
- Diana Parnell's practice location on file with NPPES is 1100 S Eliseo Dr, Greenbrae, CA 94904-2017.
- What is Diana Parnell's phone number?
- The practice phone number listed in the NPPES registry for Diana Parnell is (415) 461-1036.
- Does Diana Parnell accept Medicare?
- Diana Parnell is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Diana Parnell's NPI active?
- Yes — Diana Parnell's NPI (1811926652) is active in the NPPES registry as of the last update on 2025-01-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.