David Lilienstein, MD
NPI 1750571212 · Emergency Medicine Physician · Walnut Creek, CA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
David Lilienstein, MD is a Emergency Medicine Physician provider in Walnut Creek, CA (NPI 1750571212).
Provider details
- NPI number
- 1750571212
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A100009 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
18 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
57 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 39 | $128 |
| Emergency Department Visit With High Level of Medical Decision Making99285 | 18 | $185 |
Typical Medicare-allowed amounts for these services range $128–$185 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote 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 · 9 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Ibuprofen | 44 | 44 |
| Prednisone | 24 | 23 |
| Ondansetronbrand: Ondansetron Odt | 20 | 20 |
| Famotidine | 17 | 13 |
| Oxycodone Hcl | 15 | 15 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 14 | 14 |
| Sulfamethoxazole/Trimethoprimbrand: Sulfamethoxazole-Trimethoprim |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-07-30
- Last updated
- 2021-12-09
Frequently asked questions
- What is David Lilienstein's NPI number?
- David Lilienstein's National Provider Identifier (NPI) is 1750571212, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is David Lilienstein's specialty?
- David Lilienstein is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is David Lilienstein located?
- David Lilienstein's practice location on file with NPPES is 1425 S Main St, Walnut Creek, CA 94596-5318.
- What is David Lilienstein's phone number?
- The practice phone number listed in the NPPES registry for David Lilienstein is (925) 295-6723.
- Does David Lilienstein accept Medicare?
- David Lilienstein is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is David Lilienstein's NPI active?
- Yes — David Lilienstein's NPI (1750571212) is active in the NPPES registry as of the last update on 2021-12-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.