William Warshal, MD
NPI 1285620666 · Family Medicine Physician · Los Gatos, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Warshal, MD is a Family Medicine Physician provider in Los Gatos, CA (NPI 1285620666).
Provider details
- NPI number
- 1285620666
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- G41468 (CA)
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 tenure28% of score
20 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
1,400 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) |
|---|---|---|
| Subsequent Nursing Facility Care With High Level of Medical Decision Making, Per Day, If Using Time, at Least 45 Minutes99310 | 640 | $178 |
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 398 | $124 |
| Initial Nursing Facility Care With High Level of Medical Decision Making, Per Day, If Using Time, 50 Minutes Or More99306 | 274 | $208 |
| Subsequent Nursing Facility Care With Straightforward Level of Medical Decision Making, Per Day, If Using Time, 20 Minutes Or More99308 | 49 | $87 |
| Initial Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 35 Minutes99305 | 39 | $153 |
Typical Medicare-allowed amounts for these services range $87–$208 (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 · 40 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Amlodipine Besylate | 161 |
| Metoprolol Tartrate | 108 |
| Atorvastatin Calcium | 92 |
| Losartan Potassium | 86 |
| Levothyroxine Sodium | 77 |
| Gabapentin | 70 |
| Tamsulosin Hcl | 48 |
| Famotidine | 44 |
| Hydralazine Hcl | 40 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-09-21
- Last updated
- 2024-05-01
- Certified
- 2024-05-01
Frequently asked questions
- What is William Warshal's NPI number?
- William Warshal's National Provider Identifier (NPI) is 1285620666, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Warshal's specialty?
- William Warshal is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Warshal located?
- William Warshal's practice location on file with NPPES is 15251 National Ave Ste 104, Los Gatos, CA 95032-2400.
- What is William Warshal's phone number?
- The practice phone number listed in the NPPES registry for William Warshal is (408) 605-8612.
- Does William Warshal accept Medicare?
- William Warshal is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Warshal's NPI active?
- Yes — William Warshal's NPI (1285620666) is active in the NPPES registry as of the last update on 2024-05-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.