William Longton, MD
NPI 1275625204 · Anesthesiology Physician · Walnut Creek, CA
Enrolled with Medicare as Practitioner - Pain Management · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Longton, MD is a Anesthesiology Physician provider in Walnut Creek, CA (NPI 1275625204).
Provider details
- NPI number
- 1275625204
- Entity type
- Individual
- Primary specialty
- Anesthesiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- G71946 (CA)
Specialties & taxonomies
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
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
6,755 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 2,320 | $161 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 901 | $115 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 520 | $19 |
| Care Management Services for Behavioral Health Conditions, 20 Minutes Or More Clinical Staff Time Directed By Health Care Professional99484 | 417 | $69 |
| Testing for Presence of Drug, By Chemistry Analyzers80307 | 363 | $60 |
| Administration of Psychological Or Neuropsychological Test By Technician, First 30 Minutes96138 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 22 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 167 | 60 |
| Gabapentin | 78 | 31 |
| Pregabalin | 46 | 13 |
| Oxycodone Hcl | 45 | 16 |
| Oxycodone Hcl/Acetaminophenbrand: Oxycodone-Acetaminophen | 43 | 14 |
| Tramadol Hcl | 35 | 14 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$239 across 6 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
- 2006-09-28
- Last updated
- 2016-06-16
Frequently asked questions
- What is William Longton's NPI number?
- William Longton's National Provider Identifier (NPI) is 1275625204, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Longton's specialty?
- William Longton is listed in the NPPES registry with a primary specialty of Anesthesiology Physician (Allopathic & Osteopathic Physicians).
- Where is William Longton located?
- William Longton's practice location on file with NPPES is 1601 Ygnacio Valley Rd, Walnut Creek, CA 94598-3122.
- What is William Longton's phone number?
- The practice phone number listed in the NPPES registry for William Longton is (925) 939-3000.
- Does William Longton accept Medicare?
- William Longton is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Longton's NPI active?
- Yes — William Longton's NPI (1275625204) is active in the NPPES registry as of the last update on 2016-06-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.