John Turns, MD
NPI 1942371588 · Family Medicine Physician · Castro Valley, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Turns, MD is a Family Medicine Physician provider in Castro Valley, CA (NPI 1942371588).
Provider details
- NPI number
- 1942371588
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- G044402 (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
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
8,268 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 Straightforward Level of Medical Decision Making, Per Day, If Using Time, 20 Minutes Or More99308 | 6,938 | $73 |
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 455 | $105 |
| Test to Measure Expiratory Airflow and Volume Changes Before and After Medication Administration94060 | 250 | $48 |
| Test to Determine Lung Volumes Using Sensors94726 | 250 | $69 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 86 | $101 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 103 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 413 | 56 |
| Levothyroxine Sodium | 253 | 24 |
| Divalproex Sodium | 216 | 26 |
| Amlodipine Besylate | 212 | 32 |
| Apixabanbrand: Eliquis | 202 | 16 |
| Ipratropium/Albuterol Sulfatebrand: Ipratropium-Albuterol | 187 | 50 |
| Metformin Hcl |
Practice location
Mailing address
Additional practice locations (1)
- 5601 Norris Canyon RdSuite #140San Ramon, CA 94583Phone: (925) 830-0644Fax: (925) 830-0868
Registry dates
- Enumerated
- 2006-11-13
- Last updated
- 2022-07-21
Frequently asked questions
- What is John Turns's NPI number?
- John Turns's National Provider Identifier (NPI) is 1942371588, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Turns's specialty?
- John Turns is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Turns located?
- John Turns's practice location on file with NPPES is 22101 Redwood Rd, Castro Valley, CA 94546-7107.
- What is John Turns's phone number?
- The practice phone number listed in the NPPES registry for John Turns is (510) 582-0777.
- Does John Turns accept Medicare?
- John Turns is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Turns's NPI active?
- Yes — John Turns's NPI (1942371588) is active in the NPPES registry as of the last update on 2022-07-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.