Joshua Knowles, MD
NPI 1538201520 · Cardiovascular Disease Physician · Stanford, CA
Enrolled with Medicare as Practitioner - Cardiovascular Disease (cardiology) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Joshua Knowles, MD is a Cardiovascular Disease Physician provider in Stanford, CA (NPI 1538201520).
Provider details
- NPI number
- 1538201520
- Entity type
- Individual
- Primary specialty
- Cardiovascular Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A87974 (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
19 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
942 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) |
|---|---|---|
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 668 | $9 |
| Heart Rhythm Review and Interpretation of Continous External Ekg Over 8-15 Days93248 | 75 | $29 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 47 | $89 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 42 | $147 |
| Office Or Other Outpatient Visit for the Evaluation and Management of Established Patient That May Not Require Presence of Healthcare Professional99211 | 26 | $31 |
| Hospital Discharge Day Management, 30 Minutes Or Less |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 16 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Evolocumabbrand: Repatha Sureclick | 128 | 24 |
| Atorvastatin Calcium | 93 | 19 |
| Rosuvastatin Calcium | 78 | 23 |
| Ezetimibe | 72 | 28 |
| Alirocumabbrand: Praluent Pen | 72 | 12 |
| Metoprolol Succinate | 62 | 19 |
| Carvedilol | 44 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-02-13
- Last updated
- 2024-04-22
- Certified
- 2024-04-22
Frequently asked questions
- What is Joshua Knowles's NPI number?
- Joshua Knowles's National Provider Identifier (NPI) is 1538201520, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joshua Knowles's specialty?
- Joshua Knowles is listed in the NPPES registry with a primary specialty of Cardiovascular Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Joshua Knowles located?
- Joshua Knowles's practice location on file with NPPES is 300 Pasteur Dr, Stanford, CA 94305-2200.
- What is Joshua Knowles's phone number?
- The practice phone number listed in the NPPES registry for Joshua Knowles is (650) 723-4000.
- Does Joshua Knowles accept Medicare?
- Joshua Knowles is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Joshua Knowles's NPI active?
- Yes — Joshua Knowles's NPI (1538201520) is active in the NPPES registry as of the last update on 2024-04-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.