Tyler Johnson, M.D.
NPI 1689945362 · Medical Oncology Physician · Stanford, CA
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Tyler Johnson, M.D. is a Medical Oncology Physician provider in Stanford, CA (NPI 1689945362).
Provider details
- NPI number
- 1689945362
- Entity type
- Individual
- Primary specialty
- Medical Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- A114397 (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
14 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
491 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 221 | $216 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 137 | $134 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 42 | $163 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 36 | $155 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 30 | $89 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 4 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Loperamide Hclbrand: Loperamide | 16 |
| Potassium Chloride | 15 |
| Ondansetron Hcl | 13 |
| Prochlorperazine Maleate | 11 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Additional practice locations (1)
- 875 Blake Wilbur DrPalo Alto, CA 94304-2205Phone: (650) 498-6000
Registry dates
- Enumerated
- 2012-01-26
- Last updated
- 2024-04-25
- Certified
- 2024-04-25
Frequently asked questions
- What is Tyler Johnson's NPI number?
- Tyler Johnson's National Provider Identifier (NPI) is 1689945362, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tyler Johnson's specialty?
- Tyler Johnson is listed in the NPPES registry with a primary specialty of Medical Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Tyler Johnson located?
- Tyler Johnson's practice location on file with NPPES is 300 Pasteur Dr, Stanford, CA 94305-2200.
- What is Tyler Johnson's phone number?
- The practice phone number listed in the NPPES registry for Tyler Johnson is (650) 723-4000.
- Does Tyler Johnson accept Medicare?
- Tyler Johnson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Tyler Johnson's NPI active?
- Yes — Tyler Johnson's NPI (1689945362) is active in the NPPES registry as of the last update on 2024-04-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.