JOHN WEST DAY (MD) – Neuromuscular Medicine (Psychiatry & Neurology) Physician, NPI 1447291992
Neuromuscular Medicine (Psychiatry & Neurology) Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
2,479 NEUROLOGY in CA
Provider Addresses for JOHN WEST DAY (MD)
725 Welch Rd
Palo Alto, CA 943041601
Phone: (650) 497-8000
Type: Location
1804 Embarcadero Road, Embarcadero Road, Palo Alto, Santa Clara County, California, 94303-3221, United States
STE 100
PALO ALTO, CA 943033341
Phone:
Type: Mailing
300 PASTEUR DR
STANFORD, CA 943052200
Phone: (650) 723-4000
Type: Mailing
Lane Medical Library, 300, Pasteur Drive, Stanford, Palo Alto, Santa Clara County, California, 94305-6015, United States
STANFORD, CA 943052200
Phone: (650) 723-4000
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 73 Open Payments records for all available years, with a total value of $83,293.
Total Amount is formed as General ($76,796) + Research ($6,497) + Ownership ($0) = $83,293.
Last reported payment date: 2024-12-31 • Largest payer in this snapshot: F. Hoffmann-La Roche AG ($23,590).
Total Amount
$83,293
General + Research + Ownership
Payments
73
Total payment records
General Amount
$76,796
General payments
Research Amount
$6,497
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-31
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| F. Hoffmann-La Roche AG | $23,590 |
| Novartis Gene Therapies, Inc. (fka AveXis, Inc.) | $20,695 |
| Sarepta Therapeutics, Inc. | $15,942 |
| Insmed, Inc. | $6,327 |
| Vertex Pharmaceuticals Incorporated | $4,275 |
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2011-10-24
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20111024000295 | I | Neurology | CA | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99215 | Established patient office or other outpatient visit, 40-54 minutes | 28 | 26 | $0 |
| G2212 | Prolonged office or other outpatient evaluation and management service(s) beyond the maximum required time of the primary procedure which has been selected using total time on the date of the primary service; each additional 15 minutes by the physician or | 20 | 16 | $0 |
Insurance plans in this area (ZIP 94304)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| O B S T E T R I C S/ G Y N E C O L O G Y | TX | |
| - | CA | |
| - | CA | |
| - | CA | |
| O B S T E T R I C S/ G Y N E C O L O G Y | CA | |
| Hematology, Medical Oncology | NY | |
| Certified Registered Nurse Anesthetist (Crna) | TX | |
| Nurse Practitioner | CA | |
| Nurse Practitioner | CA | |
| Neuropsychiatry, Neurology | CA |
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