Doctor profile · Federal record
Dr. John Day, MD
Neuromuscular Medicine (Psychiatry & Neurology) Physician (CMS: Neurology) · Neurology Physician · Stanford, CA
- NPI 1447291992
- Accepts Medicare
- MIPS 75.5 / 100 · 2023
- 49 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
300 Pasteur Dr
Stanford, CA 943052200
(650) 723-4000 - Additional location
-
725 Welch RD
Palo Alto, CA 943041601
(650) 497-8000
Credentials & registration
- NPI registered
- June 2006 — 20 yrs on file
- Profile last updated
- November 9, 2023
- Year of graduation
- 1977 — 49 yrs since
- Specialty taxonomy
- 2084N0008X — NUCC code
- State license (1)
- California #G52734
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1447291992. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
48
Distinct HCPCS
2
Medicare allowed
$5,375
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 28 | 26 | $166 | |
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 | $36 |
In context: peer comparison
Among 5 peers in this city , average services per provider: 44. This provider delivers 1.1× the peer median.Open Payments
Industry payments received
All-time total
$14,012
Transactions
6
Manufacturers
6
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Sarepta Therapeutics, Inc. | 1 | $5,320.00 | |
| Genentech USA, Inc. | 1 | $3,450.00 | |
| Merck Sharp & Dohme LLC | 1 | $2,640.00 | |
| F. Hoffmann-La Roche AG | 1 | $1,680.00 | |
| Roche Products Limited | 1 | $830.00 | |
| Novartis Pharmaceuticals Corporation | 1 | $91.60 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
36
Patients
0
Total drug cost
$609,037
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Evrysdi (Risdiplam) | Brand | 24 | 0 | $608,678 |
| Tizanidine Hcl | Generic | 12 | 0 | $359 |
Hospital affiliations
Frequently asked questions
What is Dr. John Day's medical specialty?
Dr. John Day practices Neuromuscular Medicine (Psychiatry & Neurology) Physician in Stanford, CA.
Where does Dr. John Day practice?
Dr. John Day practices at 300 Pasteur Dr, Stanford, CA 943052200. Office phone: 6507234000.
What is Dr. John Day's NPI?
Dr. John Day's National Provider Identifier (NPI) is 1447291992, issued by NPPES.
Does Dr. John Day accept Medicare assignment?
Yes. Dr. John Day accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. John Day commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99215); 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 (HCPCS G2212). Source: CMS Medicare Physician & Other Practitioners file.