Doctor profile · Federal record
Dr. Grace Guo, MD
Internal Medicine Physician (CMS: Internal Medicine) · Sunnyvale, CA
- NPI 1902811375
- Accepts Medicare
- 30 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
401 Old San Francisco RD
Sunnyvale, CA 940866387
(408) 730-4360 - Mailing address
-
2350 W El Camino Real, 2Nd Floor
Mountain View, CA 940406201
Credentials & registration
- NPI registered
- July 2006 — 20 yrs on file
- Profile last updated
- December 1, 2011
- Year of graduation
- 1996 — 30 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- California #A64096
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1902811375. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
317
Distinct HCPCS
4
Medicare allowed
$49,355
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 205 | 134 | $155 | |
G0439 |
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 43 | 43 | $160 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 37 | 34 | $110 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 32 | 27 | $205 |
In context: peer comparison
Among 14 peers in Sunnyvale Internal Medicine Physician, average services per provider: 58. This provider delivers 5.5× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
892
Patients
229
Total drug cost
$14,277
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Atorvastatin Calcium | Generic | 193 | 60 | $3,223 |
| Amlodipine Besylate | Generic | 151 | 41 | $1,623 |
| Losartan Potassium | Generic | 74 | 22 | $1,271 |
| Alendronate Sodium | Generic | 67 | 19 | $1,512 |
| Levothyroxine Sodium | Generic | 67 | 17 | $1,156 |
| Lisinopril | Generic | 62 | 18 | $929 |
| Metformin Hcl | Generic | 40 | 13 | $784 |
| Omeprazole | Generic | 40 | 15 | $651 |
| Hydrochlorothiazide | Generic | 37 | 12 | $262 |
| Lovastatin | Generic | 36 | 0 | $657 |
Frequently asked questions
What is Dr. Grace Guo's medical specialty?
Dr. Grace Guo practices Internal Medicine Physician in Sunnyvale, CA.
Where does Dr. Grace Guo practice?
Dr. Grace Guo practices at 401 Old San Francisco RD, Sunnyvale, CA 940866387. Office phone: 4087304360.
What is Dr. Grace Guo's NPI?
Dr. Grace Guo's National Provider Identifier (NPI) is 1902811375, issued by NPPES.
Does Dr. Grace Guo accept Medicare assignment?
Yes. Dr. Grace Guo accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Grace Guo commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (HCPCS G0439); Established patient office or other outpatient visit (HCPCS 99213). Source: CMS Medicare Physician & Other Practitioners file.