Doctor profile · Federal record
Dr. Karen Butterfield, M.D.
Internal Medicine Physician · Palo Alto, CA
- NPI 1619083144
- 20 yrs on file
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
795 El Camino Real
Palo Alto, CA 943012302
(650) 321-4121 - Mailing address
-
2350 W. El Camino Real, 2Nd Floor
Mountain View, CA 940406203
Credentials & registration
- NPI registered
- August 2006 — 20 yrs on file
- Profile last updated
- January 6, 2012
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- California #G69715
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1619083144. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
85
Distinct HCPCS
3
Medicare allowed
$14,729
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 39 | 37 | $156 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 33 | 33 | $218 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 13 | 13 | $111 |
In context: peer comparison
Among 30 peers in this city , average services per provider: 82. This provider delivers 1.0× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
30
Patients
0
Total drug cost
$389
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Losartan Potassium | Generic | 18 | 0 | $205 |
| Atorvastatin Calcium | Generic | 12 | 0 | $184 |
Frequently asked questions
What is Dr. Karen Butterfield's medical specialty?
Dr. Karen Butterfield practices Internal Medicine Physician in Palo Alto, CA.
Where does Dr. Karen Butterfield practice?
Dr. Karen Butterfield practices at 795 El Camino Real, Palo Alto, CA 943012302. Office phone: 6503214121.
What is Dr. Karen Butterfield's NPI?
Dr. Karen Butterfield's National Provider Identifier (NPI) is 1619083144, issued by NPPES.
What procedures does Dr. Karen Butterfield commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Established patient office or other outpatient visit (HCPCS 99215); Established patient office or other outpatient visit (HCPCS 99213). Source: CMS Medicare Physician & Other Practitioners file.