Doctor profile · Federal record
Dr. Karen Sonnenthal, N.P.
Nurse Practitioner · Walnut Creek, CA
- NPI 1942229463
- Accepts Medicare
- 29 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
1450 Treat Blvd, Suite 120B
Walnut Creek, CA 945972168
(925) 296-9720
fax (925) 296-9034 - Mailing address
-
Dept 34929, P.O. Box 39000
San Francisco, CA 941390001
Credentials & registration
- NPI registered
- July 2006 — 20 yrs on file
- Profile last updated
- April 2, 2014
- Year of graduation
- 1997 — 29 yrs since
- Specialty taxonomy
- 363L00000X — NUCC code
- State license (1)
- California #NP9432
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1942229463. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
948
Distinct HCPCS
10
Medicare allowed
$69,441
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 349 | 205 | $77 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 151 | 112 | $97 | |
G0439 |
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 124 | 124 | $36 | |
99212 |
Established patient office or other outpatient visit, 10-19 minutes | 98 | 88 | $65 | |
81002 |
Urinalysis, manual test | 38 | 36 | $3 | |
90677 |
Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular use | 36 | 36 | $282 | |
G0009 |
Administration of pneumococcal vaccine | 36 | 36 | $31 | |
93000 |
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | 34 | 32 | $15 | |
G0008 |
Administration of influenza virus vaccine | 21 | 21 | $31 | |
90694 |
Influenza vaccine, quadrivalent inactivated, 0.5 ml dosage | 19 | 19 | $75 |
In context: peer comparison
Among 8 peers in Walnut Creek Nurse Practitioner, average services per provider: 72. This provider delivers 13× the peer median.Open Payments
Industry payments received
All-time total
$106
Transactions
5
Manufacturers
4
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Lilly USA, LLC | 2 | $34.45 | |
| Astellas Pharma US INC | 1 | $30.68 | |
| Novartis Pharmaceuticals Corporation | 1 | $22.88 | |
| Pfizer INC. | 1 | $18.27 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
1,540
Patients
457
Total drug cost
$23,026
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Atorvastatin Calcium | Generic | 204 | 63 | $2,957 |
| Rosuvastatin Calcium | Generic | 193 | 56 | $4,507 |
| Levothyroxine Sodium | Generic | 183 | 55 | $2,833 |
| Amlodipine Besylate | Generic | 152 | 51 | $1,405 |
| Lisinopril | Generic | 120 | 38 | $1,014 |
| Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) | Brand | 99 | 21 | $1,591 |
| Gabapentin | Generic | 77 | 18 | $1,222 |
| Losartan Potassium | Generic | 74 | 34 | $1,365 |
| Metoprolol Succinate | Generic | 74 | 21 | $1,546 |
| Hydrochlorothiazide | Generic | 68 | 19 | $235 |
Hospital affiliations
Frequently asked questions
What is Dr. Karen Sonnenthal's medical specialty?
Dr. Karen Sonnenthal practices Nurse Practitioner in Walnut Creek, CA.
Where does Dr. Karen Sonnenthal practice?
Dr. Karen Sonnenthal practices at 1450 Treat Blvd, Walnut Creek, CA 945972168. Office phone: 9252969720.
What is Dr. Karen Sonnenthal's NPI?
Dr. Karen Sonnenthal's National Provider Identifier (NPI) is 1942229463, issued by NPPES.
Does Dr. Karen Sonnenthal accept Medicare assignment?
Yes. Dr. Karen Sonnenthal accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Karen Sonnenthal commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99213); Established patient office or other outpatient visit (HCPCS 99214); Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (HCPCS G0439). Source: CMS Medicare Physician & Other Practitioners file.