Provider Profile
Karen L. Sonnenthal, N.P.
Unclaimed ProfileAbout Karen Sonnenthal
Karen L. Sonnenthal, N.P. is a nurse practitioner based in Walnut Creek, CA. Medicare claims data shows Karen provided 953 services to 767 patients. The services billed most often include established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more, established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more, and annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it — free, and no identity document with a practice or institutional email.
Education & Training
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (925) 296-9720
- Email not available
Practice Locations
1450 TREAT BLVD SUITE 120B
Walnut Creek, CA 94597
Procedures Most Often Billed to Medicare
953 services · 767 patients · 15 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | Treatment | 93000 |
37 | As often as other peers in Nurse Practitioner |
| Influenza vaccine split virus, preservative free | Treatment | 90662 |
23 | As often as other peers in Nurse Practitioner |
| Admn sarscov2 vacc 1 dose | Treatment | 90480 |
19 | As often as other peers in Nurse Practitioner |
| Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular use | Treatment | 90677 |
14 | As often as other peers in Nurse Practitioner |
| Sarscov2 vac 50 mcg/0.5ml im | Treatment | 91322 |
13 | Less often than most peers in Nurse Practitioner |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
299 | More than most peers in Nurse Practitioner |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
213 | More often than most peers in Nurse Practitioner |
| Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | Billing code | G0439 |
104 | More often than most peers in Nurse Practitioner |
| Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient' | Billing code | G2211 |
91 | As often as other peers in Nurse Practitioner |
| Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more | Office visit | 99212 |
54 | More often than most peers in Nurse Practitioner |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Related specialists at this location 8
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other nurse practitioners in Walnut Creek 8
Same specialty, same city.
More connections — 24 related providers in 3 groups
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 1997 at Other 8
Providers who graduated from the same medical school in the same year.
Also performs Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report 8
Providers in CA who bill this service to Medicare most often.
Common questions
What is Karen L. Sonnenthal's specialty?
Karen L. Sonnenthal is a nurse practitioner in Walnut Creek, CA. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where can I find Karen L. Sonnenthal?
Karen L. Sonnenthal is listed at 1450 Treat Blvd Suite 120B, Walnut Creek, CA 94597. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Karen L. Sonnenthal?
The number on file is (925) 296-9720. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Karen L. Sonnenthal?
Karen L. Sonnenthal's National Provider Identifier is 1942229463. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
What is Karen L. Sonnenthal's education?
Karen L. Sonnenthal attended Other, graduating in 1997. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Karen L. Sonnenthal have?
Karen L. Sonnenthal has 29 years experience. Calculated from a graduation year of 1997, reported in the CMS National Downloadable File.
CMS public data
What is Karen L. Sonnenthal known for?
According to Medicare billing data, Karen L. Sonnenthal provides treatments such as routine electrocardiogram using at least 12 leads with interpretation and report and influenza vaccine split virus, preservative free, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Karen L. Sonnenthal's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Karen L. Sonnenthal. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.