Are you Mallory L. Sievers, PA-C? This profile is yours to edit: update your address, phone, photo and services.
Edit this profileAt a glance
- 28253 Branch Rd, Castaic, CA 91384
About Mallory Sievers
Listed in the NPI registry as a physician assistant, Mallory L. Sievers, PA-C practices in Castaic, CA. According to Medicare claims data, Mallory cared for 58 Medicare patients across 58 services. The services billed most often include established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more and established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more. NPI 1902379548 identifies this record in the national registry.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
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
- (661) 803-3654
- Email not available
Practice Locations
28253 BRANCH RD
Castaic, CA 91384
Procedures Most Often Billed to Medicare
58 services · 58 patients · 2 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
33 | Less often than most peers in Physician Assistant |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
25 | Less often than most peers in Physician Assistant |
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.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2018 at Other 8
Providers who graduated from the same medical school in the same year.
Common questions
What is Mallory L. Sievers's specialty?
Mallory L. Sievers is a physician assistant in Castaic, CA. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where can I find Mallory L. Sievers?
Mallory L. Sievers is listed at 28253 Branch Rd, Castaic, CA 91384. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Mallory L. Sievers?
The number on file is (661) 803-3654. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Mallory L. Sievers's NPI number?
Mallory L. Sievers's National Provider Identifier is 1902379548. 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 Mallory L. Sievers's education?
Mallory L. Sievers attended Other, graduating in 2018. This comes from the CMS National Downloadable File.
CMS public data
How long has Mallory L. Sievers been practicing?
Mallory L. Sievers has 8 years experience. Calculated from a graduation year of 2018, reported in the CMS National Downloadable File.
CMS public data
What is Mallory L. Sievers known for?
According to Medicare billing data, Mallory L. Sievers the Medicare record under this individual NPI shows mainly office visits and diagnostic testing. Hospital-based physicians usually have their procedural work billed by the facility rather than under their own number, so this is a floor on their practice, not a description of it. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Mallory L. Sievers confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Mallory L. Sievers. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.