JESSICA SIAK M.D.
NPI 1174059570
Hospitalist in West Hollywood, CA

Q: What is Jessica Siak's NPI number?

The NPI number for Jessica Siak is 1174059570. It was assigned to this individual provider in the NPPES registry on May 4, 2017.

Q: What is Jessica Siak's specialty?

The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.

Q: When was this NPI record last updated?

The NPPES record for Jessica Siak was last updated on June 16, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since May 04, 2017PECOS EnrolledAccepts Medicare Assignment

8700 BEVERLY BLVD # B220, WEST HOLLYWOOD, CA 90048(310) 423-5252(310) 423-8441 Get Directions Write a Review

NPPES record last updated: June 16, 2022. Verified against the NPPES registry weekly; last sync: October 25, 2026.

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About Jessica Siak M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

JESSICA SIAK M.D. (NPI 1174059570) is an individual hospitalist provider in West Hollywood, California, licensed in California (A161511) and active in the NPI registry since May 2017. She is enrolled in Medicare PECOS, maintains a secondary practice location in Marina Del Rey, and is a graduate of Other (2017).

NPPES Registry Identity

NPI1174059570

Entity TypeIndividualFemale

Primary Taxonomy208M00000X

Provider Legal NameJESSICA SIAKCredential: M.D.

Location Address8700 BEVERLY BLVD # B220West Hollywood, CA 90048-1804

Mailing Address4140 W 190th StTorrance, CA 90504-5513

Phone(310) 423-5252

Fax(310) 423-8441

Sole ProprietorNo

Medical School CMSOtherGraduated 2017

Enumeration DateMay 4, 2017

Last NPPES UpdateJune 16, 2022

NPPES CertifiedJune 16, 2022

✔ NPI 1174059570 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyHospitalistAllopathic & Osteopathic Physicians

Taxonomy Code208M00000X

License✔ Licensed in CA · A161511

Definition

Hospitalists are physicians whose primary professional focus is the general medical care of hospitalized patients. Their activities include patient care, teaching, research, and leadership related to Hospital Medicine. The term 'hospitalist' refers to physicians whose practice emphasizes providing care for hospitalized patients.

Also ListedInternal MedicineTaxonomy 207R00000X · License A161511 (CA)

Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X

8700 BEVERLY BLVD # B220, West Hollywood, CA 90048

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Secondary Practice Location 1

Location 14650 Lincoln BlvdMarina Del Rey, CA 90292-6306 · Phone (310) 823-8911

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Jessica Siak M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID2961829163

PECOS Enrollment IDI20200902002556

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show Jessica Siak reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Cedars-Sinai Medical Care Foundation

Same address

Anesthesiology

8700 BEVERLY BLVD STE SB-290
Los Angeles, CA 90048

Reassigned Medicare billing, California enrollment
2,118 clinicians in this Medicare group

NPI 1043826720 (310) 423-1447

Torrance Health Association Inc

18 mi

Family Medicine

3333 SKYPARK DR, SUITE 100
Torrance, CA 90505

Reassigned Medicare billing, California enrollment
388 clinicians in this Medicare group

NPI 1083903124 (310) 784-6300

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 4

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233

Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.

505 services163 patients

Hospital discharge day management, more than 30 minutes 99239

Hospital discharge day management over 30 minutes involves a detailed process to ensure a smooth transition from hospital to home. It includes final examinations, discussion of your hospital stay, post-discharge instructions, and coordinating follow-up care.

192 services183 patients

Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223

Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.

112 services107 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

100 services34 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 90048 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$142.39 typical visit price

range $62.96 – $187.60

Typical copayment $35.59 (range $15.74 – $46.90)

Most-billed visit code 99204

Established Patient

$109.96 typical visit price

range $20.84 – $153.61

Typical copayment $27.49 (range $5.21 – $38.40)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

ARPIT ARORA MD

Physical Medicine & Rehabilitation (Hospice and Palliative Medicine)