Jessica Siak, M.D.
Hospitalist Physician · West Hollywood, CA
Jessica Siak, M.D. is a hospitalist physician with a practice address in West Hollywood, California, and NPI 1174059570, issued on May 4, 2017. Check the license (California A161511, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Jessica Siak
- Credential
- M.D.
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License number
- A161511 CA
Self-reported in NPPES; status is on the state search - Practice location
- 8700 Beverly Blvd # B220, West Hollywood, CA 90048
- Phone
- (310) 423-5252
- Enumerated
- May 4, 2017
- Record last updated
- Jun 16, 2022
- Fax
- (310) 423-8441
- Medicare enrollment
- Enrolled (PECOS I20200902002556); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 3,099 in California → Look up another NPI →
Also registered at 8700 Beverly Blvd # B220
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Jessica Siak in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A161511Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
28% fewer Medicare Part D claims than the average hospitalist physician in 2024
377 Medicare Part D claims for 182 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D. 22 claims were for opioids.
Most prescribed
- Cefdinir27 claims
- Atorvastatin Calcium21 claims
- Prednisone21 claims
- Amoxicillin-Clavulanate Potass15 claims
- Furosemide15 claims
- Eliquis13 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $612.38
30 payments; by number, the most common kind was food and beverage; the largest payer was Janssen Pharmaceuticals, Inc. The 7,324 providers of this specialty with any payment received $494.84 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Cedars-Sinai Medical Care FoundationWest Hollywood, CA
- Torrance Health Association IncRedondo Beach, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jessica Siak among 3,099 hospitalist physician records in California
Jessica Siak, M.D. is one of 3,099 hospitalist physician records with a practice address in California. 90% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2017, is newer than 74% of them.
- NPI issued2017 · 74% of these records are older, 23% newer
- In a Medicare fileYes · 90% of these records are
- In the CMS Doctors and Clinicians fileYes · 81% of these records are
- Graduated2017 · median 2010 among the 2,505 with a school on file
- Record last updated2022 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
99 hospitalist physician records list a practice address in West Hollywood
They are 99 of the 2,619 NPPES records with a practice address in West Hollywood, and 3,099 hospitalist physician records in California.
All 3,099 in California → Every provider in West Hollywood → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Afshin Afrashteh, MDLos Angeles, CA 900481346402989
- Mark Choi, M.D.Los Angeles, CA 900481124287354
- Shahida Farooqi, M.D.West Hollywood, CA 900481568622520
- Prabhu Gounder, M.D.West Hollywood, CA 900481508963893
- Gary Gutkin, M.D.West Hollywood, CA 900481366636573
- Denise JungWest Hollywood, CA 900481013179399
- Lowell Korman, M.D.West Hollywood, CA 900481912113309
- Jae Lee, M.D.Los Angeles, CA 900481073614079
Common questions
What is Jessica Siak, M.D.'s NPI number?
Jessica Siak, M.D.'s National Provider Identifier (NPI) is 1174059570, issued on May 4, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Jessica Siak, M.D. located?
The NPPES record lists a practice address at 8700 Beverly Blvd # B220, West Hollywood, CA, 90048. Phone: (310) 423-5252. Providers update this record themselves, so call before visiting.
How can I verify Jessica Siak, M.D.'s license?
NPPES lists California license number A161511, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Jessica Siak, M.D. prescribe under Medicare Part D?
In 2024, Jessica Siak, M.D. had 377 Medicare Part D claims for 182 beneficiaries; the average among hospitalist physician prescribers was 521. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.