Alison Lyn Deforest Sjahrial, MD
Obstetrics & Gynecology Physician · San Diego, CA
Alison Lyn Deforest Sjahrial, MD is an obstetrics & gynecology physician with a practice address in San Diego, California, and NPI 1154900843, issued on Apr 7, 2021. Check the license (California A188120, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Alison Lyn Deforest Sjahrial
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- A188120 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1809 National Ave, San Diego, CA 92113
- Phone
- (619) 515-2300
- Enumerated
- Apr 7, 2021
- Record last updated
- Sep 29, 2025
- Medicare enrollment
- Enrolled (PECOS I20250630001225); accepts Medicare assignment
- Medical or professional school
- Loyola University Of Chicago, Stritch School Of Medicine, 2021
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 5,088 in California → Look up another NPI →
Also registered at 1809 National Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jacqueline Acosta, RDNRegistered Dietitian1659135879
- Janice Acosta-Mariscal, OTR/LOccupational Therapist1194571984
- Hammad Afif, DDSDentist1932845385
- Marco Alegria, DDSDentist1437224466
- Carlos Alessandrini, NUTRITIONISTNutritionist1093268021
- Lysistrati Alimonos, D.O.Obstetrics & Gynecology Physician1619397031
Verify Alison Lyn Deforest Sjahrial in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A188120Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
82% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
29 Medicare Part D claims for 15 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D.
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.
Bills Medicare through one group practice
- Family Health Centers OF San Diego IncSan Diego, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Alison Lyn Deforest Sjahrial among 5,088 obstetrics & gynecology physician records in California
Alison Lyn Deforest Sjahrial, MD is one of 5,088 obstetrics & gynecology physician records with a practice address in California. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 96% of them.
- NPI issued2021 · 96% of these records are older, 2% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated2021 · median 2004 among the 2,700 with a school on file
- Record last updated2025 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Obstetrics & Gynecology Physician providers in California
There are 5,088 obstetrics & gynecology physician records in California.
All 5,088 in California → Every provider in San Diego → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Lysistrati Alimonos, D.O.San Diego, CA 921131619397031
- Charlene Buechner, M.D.San Diego, CA 921131376663831
- Laura Ceballos, M.D.San Diego, CA 921131275724841
- Marisa Gonzalez, M.D.San Diego, CA 921131083870463
- Rebekah Grant, M.D.San Diego, CA 921131326243833
- Lauren Hanley, MDSan Diego, CA 921131053392035
- Cindy Jaime, MDSan Diego, CA 921131568655785
- Lisa Lipschitz, MDSan Diego, CA 921131649208711
Common questions
What is Alison Lyn Deforest Sjahrial, MD's NPI number?
Alison Lyn Deforest Sjahrial, MD's National Provider Identifier (NPI) is 1154900843, issued on Apr 7, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Alison Lyn Deforest Sjahrial, MD located?
The NPPES record lists a practice address at 1809 National Ave, San Diego, CA, 92113. Phone: (619) 515-2300. Providers update this record themselves, so call before visiting.
How can I verify Alison Lyn Deforest Sjahrial, MD's license?
NPPES lists California license number A188120, 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 Alison Lyn Deforest Sjahrial, MD prescribe under Medicare Part D?
In 2024, Alison Lyn Deforest Sjahrial, MD had 29 Medicare Part D claims for 15 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. 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.