NPPES file of Aug 9, 2026

Lauren Sue-Jung Choi, M.D.

Internal Medicine Physician · Martinez, CA

Lauren Sue-Jung Choi, M.D. is an internal medicine physician with a practice address in Martinez, California, and NPI 1700271210, issued on Apr 1, 2015. Check the license (California A173632, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1700271210
Name
Lauren Sue-Jung Choi
Credential
M.D.
Primary taxonomy
Internal Medicine Physician 207R00000X
License numbers
A173632 CA
18085 NV
Self-reported in NPPES; status is on the state search
Practice location
200 Muir RD, Martinez, CA 94553
Phone
(925) 229-7756
Enumerated
Apr 1, 2015
Record last updated
Aug 9, 2024
Fax
(925) 229-7757
Medicare enrollment
Enrolled (PECOS I20231025002615); accepts Medicare assignment
Medical or professional school
Drexel University College Of Medicine, 2015
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →

Also registered at 200 Muir RD

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Sharon Abrams, MDDiagnostic Radiology Physician1780762856
  2. Elizabeth Aguirre, PHARM.D.Pharmacist1518119833
  3. Mona Ahmad, M.D.Physical Medicine & Rehabilitation Physician1881128510
  4. Eric Alexander, MDNeuromuscular Medicine (Physical Medicine & Rehabilitation) Physician1922180157
  5. Robert Anderson, MDInternal Medicine Physician1447338538
  6. May Antonio, PTPhysical Therapist1245553668

Verify Lauren Sue-Jung Choi in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A173632    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

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15% fewer Medicare Part D claims than the average internal medicine physician in 2024

2,703 Medicare Part D claims for 311 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 63 claims were for opioids.

  1. Lauren Choi2,703
  2. Specialty average3,176

Most prescribed

  1. Atorvastatin Calcium223 claims
  2. Levothyroxine Sodium104 claims
  3. Gabapentin84 claims
  4. Furosemide83 claims
  5. Amlodipine Besylate76 claims
  6. Sertraline Hcl71 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.

Bills Medicare through one group practice

  1. Permanente Medical Group IncWalnut Creek, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Lauren Sue-Jung Choi among 17,696 internal medicine physician records in California

Lauren Sue-Jung Choi, M.D. is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 76% of them.

  • NPI issued2015 · 76% of these records are older, 21% newer
  • In a Medicare fileYes · 79% of these records are
  • In the CMS Doctors and Clinicians fileYes · 63% of these records are
  • Graduated2015 · median 2004 among the 11,065 with a school on file
  • Record last updated2024 · 61% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

48 internal medicine physician records list a practice address in Martinez

They are 48 of the 1,816 NPPES records with a practice address in Martinez, and 17,696 internal medicine physician records in California.

All 17,696 in California → Every provider in Martinez → Internal Medicine Physician nationwide →

The 8 internal medicine physician records with the nearest ZIP codes

  1. David Chapman, MDMartinez, CA 945531578548129
  2. George Chuang, DOMartinez, CA 945531235217324
  3. Jeremy Fish, MDMartinez, CA 945531952497943
  4. Thomas Gamsky, MDMartinez, CA 945531043296247
  5. Gerhard Heinrich, M.D.Martinez, CA 945531306828728
  6. Nancy Lazarus, M.D.Martinez, CA 945531073598223
  7. Sara Levin, MDMartinez, CA 945531184707853
  8. Brian O'Neill, M.D.Martinez, CA 945531366425985

Common questions

What is Lauren Sue-Jung Choi, M.D.'s NPI number?

Lauren Sue-Jung Choi, M.D.'s National Provider Identifier (NPI) is 1700271210, issued on Apr 1, 2015. An NPI identifies a provider in billing; it is not a license.

Where is Lauren Sue-Jung Choi, M.D. located?

The NPPES record lists a practice address at 200 Muir RD, Martinez, CA, 94553. Phone: (925) 229-7756. Providers update this record themselves, so call before visiting.

How can I verify Lauren Sue-Jung Choi, M.D.'s license?

NPPES lists California license number A173632, 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 Lauren Sue-Jung Choi, M.D. prescribe under Medicare Part D?

In 2024, Lauren Sue-Jung Choi, M.D. had 2,703 Medicare Part D claims for 311 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.