NPPES file of Aug 9, 2026

Ga Yi Lee, M.D.

Obstetrics & Gynecology Physician · Simi Valley, CA

Ga Yi Lee, M.D. is an obstetrics & gynecology physician with a practice address in Simi Valley, California, and NPI 1497918254, issued on Jul 2, 2008. Check the license (California A155495, 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
1497918254
Name
Ga Yi Lee
Credential
M.D.
Primary taxonomy
Obstetrics & Gynecology Physician 207V00000X
License number
A155495 CA
Self-reported in NPPES; status is on the state search
Practice location
1147 Red Tail Way, Simi Valley, CA 93065
Phone
(805) 527-8055
Enumerated
Jul 2, 2008
Record last updated
Jun 29, 2012 (not updated in 14 years: call before relying on the address or phone)
Fax
(805) 520-8849
Medicare enrollment
Enrolled (PECOS I20150128000699); accepts Medicare assignment
Medical or professional school
Albany Medical College Of Union University, 2007
Telehealth
Offers telehealth (CMS)
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 obstetrics & gynecology physician records → All 5,088 in California → Look up another NPI →

Also registered at 1147 Red Tail Way

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

  1. Brittney Ayers, NURSE PRACTITIONERFamily Nurse Practitioner1114454816
  2. Sarah Garcia, D.O.Obstetrics & Gynecology Physician1790088714
  3. Catherine Kim, MDObstetrics & Gynecology Physician1972596120
  4. John Koh, MDObstetrics & Gynecology Physician1841283009
  5. Jennifer Lee, D.O.Obstetrics & Gynecology Physician1033502869
  6. Gerald Murphy, MDObstetrics & Gynecology Physician1023001286

Verify Ga Yi Lee in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A155495    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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5% more Medicare Part D claims than the average obstetrics & gynecology physician in 2024

174 Medicare Part D claims for 53 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 19% of claims.

  1. Ga Lee174
  2. Specialty average165

Most prescribed

  1. Estradiol37 claims
  2. Estradiol (Twice Weekly)36 claims
  3. Progesterone27 claims
  4. Clobetasol Propionate16 claims
  5. Imvexxy11 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: $252.28

10 payments; by number, the most common kind was food and beverage; the largest payer was Exeltis, USA Inc. The 21,429 providers of this specialty with any payment received $1,030.61 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Ga Lee$252.28
  2. Specialty average$1,030.61

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

  1. Obhg California PCThousand Oaks, CA
  2. Simi Obstetrics And Gynecology Medical Group A Medical CorpSimi Valley, CA

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

Ga Yi Lee among 5,088 obstetrics & gynecology physician records in California

Ga Yi Lee, M.D. 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 2008, is newer than 62% of them.

  • NPI issued2008 · 62% of these records are older, 34% newer
  • In a Medicare fileYes · 74% of these records are
  • In the CMS Doctors and Clinicians fileYes · 53% of these records are
  • Graduated2007 · median 2004 among the 2,700 with a school on file
  • Record last updated2012 · 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 Simi Valley → Obstetrics & Gynecology Physician nationwide →

The 8 obstetrics & gynecology physician records with the nearest ZIP codes

  1. Sarah Garcia, D.O.Simi Valley, CA 930651790088714
  2. Catherine Kim, MDSimi Valley, CA 930651972596120
  3. John Koh, MDSimi Valley, CA 930651841283009
  4. Jennifer Lee, D.O.Simi Valley, CA 930651033502869
  5. Gerald Murphy, MDSimi Valley, CA 930651023001286
  6. Abigail NimzSimi Valley, CA 930651750736260
  7. Roopa Rao-Karlamangla, M.D.Simi Valley, CA 930651588650865
  8. Irene Tan, M.D.Simi Valley, CA 930651699942425

Common questions

What is Ga Yi Lee, M.D.'s NPI number?

Ga Yi Lee, M.D.'s National Provider Identifier (NPI) is 1497918254, issued on Jul 2, 2008. An NPI identifies a provider in billing; it is not a license.

Where is Ga Yi Lee, M.D. located?

The NPPES record lists a practice address at 1147 Red Tail Way, Simi Valley, CA, 93065. Phone: (805) 527-8055. Providers update this record themselves, so call before visiting.

How can I verify Ga Yi Lee, M.D.'s license?

NPPES lists California license number A155495, 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 Ga Yi Lee, M.D. prescribe under Medicare Part D?

In 2024, Ga Yi Lee, M.D. had 174 Medicare Part D claims for 53 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.

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.