NPPES file of Aug 9, 2026

Martha Lee Liao, M.D.

Obstetrics & Gynecology Physician · Pasadena, CA

Martha Lee Liao, M.D. is an obstetrics & gynecology physician with a practice address in Pasadena, California, and NPI 1518161728, issued on Jun 12, 2007. Check the license (California A91141, 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
1518161728
Name
Martha Lee Liao
Credential
M.D.
Primary taxonomy
Obstetrics & Gynecology Physician 207V00000X
License number
A91141 CA
Self-reported in NPPES; status is on the state search
Practice location
242 E Glenarm St Unit 5, Pasadena, CA 91106
Phone
(210) 364-7431
Enumerated
Jun 12, 2007
Record last updated
Mar 7, 2023
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). 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 →

Verify Martha Lee Liao in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A91141    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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12% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024

146 Medicare Part D claims for 45 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 30% of claims.

  1. Martha Liao146
  2. Specialty average165

Most prescribed

  1. Estradiol54 claims
  2. Vandazole15 claims
  3. Progesterone14 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.

Martha Lee Liao among 5,088 obstetrics & gynecology physician records in California

Martha Lee Liao, 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 2007, is newer than 48% of them.

  • NPI issued2007 · 48% of these records are older, 38% newer
  • In a Medicare fileYes · 74% of these records are
  • In the CMS Doctors and Clinicians fileNo · 53% of these records are
  • Record last updated2023 · 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 Pasadena → Obstetrics & Gynecology Physician nationwide →

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

  1. Jonathan Tam, M.D.Pasadena, CA 911061013942952
  2. Kathy Walker, M.D. FACOGPasadena, CA 911061861495483
  3. Alice Yung, MDPasadena, CA 911061851403224
  4. Alya Ahmad, DOPasadena, CA 911051538796669
  5. Amanda Barnes, MD/MPHPasadena, CA 911051518480698
  6. Ashley Benda, D.O.Pasadena, CA 911051295129856
  7. Kim Bui, M.D.Pasadena, CA 911051164871133
  8. Emily Chu, MDPasadena, CA 911051053947978

Common questions

What is Martha Lee Liao, M.D.'s NPI number?

Martha Lee Liao, M.D.'s National Provider Identifier (NPI) is 1518161728, issued on Jun 12, 2007. An NPI identifies a provider in billing; it is not a license.

Where is Martha Lee Liao, M.D. located?

The NPPES record lists a practice address at 242 E Glenarm St Unit 5, Pasadena, CA, 91106. Phone: (210) 364-7431. Providers update this record themselves, so call before visiting.

How can I verify Martha Lee Liao, M.D.'s license?

NPPES lists California license number A91141, 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 Martha Lee Liao, M.D. prescribe under Medicare Part D?

In 2024, Martha Lee Liao, M.D. had 146 Medicare Part D claims for 45 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.