Alyssa Lo, MD
Obstetrics & Gynecology Physician · Greenbrae, CA
Alyssa Lo, MD is an obstetrics & gynecology physician with a practice address in Greenbrae, California, and NPI 1952964835, issued on Apr 17, 2019. Check the license (California A179639, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Alyssa Lo
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- A179639 CA
Self-reported in NPPES; status is on the state search - Practice location
- 100A Drakes Landing RD Ste 225, Greenbrae, CA 94904
- Phone
- (415) 461-7800
- Enumerated
- Apr 17, 2019
- Record last updated
- Nov 18, 2025
- Fax
- (415) 461-8619
- Medicare enrollment
- Enrolled (PECOS I20230720000455); may accept Medicare assignment
- Medical or professional school
- University Of California, Irvine, California College Of Medicine, 2019
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 5,088 in California → Look up another NPI →
Also registered at 100A Drakes Landing RD Ste 225
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Alexis Cardellini, M.D.Obstetrics & Gynecology Physician1922242858
- Courtney Cines, PA-CPhysician Assistant1447758404
- Amanda Deson, D.O.Obstetrics & Gynecology Physician1407203599
- Kate Frometa Song, CNMMidwife1497709844
- Sujatha Pathi, M.D.Urogynecology and Reconstructive Pelvic Surgery (Obstetrics & Gynecology) Physician1639353279
- Katherine Reim, MDObstetrics & Gynecology Physician1417451758
Verify Alyssa Lo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A179639Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
73% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
44 Medicare Part D claims for 21 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D.
Most prescribed
- Progesterone12 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: $160.14
14 payments; by number, the most common kind was food and beverage; the largest payer was Mayne Pharma Commercial LLC. 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.
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
- Lizellen LA Follette MD IncGreenbrae, CA
- Regents Univ OF California UcsfSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Alyssa Lo among 5,088 obstetrics & gynecology physician records in California
Alyssa Lo, 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 2019, is newer than 92% of them.
- NPI issued2019 · 92% of these records are older, 6% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated2019 · 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).
26 obstetrics & gynecology physician records list a practice address in Greenbrae
They are 26 of the 727 NPPES records with a practice address in Greenbrae, and 5,088 obstetrics & gynecology physician records in California.
All 5,088 in California → Every provider in Greenbrae → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Stephen Bearg, M.D.10161945Greenbrae, CA 949041194702431
- Nona Cunningham, M.D.Greenbrae, CA 949041770560997
- Brian Demuth, MDGreenbrae, CA 949041770553950
- Sylvia Flores, M.D.Greenbrae, CA 949041114904307
- Lucia Franca, M.D.Greenbrae, CA 949041558522722
- David Galland, M.D.Greenbrae, CA 949041154392637
- Cortney Harper, M.D.Greenbrae, CA 949041053587667
- Richard Hunter, MDGrennbrae, CA 949041235299272
Common questions
What is Alyssa Lo, MD's NPI number?
Alyssa Lo, MD's National Provider Identifier (NPI) is 1952964835, issued on Apr 17, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Alyssa Lo, MD located?
The NPPES record lists a practice address at 100A Drakes Landing RD Ste 225, Greenbrae, CA, 94904. Phone: (415) 461-7800. Providers update this record themselves, so call before visiting.
How can I verify Alyssa Lo, MD's license?
NPPES lists California license number A179639, 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 Alyssa Lo, MD prescribe under Medicare Part D?
In 2024, Alyssa Lo, MD had 44 Medicare Part D claims for 21 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.