Nancy Ngoc Giao Ly, MD, MPH
Occupational Medicine Physician · Walnut Creek, CA
Nancy Ngoc Giao Ly, MD, MPH is an occupational medicine physician with a practice address in Walnut Creek, California, and NPI 1598050205, issued on Jun 10, 2011. Check the license (California A153735, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Nancy Ngoc Giao Ly
- Credential
- MD, MPH
- Primary taxonomy
- Occupational Medicine Physician 2083X0100X
- License number
- A153735 CA
Self-reported in NPPES; status is on the state search - Practice location
- 320 Lennon LN Bldg 3, Walnut Creek, CA 94598
- Phone
- (925) 206-2000
- Enumerated
- Jun 10, 2011
- Record last updated
- Feb 11, 2022
- Medicare enrollment
- Enrolled (PECOS I20180718002219); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest occupational medicine physician records → All 415 in California → Look up another NPI →
Also registered at 320 Lennon LN Bldg 3
A shared address usually means a shared clinic or building; it does not show who employs whom.
- David Fan, MDAllergy & Immunology Physician1619596152
Verify Nancy Ngoc Giao Ly in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A153735Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
69% fewer Medicare Part D claims than the average occupational medicine physician in 2024
244 Medicare Part D claims for 187 beneficiaries, against an average of 794 among the 463 providers of this specialty who prescribed in Part D.
Most prescribed
- Albuterol Sulfate Hfa39 claims
- Paxlovid22 claims
- Azithromycin21 claims
- Nitrofurantoin Mono-Macro20 claims
- Prednisone12 claims
- Ciprofloxacin Hcl11 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
- Permanente Medical Group IncStockton, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nancy Ngoc Giao Ly among 415 occupational medicine physician records in California
Nancy Ngoc Giao Ly, MD, MPH is one of 415 occupational medicine physician records with a practice address in California. 30% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 82% of them.
- NPI issued2011 · 82% of these records are older, 16% newer
- In a Medicare fileYes · 30% of these records are
- In the CMS Doctors and Clinicians fileYes · 12% of these records are
- Graduated2011 · median 1995 among the 51 with a school on file
- Record last updated2022 · 75% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2083X0100X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Occupational Medicine Physician providers in California
There are 415 occupational medicine physician records in California.
All 415 in California → Every provider in Walnut Creek → Occupational Medicine Physician nationwide →
The 8 occupational medicine physician records with the nearest ZIP codes
- June Gonzales, MDWalnut Creek, CA 945981942372784
- Philip Jenkins, MDWalnut Creek, CA 945961467530550
- Hilary Kauffman, MDWalnut Creek, CA 945961124106281
- Jeffrey Gao, MDVallejo, CA 945891710065552
- Dinesh Govindarao, M.D.Oakland, CA 946071932319142
- William Hopper, MDOakland, CA 946071447439765
- David Jourgensen, M.D.Oakland, CA 946071073638243
- Brian Knapp, MDVallejo, CA 945891528146362
Common questions
What is Nancy Ngoc Giao Ly, MD, MPH's NPI number?
Nancy Ngoc Giao Ly, MD, MPH's National Provider Identifier (NPI) is 1598050205, issued on Jun 10, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Nancy Ngoc Giao Ly, MD, MPH located?
The NPPES record lists a practice address at 320 Lennon LN Bldg 3, Walnut Creek, CA, 94598. Phone: (925) 206-2000. Providers update this record themselves, so call before visiting.
How can I verify Nancy Ngoc Giao Ly, MD, MPH's license?
NPPES lists California license number A153735, 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 Nancy Ngoc Giao Ly, MD, MPH prescribe under Medicare Part D?
In 2024, Nancy Ngoc Giao Ly, MD, MPH had 244 Medicare Part D claims for 187 beneficiaries; the average among occupational medicine physician prescribers was 794. 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.