Gretl Chi-Wing Lam, M.D.
Hospice and Palliative Medicine (Internal Medicine) Physician · Sunnyvale, CA
Gretl Chi-Wing Lam, M.D. is a hospice and palliative medicine (internal medicine) physician with a practice address in Sunnyvale, California, and NPI 1184159253, issued on Apr 26, 2017. Check the license (California A203145, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Gretl Chi-Wing Lam
- Credential
- M.D.
- Primary taxonomy
- Hospice and Palliative Medicine (Internal Medicine) Physician 207RH0002X
- License number
- A203145 CA
Self-reported in NPPES; status is on the state search - Practice location
- 301 Old San Francisco RD, Sunnyvale, CA 94086
- Phone
- (408) 730-2860
- Enumerated
- Apr 26, 2017
- Record last updated
- Sep 22, 2025
- Medicare enrollment
- Enrolled (PECOS I20250919004092); accepts Medicare assignment
- Medical or professional school
- New York University School Of Medicine, 2017
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest hospice and palliative medicine (internal medicine) physician records → All 260 in California → Look up another NPI →
Also registered at 301 Old San Francisco RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Wafa Aljuneidi, MSN, APRN-NP, FNP-CNurse Practitioner1083583991
- Aisha AminInternal Medicine Physician1013440981
- Joyce Ang, MDPediatrics Physician1346634698
- Lulua Bahrainwala, MD, MSFamily Medicine Physician1568949709
Verify Gretl Chi-Wing Lam in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A203145Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Sutter Bay Medical FoundationSunnyvale, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gretl Chi-Wing Lam among 260 hospice and palliative medicine (internal medicine) physician records in California
Gretl Chi-Wing Lam, M.D. is one of 260 hospice and palliative medicine (internal medicine) physician records with a practice address in California. 87% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2017, is newer than 77% of them.
- NPI issued2017 · 77% of these records are older, 19% newer
- In a Medicare fileYes · 87% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated2017 · median 2010 among the 193 with a school on file
- Record last updated2025 · 38% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0002X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hospice and Palliative Medicine (Internal Medicine) Physician providers in California
There are 260 hospice and palliative medicine (internal medicine) physician records in California.
All 260 in California → Every provider in Sunnyvale → Hospice and Palliative Medicine (Internal Medicine) Physician nationwide →
The 8 hospice and palliative medicine (internal medicine) physician records with the nearest ZIP codes
- Angela Wong, MDSunnyvale, CA 940861851785703
- Ellen Brown, M.D.Sunnyvale, CA 940851710109699
- Anita Gandhy, MDSan Francisco, CA 941091962516898
- Melissa Goebel, M.D.San Francisco, CA 941091477630762
- Shoshana Helman, MDRedwood City, CA 940631750345633
- Catherine Seeley, M.D.San Francisco, CA 941091629277561
- Todd Barrett, M.D.San Francisco, CA 941101184888760
- Dawn Gross, M.D., PH.D.San Francisco, CA 941101053434985
Common questions
What is Gretl Chi-Wing Lam, M.D.'s NPI number?
Gretl Chi-Wing Lam, M.D.'s National Provider Identifier (NPI) is 1184159253, issued on Apr 26, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Gretl Chi-Wing Lam, M.D. located?
The NPPES record lists a practice address at 301 Old San Francisco RD, Sunnyvale, CA, 94086. Phone: (408) 730-2860. Providers update this record themselves, so call before visiting.
How can I verify Gretl Chi-Wing Lam, M.D.'s license?
NPPES lists California license number A203145, 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.
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.