Helen Man-Son-Hing, MD
Internal Medicine Physician · Novato, CA
Helen Man-Son-Hing, MD is an internal medicine physician with a practice address in Novato, California, and NPI 1033293022, issued on Oct 25, 2006. Check the license (California A63821, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Helen Man-Son-Hing
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A63821 CA
Self-reported in NPPES; status is on the state search - Practice location
- 97 San Marin Dr, Novato, CA 94945
- Phone
- (415) 899-7400
- Enumerated
- Oct 25, 2006
- Record last updated
- Dec 13, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicaid ID
- 00A638210 CA
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 97 San Marin Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Helen Man-Son-Hing in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A63821Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
52% more Medicare Part D claims than the average internal medicine physician in 2024
4,817 Medicare Part D claims for 884 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 84 claims were for opioids.
Most prescribed
- Atorvastatin Calcium442 claims
- Levothyroxine Sodium338 claims
- Amlodipine Besylate327 claims
- Losartan Potassium243 claims
- Lisinopril215 claims
- Hydrochlorothiazide170 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.
Helen Man-Son-Hing among 17,696 internal medicine physician records in California
Helen Man-Son-Hing, MD is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2021 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
27 internal medicine physician records list a practice address in Novato
They are 27 of the 934 NPPES records with a practice address in Novato, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Novato → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- David Conant, MDNovato, CA 949451568546539
- Shawn Donald, MDNovato, CA 949451801970876
- William Elliott, MDNovato, CA 949451144304122
- Amy Ewing, MDNovato, CA 949451861576860
- Barbara Finzen, M.D.Novato, CA 949451134225352
- Ranjit Hundal, M.D.Novato, CA 949451023107976
- Michael Kwok, M.D.Novato, CA 949451124119235
- Robert Lavaysse, MDNovato, CA 949451093899072
Common questions
What is Helen Man-Son-Hing, MD's NPI number?
Helen Man-Son-Hing, MD's National Provider Identifier (NPI) is 1033293022, issued on Oct 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Helen Man-Son-Hing, MD located?
The NPPES record lists a practice address at 97 San Marin Dr, Novato, CA, 94945. Phone: (415) 899-7400. Providers update this record themselves, so call before visiting.
How can I verify Helen Man-Son-Hing, MD's license?
NPPES lists California license number A63821, 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 Helen Man-Son-Hing, MD prescribe under Medicare Part D?
In 2024, Helen Man-Son-Hing, MD had 4,817 Medicare Part D claims for 884 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.