Mark Jordan Sontag, MD
Physical Medicine & Rehabilitation Physician · Redwood City, CA
Mark Jordan Sontag, MD is a physical medicine & rehabilitation physician with a practice address in Redwood City, California, and NPI 1891854568, issued on Dec 8, 2006. Check the license (California G052976, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mark Jordan Sontag
- Credential
- MD
- Primary taxonomy
- Physical Medicine & Rehabilitation Physician 208100000X
- License number
- G052976 CA
Self-reported in NPPES; status is on the state search - Practice location
- 363 Main St, Redwood City, CA 94063
- Phone
- (650) 306-9490
- Enumerated
- Dec 8, 2006
- Record last updated
- May 28, 2009 (not updated in 17 years: call before relying on the address or phone)
- Fax
- (650) 306-0250
- Entity
- Type 1 · individual
8 nearest physical medicine & rehabilitation physician records → All 1,549 in California → Look up another NPI →
Also registered at 363 Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Danielle Bautista, A.N.P.Adult Health Nurse Practitioner1184969651
- Carol Corley, RN NPNurse Practitioner1821324039
- Elaine Date, M.D.Physical Medicine & Rehabilitation Physician1023107364
- David Lague, MPA-CMedical Physician Assistant1295979227
- Celia Marquis, NP AND RNFamily Nurse Practitioner1487954285
- Marina Zyskina, RN,MSN,NPNurse Practitioner1912343328
Verify Mark Jordan Sontag in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G052976Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average physical medicine & rehabilitation physician in 2024
27 Medicare Part D claims, against an average of 727 among the 7,448 providers of this specialty who prescribed in Part D.
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: $113.66
5 payments; by number, the most common kind was food and beverage; the largest payer was Curonix LLC. The 3,895 providers of this specialty with any payment received $1,237.86 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.
Mark Jordan Sontag among 1,549 physical medicine & rehabilitation physician records in California
Mark Jordan Sontag, MD is one of 1,549 physical medicine & rehabilitation physician records with a practice address in California. 59% 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 3% of them.
- NPI issued2006 · 3% of these records are older, 70% newer
- In a Medicare fileYes · 59% of these records are
- In the CMS Doctors and Clinicians fileNo · 51% of these records are
- Record last updated2009 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208100000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Physical Medicine & Rehabilitation Physician providers in California
There are 1,549 physical medicine & rehabilitation physician records in California.
All 1,549 in California → Every provider in Redwood City → Physical Medicine & Rehabilitation Physician nationwide →
The 8 physical medicine & rehabilitation physician records with the nearest ZIP codes
- Christopher Bonzon, M.D.Redwood City, CA 940631215197199
- Elaine Date, M.D.Redwood City, CA 940631023107364
- Grace Firtch, MDRedwood City, CA 940631518045103
- Srinivas Ganesh, MDRedwood City, CA 940631437237021
- Claudia Haeussler, DPTRedwood City, CA 940631376213876
- Elizabeth Heilman, MDRedwood City, CA 940631992879217
- Raymond Lai, DORedwood City, CA 940631194803635
- Katharine Lai, DORedwood City, CA 940631144394743
Common questions
What is Mark Jordan Sontag, MD's NPI number?
Mark Jordan Sontag, MD's National Provider Identifier (NPI) is 1891854568, issued on Dec 8, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark Jordan Sontag, MD located?
The NPPES record lists a practice address at 363 Main St, Redwood City, CA, 94063. Phone: (650) 306-9490. Providers update this record themselves, so call before visiting.
How can I verify Mark Jordan Sontag, MD's license?
NPPES lists California license number G052976, 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 Mark Jordan Sontag, MD prescribe under Medicare Part D?
In 2024, Mark Jordan Sontag, MD had 27 Medicare Part D claims; the average among physical medicine & rehabilitation physician prescribers was 727. 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.