Mark Koransky, MD
Surgery Physician · Fremont, CA
Mark Koransky, MD is a surgery physician with a practice address in Fremont, California, and NPI 1750472338, issued on Sep 27, 2006. Check the license (California A63039, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mark Koransky
- Credential
- MD
- Primary taxonomy
- Surgery Physician 208600000X
- License number
- A63039 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3200 Kearney St, Fremont, CA 94538
- Phone
- (510) 490-1222
- Enumerated
- Sep 27, 2006
- Record last updated
- May 20, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20041119000547); accepts Medicare assignment
- Medical or professional school
- University Of California, San Francisco School Of Medicine, 1996
- Entity
- Type 1 · individual
8 nearest surgery physician records → All 3,118 in California → Look up another NPI →
Also registered at 3200 Kearney St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Jessica Aldaz, FNPFamily Nurse Practitioner1740467174
- Neha AnandFamily Medicine Physician1477810836
- Lauren Auerbach, MDEmergency Medicine Physician1033678990
- Ritika Aulakh, D.OFamily Medicine Physician1346335072
- Rupal Badani, M.D.Pediatrics Physician1598857765
Verify Mark Koransky in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A63039Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
55% fewer Medicare Part D claims than the average surgery physician in 2024
66 Medicare Part D claims for 56 beneficiaries, against an average of 147 among the 20,115 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims. 59 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen36 claims
- Tramadol Hcl22 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: $358.96
2 payments; by number, the most common kind was travel and lodging; the largest payer was Intuitive Surgical, Inc. The 17,103 providers of this specialty with any payment received $3,513.80 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
- Sutter Bay Medical FoundationFremont, CA
- Washington Township Medical FoundationFremont, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark Koransky among 3,118 surgery physician records in California
Mark Koransky, MD is one of 3,118 surgery physician records with a practice address in California. 75% 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 6% of them.
- NPI issued2006 · 6% of these records are older, 55% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 61% of these records are
- Graduated1996 · median 2003 among the 1,901 with a school on file
- Record last updated2020 · 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 208600000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Surgery Physician providers in California
There are 3,118 surgery physician records in California.
All 3,118 in California → Every provider in Fremont → Surgery Physician nationwide →
The 8 surgery physician records with the nearest ZIP codes
- Kranthi Achanta, M.DFremont, CA 945381114927241
- Ramsey Araj, MDFremont, CA 945381871513663
- William Brown, M.D.Fremont, CA 945381457394926
- Christine Chu, MDFremont, CA 945381992880660
- Lawrence Dennen, MDFremont, CA 945381710062476
- William Dugoni, MDFremont, CA 945381427071075
- Sanjoy Dutta, MDFremont, CA 945381841375508
- Hanlon Jen, MDFremont, CA 945381891870556
Common questions
What is Mark Koransky, MD's NPI number?
Mark Koransky, MD's National Provider Identifier (NPI) is 1750472338, issued on Sep 27, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark Koransky, MD located?
The NPPES record lists a practice address at 3200 Kearney St, Fremont, CA, 94538. Phone: (510) 490-1222. Providers update this record themselves, so call before visiting.
How can I verify Mark Koransky, MD's license?
NPPES lists California license number A63039, 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 Koransky, MD prescribe under Medicare Part D?
In 2024, Mark Koransky, MD had 66 Medicare Part D claims for 56 beneficiaries; the average among surgery physician prescribers was 147. 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.