Mark Isaacson
Anesthesiology Physician · Monterey, CA
Mark Isaacson is an anesthesiology physician with a practice address in Monterey, California, and NPI 1396715793, issued on Jan 26, 2006. Check the license (California G58617, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Mark Isaacson
- Primary taxonomy
- Anesthesiology Physician 207L00000X
- License number
- G58617 CA
Self-reported in NPPES; status is on the state search - Practice location
- 966 Cass Street, Monterey, CA 93940
- Phone
- (831) 649-1126
- Enumerated
- Jan 26, 2006
- Record last updated
- Mar 12, 2014 (not updated in 12 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20051103000905); accepts Medicare assignment
- Medical or professional school
- University Of Utah School Of Medicine, 1986
- Entity
- Type 1 · individual
8 nearest anesthesiology physician records → All 7,571 in California → Look up another NPI →
Also registered at 966 Cass Street
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Mark Isaacson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G58617Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Mark Isaacson among 7,571 anesthesiology physician records in California
Mark Isaacson is one of 7,571 anesthesiology physician records with a practice address in California. 71% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 53% newer
- In a Medicare fileNo · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated1986 · median 2006 among the 4,868 with a school on file
- Record last updated2014 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207L00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
33 anesthesiology physician records list a practice address in Monterey
They are 33 of the 1,945 NPPES records with a practice address in Monterey, and 7,571 anesthesiology physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 7,571 in California → Every provider in Monterey → Anesthesiology Physician nationwide →
The 8 anesthesiology physician records with the nearest ZIP codes
- Heinrich Brinks, MDMonterey, CA 939401831135722
- Alexander Dubelman, MDMonterey, CA 939401699796557
- Bruce Hultgren, MDMonterey, CA 939401285734988
- Richard Kelly, MDMonterey, CA 939401346205663
- Robert Keszler, M.D.Monterey, CA 939401417962366
- Nicol Mackenzie, MDMonterey, CA 939401205857174
- Ue Ow, M.D.Monterey, CA 939401033106257
- Richard Revis, M.D.Monterey, CA 939401902914484
Common questions
What is Mark Isaacson's NPI number?
Mark Isaacson's National Provider Identifier (NPI) is 1396715793, issued on Jan 26, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark Isaacson located?
The NPPES record lists a practice address at 966 Cass Street, Monterey, CA, 93940. Phone: (831) 649-1126. Providers update this record themselves, so call before visiting.
How can I verify Mark Isaacson's license?
NPPES lists California license number G58617, 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. 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.