NPPES file of Aug 9, 2026

Michael S. Stock, M.D.

Orthopaedic Surgery Physician · Larkspur, CA

Michael S. Stock, M.D. is an orthopaedic surgery physician with a practice address in Larkspur, California, and NPI 1235176306, issued on May 31, 2006. Check the license (California G14014, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1235176306
Name
Michael S. Stock
Credential
M.D.
Primary taxonomy
Orthopaedic Surgery Physician 207X00000X
License number
G14014 CA
Self-reported in NPPES; status is on the state search
Practice location
18 Bon Air RD, Larkspur, CA 94939
Phone
(415) 927-5300
Enumerated
May 31, 2006
Record last updated
Sep 21, 2009 (not updated in 17 years: call before relying on the address or phone)
Fax
(415) 927-6860
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest orthopaedic surgery physician records → All 2,276 in California → Look up another NPI →

Also registered at 18 Bon Air RD

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Quianna Ashley-White, PAPhysician Assistant1396466876
  2. Jamie Cunha, PT, DPTPhysical Therapist1407046667
  3. Natali Feyzbakhsh, PASurgical Physician Assistant1801516380
  4. Jonathan Goff, MDOrthopaedic Surgery Physician1689629388
  5. David Goltz, M.D.Sports Medicine (Orthopaedic Surgery) Physician1104879014
  6. John Keohane, M.D.Orthopaedic Surgery Physician1134173677

Verify Michael S. Stock in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license G14014    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

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Michael S. Stock among 2,276 orthopaedic surgery physician records in California

Michael S. Stock, M.D. is one of 2,276 orthopaedic surgery physician records with a practice address in California. 74% 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 10% of them.

  • NPI issued2006 · 10% of these records are older, 46% newer
  • In a Medicare fileNo · 74% of these records are
  • In the CMS Doctors and Clinicians fileNo · 59% of these records are
  • Record last updated2009 · 66% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207X00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

8 orthopaedic surgery physician records list a practice address in Larkspur

They are 8 of the 291 NPPES records with a practice address in Larkspur, and 2,276 orthopaedic surgery physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 2,276 in California → Every provider in Larkspur → Orthopaedic Surgery Physician nationwide →

The 8 orthopaedic surgery physician records with the nearest ZIP codes

  1. Jonathan Goff, MDLarkspur, CA 949391689629388
  2. John Keohane, M.D.Larkspur, CA 949391134173677
  3. Irina Melnik, M.D.Larkspur, CA 949391902859838
  4. Michael Oechsel, M.D.Larkspur, CA 949391235186206
  5. Alex Prescott, MDLarkspur, CA 949391427132596
  6. Akash Shah, MDLarkspur, CA 949391932605094
  7. Charles Stuart, M.D.Larkspur, CA 949391942257910
  8. Marilee Jasan, MDMill Valley, CA 949411093894016

Common questions

What is Michael S. Stock, M.D.'s NPI number?

Michael S. Stock, M.D.'s National Provider Identifier (NPI) is 1235176306, issued on May 31, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Michael S. Stock, M.D. located?

The NPPES record lists a practice address at 18 Bon Air RD, Larkspur, CA, 94939. Phone: (415) 927-5300. Providers update this record themselves, so call before visiting.

How can I verify Michael S. Stock, M.D.'s license?

NPPES lists California license number G14014, 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.