NPPES file of Aug 9, 2026

Daniel Jon Kostalnick, M.D.

Psychiatry Physician · Pleasanton, CA

Daniel Jon Kostalnick, M.D. is a psychiatry physician with a practice address in Pleasanton, California, and NPI 1821007295, issued on Aug 5, 2006. Check the license (California A77386, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1821007295
Name
Daniel Jon Kostalnick
Credential
M.D.
Primary taxonomy
Psychiatry Physician 2084P0800X
License number
A77386 CA
Self-reported in NPPES; status is on the state search
Practice location
2324 Santa Rita RD, Pleasanton, CA 94566
Phone
(925) 784-4000
Enumerated
Aug 5, 2006
Record last updated
Jun 8, 2016 (not updated in 10 years: call before relying on the address or phone)
Fax
(925) 426-0085
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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Also registered at 2324 Santa Rita RD

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

  1. Todd Auker, M.D.Specialist1891795712
  2. Michele Chalmers, DDSDentist1336207984
  3. Elmer Jumig, MDPediatrics Physician1417926437
  4. Marc Klein, PH.D.Marriage & Family Therapist1710108477
  5. Stan Lin, M.D.Neurology Physician1538374368
  6. Zohreh MarashiGeneral Practice Dentistry1891281242

Verify Daniel Jon Kostalnick in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A77386    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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31% more Medicare Part D claims than the average psychiatry physician in 2024

1,308 Medicare Part D claims for 94 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 2% of claims.

  1. Daniel Kostalnick1,308
  2. Specialty average1,000

Most prescribed

  1. Duloxetine Hcl165 claims
  2. Bupropion Xl163 claims
  3. Alprazolam71 claims
  4. Venlafaxine Hcl Er71 claims
  5. Lorazepam67 claims
  6. Sertraline Hcl67 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.

Psychiatry Physician providers in California

There are 8,673 psychiatry physician records in California.

All 8,673 in California → Every provider in Pleasanton →

Other psychiatry physician records in California

  1. Nancy Aaen, MDNapa, CA1609816669
  2. Criselda Abad-Santos, M.D.Woodland Hills, CA1760461826
  3. Mekabiz Abaian, MDSan Bernardino, CA1891090163
  4. Brenda Abarca, MDTorrance, CA1407485527
  5. Pilar Abascal, M.D.Los Angeles, CA1730528191
  6. Michele Abbasi, M.D.Westlake Village, CA1093940330
  7. Zohaib AbbasiMartinez, CA1013392224
  8. Sandy Abdelkedous, MDFresno, CA1306093109
  9. Nancy Abdelmalak, M.D.Elk Grove, CA1912137498
  10. Ezzat Abdelmalek, M.DDana Point, CA1992828826

Common questions

What is Daniel Jon Kostalnick, M.D.'s NPI number?

Daniel Jon Kostalnick, M.D.'s National Provider Identifier (NPI) is 1821007295, issued on Aug 5, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Daniel Jon Kostalnick, M.D. located?

The NPPES record lists a practice address at 2324 Santa Rita RD, Pleasanton, CA, 94566. Phone: (925) 784-4000. Providers update this record themselves, so call before visiting.

How can I verify Daniel Jon Kostalnick, M.D.'s license?

NPPES lists California license number A77386, 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 Daniel Jon Kostalnick, M.D. prescribe under Medicare Part D?

In 2024, Daniel Jon Kostalnick, M.D. had 1,308 Medicare Part D claims for 94 beneficiaries; the average among psychiatry physician prescribers was 1,000. 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.

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.