NPPES file of Aug 9, 2026

James Santiago Grisolia, M.D.INC

Neurology Physician · San Diego, CA

James Santiago Grisolia, M.D.INC is a neurology physician with a practice address in San Diego, California, and NPI 1336102359, issued on Apr 10, 2006. Check the license (California G42884, 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
1336102359
Name
James Santiago Grisolia
Credential
M.D.INC
Primary taxonomy
Neurology Physician 2084N0400X
License number
G42884 CA
Self-reported in NPPES; status is on the state search
Practice location
4033 3RD Ave Ste 204, San Diego, CA 92103
Phone
(619) 297-1155
Enumerated
Apr 10, 2006
Record last updated
Mar 26, 2025
Medicaid ID
00G428840 CA
Medicare enrollment
Enrolled (PECOS I20101021000638); accepts Medicare assignment
Medical or professional school
University Of California, San Diego School Of Medicine, 1979
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest neurology physician records → All 2,339 in California → Look up another NPI →

Also registered at 4033 3RD Ave Ste 204

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

  1. Bret Langenberg, DO, FACSSurgery Physician1720014038

Verify James Santiago Grisolia in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license G42884    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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2.7 times the Medicare Part D claims of the average neurology physician in 2024

3,637 Medicare Part D claims for 568 beneficiaries, against an average of 1,370 among the 15,005 providers of this specialty who prescribed in Part D. Brand-name drugs were 5% of claims.

  1. James Grisolia3,637
  2. Specialty average1,370

Most prescribed

  1. Memantine Hcl542 claims
  2. Quetiapine Fumarate210 claims
  3. Donepezil Hcl209 claims
  4. Topiramate170 claims
  5. Duloxetine Hcl168 claims
  6. Carbidopa-Levodopa157 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: $1,614.07

58 payments; by number, the most common kind was food and beverage; the largest payer was Ucb, Inc. The 10,858 providers of this specialty with any payment received $8,318.07 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. James Grisolia$1,614.07
  2. Specialty average$8,318.07

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Bills Medicare through one group practice

  1. ON Call Specialists Medical Group OF San Diego IncChula Vista, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

James Santiago Grisolia among 2,339 neurology physician records in California

James Santiago Grisolia, M.D.INC is one of 2,339 neurology physician records with a practice address in California. 81% 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 4% of them.

  • NPI issued2006 · 4% of these records are older, 59% newer
  • In a Medicare fileYes · 81% of these records are
  • In the CMS Doctors and Clinicians fileYes · 70% of these records are
  • Graduated1979 · median 2006 among the 1,628 with a school on file
  • Record last updated2025 · 55% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084N0400X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Neurology Physician providers in California

There are 2,339 neurology physician records in California.

All 2,339 in California → Every provider in San Diego → Neurology Physician nationwide →

The 8 neurology physician records with the nearest ZIP codes

  1. John Aalbers, M.D.San Diego, CA 921031942262431
  2. James Brewer, M.D./PH.DSan Diego, CA 921031033144985
  3. Kristi Dove, MDSan Diego, CA 921031598730335
  4. Ronald Ellis, M.D., PH.D.San Diego, CA 921031992763114
  5. George Ellison, M.DSan Diego, CA 921031194740365
  6. Charles Jablecki, M.D.San Diego, CA 921031255315677
  7. Mark Kritchevsky, MDSan Diego, CA 921031104866318
  8. Stephanie Lessig, M.D.San Diego, CA 921031134167141

Common questions

What is James Santiago Grisolia, M.D.INC's NPI number?

James Santiago Grisolia, M.D.INC's National Provider Identifier (NPI) is 1336102359, issued on Apr 10, 2006. An NPI identifies a provider in billing; it is not a license.

Where is James Santiago Grisolia, M.D.INC located?

The NPPES record lists a practice address at 4033 3RD Ave Ste 204, San Diego, CA, 92103. Phone: (619) 297-1155. Providers update this record themselves, so call before visiting.

How can I verify James Santiago Grisolia, M.D.INC's license?

NPPES lists California license number G42884, 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 James Santiago Grisolia, M.D.INC prescribe under Medicare Part D?

In 2024, James Santiago Grisolia, M.D.INC had 3,637 Medicare Part D claims for 568 beneficiaries; the average among neurology physician prescribers was 1,370. 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.