Attorney RecordLitigation · Los Angeles County
Gregory N. Pimstone · Litigation Attorney
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Gregory N. Pimstone is on California’s State Bar roll, #150203, admitted in 1990; license status: active as of 22 July 2026. The address of record is in Los Angeles, Los Angeles County. Practice areas listed in the registry: Health Care Law and Litigation. This profile lists one third-party recognition, in Chambers USA 2026, as published by Chambers and Partners. Registry record updated 8 October 2026; license information comes from the State Bar.
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Verified against official State Bar of California records · record last updated 8 October 2026. Contact information on this page comes from the public record and is shown free, the registry never paywalls it.
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The record
| State Bar number | #150203 |
|---|---|
| License status | Active |
| Admitted | 1990 |
| Law school | Univ of California Berkeley |
| Firm | Manatt Phelps et al LLP |
| Location | Los Angeles, Los Angeles County |
| Registry identity | Official State Bar record |
Practice areas
Practice areas are self-reported to the State Bar or added by the attorney; listing one is not a State Bar certification.
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Cases of record
From published opinions naming this attorney as counsel. The attorney has not yet confirmed these records.
| Case | Appeared for | Citation | Court | Decided |
|---|---|---|---|---|
| Northbay Healthcare Grp. - Hosp. Div. v. Blue Shield of Cal. Life & Health Ins. | Counsel for the defendant | 342 F. Supp. 3d 980 | U.S. District Court, Northern District of California | 26 October 2018 |
| Northbay Healthcare Grp., Inc. v. Kaiser Found. Health Plan, Inc. | Counsel for the defendant | 305 F. Supp. 3d 1065 | U.S. District Court, Northern District of California | 30 March 2018 |
| Kaiser Found. Health Plan, Inc. v. Superior Court of L. A. Cnty. | Counsel for the petitioner | 13 Cal. App. 5th 1125 | California Court of Appeal | 31 July 2017 |
| Des Roches v. California Physicians' Service | Counsel for the defendant | 320 F.R.D. 486 | U.S. District Court, Northern District of California | 15 June 2017 |
| Centinela Freeman Emergency Medical Associates v. Health Net of California, Inc. | Counsel for the respondent | 1 Cal. 5th 994 | California Supreme Court | 14 November 2016 |
| Kaiser Foundation Health Plan, Inc. v. Burwell | Counsel for the plaintiff | 147 F. Supp. 3d 897 | U.S. District Court, Northern District of California | 30 November 2015 |
| Myers v. Board of Equalization | Counsel for the respondent | 240 Cal. App. 4th 722 | California Court of Appeal | 25 September 2015 |
| Escalante v. California Physicians' Service | Counsel for the defendant | 309 F.R.D. 612 | U.S. District Court, Central District of California | 14 July 2015 |
| Rea v. Blue Shield of California | Counsel for the respondent | 226 Cal. App. 4th 1209 | California Court of Appeal | 10 June 2014 |
| Blue Shield of California Life & Health Insurance v. Superior Court | Counsel for the petitioner | 192 Cal. App. 4th 727 | California Court of Appeal | 9 February 2011 |
| Nazaretyan v. California Physicians' Service | Counsel for the respondent | 182 Cal. App. 4th 1601 | California Court of Appeal | 23 March 2010 |
| Hagan v. California Physicians' Service | Counsel for the defendant | 685 F. Supp. 2d 1044 | U.S. District Court, Northern District of California | 4 February 2010 |
| Nieto v. Blue Shield of California Life & Health Insurance | Counsel for the respondent | 181 Cal. App. 4th 60 | California Court of Appeal | 19 January 2010 |
| Blue Cross of California, Inc. v. Superior Court | Counsel for the petitioner | 180 Cal. App. 4th 1237 | California Court of Appeal | 12 January 2010 |
| Watanabe v. California Physicians' Service | Counsel for the respondent | 169 Cal. App. 4th 56 | California Court of Appeal | 18 November 2008 |
| Ticconi v. Blue Shield of California Life & Health Insurance | Counsel for the respondent | 160 Cal. App. 4th 528 | California Court of Appeal | 27 February 2008 |
| Cleghorn v. Blue Shield of California | Counsel for the respondent | 408 F.3d 1222 | U.S. Court of Appeals for the Ninth Circuit | 23 May 2005 |
| Tosco Corp. v. Communities for a Better Environment | Counsel for the appellant | 236 F.3d 495 | U.S. Court of Appeals for the Ninth Circuit | 2 January 2001 |
| Tosco Corp. v. Communities for a Better Environment | Counsel for the appellant | 2001 Cal. Daily Op. Serv. 49 | California Supreme Court | 2 January 2001 |
| Unocal Corp. v. Kaabipour | Counsel for the respondent | 177 F.3d 755 | U.S. Court of Appeals for the Ninth Circuit | 18 May 1999 |
| Tosco Corp. v. Communities for a Better Environment | Counsel for the plaintiff | 41 F. Supp. 2d 1061 | U.S. District Court, Central District of California | 1 February 1999 |
Appearances in published opinions, drawn from public court records. Cases of record are matters of public record and are not a representation of results; past results do not guarantee a similar outcome. Legal information, not legal advice.
Each case name opens the published opinion it comes from. Is a case not this attorney’s? The attorney can claim this profile and mark it as not theirs, which removes it from this page; anyone can report an error through Help & Support.
Third-party recognitions
Third-party recognitions, as published by their issuers. CAR does not rank attorneys. How to read a Chambers recognition.
Chambers USA 2026, Band 1, Healthcare (California). As published by Chambers and Partners; CAR does not rank attorneys. Firm at the time: Husch Blackwell LLP.
Published source · Methodology
Published by Chambers and Partners and shown under licence. Not yet confirmed by the attorney. Last checked 3 October 2026.
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Issuers set their own criteria and may sell marketing products to the firms they recognize. A recognition is not a guarantee of any result. The California Attorney Registry is not affiliated with Chambers and Partners.
On the official record
The employer on the official record is Manatt Phelps et al LLP.
A firm or employer website answers at manatt.com, the domain of the email address on the State Bar record.
The law school on the record is UC Berkeley School of Law.
Admitted to the California Bar in 1990 · 36 years on the roll.
Practice areas on the record: Health Care Law and Litigation.
21 appearances as counsel in published opinions are on this record.
The address of record is in Los Angeles, in Los Angeles County, where matters are ordinarily heard at the Superior Court of California, County of Los Angeles, seated at Los Angeles.
Confirm Gregory N. Pimstone’s license status, bar number #150203, and official disciplinary or administrative history directly with the State Bar of California at apps.calbar.ca.gov before retaining counsel. This profile does not reproduce the complete official history; missing information does not mean no discipline. This page indexes public-record data and identifies verified claims; it does not rate attorney quality or predict results.
Legal information, not legal advice.
On the record nearby
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