Paul Gregerson, M.D.
Internal Medicine Physician · Los Angeles, CA
Paul Gregerson, M.D. is an internal medicine physician with a practice address in Los Angeles, California, and NPI 1417022336, issued on Nov 24, 2006. Check the license (California G55695, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Paul Gregerson
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- G55695 CA
Self-reported in NPPES; status is on the state search - Practice location
- 522 S San Pedro St, Los Angeles, CA 90013
- Phone
- (213) 486-4929
- Enumerated
- Nov 24, 2006
- Record last updated
- Oct 20, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (213) 627-4043
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 522 S San Pedro St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Paul Gregerson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G55695Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
94% fewer Medicare Part D claims than the average internal medicine physician in 2024
200 Medicare Part D claims for 33 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims.
Most prescribed
- Gabapentin20 claims
- Albuterol Sulfate Hfa14 claims
- Atorvastatin Calcium14 claims
- Ibuprofen13 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.
Paul Gregerson among 17,696 internal medicine physician records in California
Paul Gregerson, M.D. is one of 17,696 internal medicine physician records with a practice address in California. 79% 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 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2016 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1,423 internal medicine physician records list a practice address in Los Angeles
They are 1,423 of the 69,537 NPPES records with a practice address in Los Angeles, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Los Angeles → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
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- Kimberly Chan, M.DLos Angeles, CA 900121295166692
- Man-Chun Chen, M.D.Los Angeles, CA 900121780909838
- Joon Choung, MDLos Angeles, CA 900121487999264
- Sulma Herrera, MD, MPHLos Angeles, CA 900121174944623
- Nicholas Hutchings, MDLos Angeles, CA 900121710482690
Common questions
What is Paul Gregerson, M.D.'s NPI number?
Paul Gregerson, M.D.'s National Provider Identifier (NPI) is 1417022336, issued on Nov 24, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Paul Gregerson, M.D. located?
The NPPES record lists a practice address at 522 S San Pedro St, Los Angeles, CA, 90013. Phone: (213) 486-4929. Providers update this record themselves, so call before visiting.
How can I verify Paul Gregerson, M.D.'s license?
NPPES lists California license number G55695, 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 Paul Gregerson, M.D. prescribe under Medicare Part D?
In 2024, Paul Gregerson, M.D. had 200 Medicare Part D claims for 33 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.
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.