NPPES file of Aug 9, 2026

Curtis I. Johnson, M.D.

Internal Medicine Physician · Emeryville, CA

Curtis I. Johnson, M.D. is an internal medicine physician with a practice address in Emeryville, California, and NPI 1336118421, issued on Mar 14, 2006. Check the license (California A86421, 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
1336118421
Name
Curtis I. Johnson
Credential
M.D.
Primary taxonomy
Internal Medicine Physician 207R00000X
License number
A86421 CA
Self-reported in NPPES; status is on the state search
Practice location
1250 45TH St, Emeryville, CA 94608
Phone
(510) 596-8988
Enumerated
Mar 14, 2006
Record last updated
Jul 13, 2026
Fax
(510) 596-8956
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 internal medicine physician records → All 17,696 in California → Look up another NPI →

Also registered at 1250 45TH St

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

  1. Jose Camaro, M.D.Internal Medicine Physician1679532808
  2. Joshua Gitter, M.D.Internal Medicine Physician1255418505
  3. Kou-Ying Hsieh, M.D.Internal Medicine Physician1447208731
  4. Daniel Perlov, M.D.Anesthesiology Physician1700855798
  5. Brian Roberts, M.D.Internal Medicine Physician1831158120
  6. John Russell, M.D.Internal Medicine Physician1689634958

Verify Curtis I. Johnson in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A86421    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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Curtis I. Johnson among 17,696 internal medicine physician records in California

Curtis I. Johnson, 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 not. Its NPI, issued in 2006, is newer than 5% of them.

  • NPI issued2006 · 5% of these records are older, 56% newer
  • In a Medicare fileNo · 79% of these records are
  • In the CMS Doctors and Clinicians fileNo · 63% of these records are
  • Record last updated2026 · 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).

24 internal medicine physician records list a practice address in Emeryville

They are 24 of the 703 NPPES records with a practice address in Emeryville, and 17,696 internal medicine physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 17,696 in California → Every provider in Emeryville → Internal Medicine Physician nationwide →

The 8 internal medicine physician records with the nearest ZIP codes

  1. Clay Angel, M.D.Emeryville, CA 946081477522548
  2. Nelson Bunin, MDEmeryville, CA 946081508812363
  3. Jose Camaro, M.D.Emeryville, CA 946081679532808
  4. Janet Ewing, MDEmeryville, CA 946081316987027
  5. Kou-Ying Hsieh, M.D.Emeryville, CA 946081447208731
  6. Dean Nickles, MDEmeryville, CA 946081255390050
  7. Brian Roberts, M.D.Emeryville, CA 946081831158120
  8. John Russell, M.D.Emeryville, CA 946081689634958

Common questions

What is Curtis I. Johnson, M.D.'s NPI number?

Curtis I. Johnson, M.D.'s National Provider Identifier (NPI) is 1336118421, issued on Mar 14, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Curtis I. Johnson, M.D. located?

The NPPES record lists a practice address at 1250 45TH St, Emeryville, CA, 94608. Phone: (510) 596-8988. Providers update this record themselves, so call before visiting.

How can I verify Curtis I. Johnson, M.D.'s license?

NPPES lists California license number A86421, 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.