NPPES file of Aug 9, 2026

Siddika E. Karakas, M.D.

Endocrinology, Diabetes & Metabolism Physician · Sacramento, CA

Siddika E. Karakas, M.D. is an endocrinology, diabetes & metabolism physician with a practice address in Sacramento, California, and NPI 1386629970, issued on Dec 7, 2005. Check the license (California A33466, 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 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1386629970
Name
Siddika E. Karakas
Credential
M.D.
Primary taxonomy
Endocrinology, Diabetes & Metabolism Physician 207RE0101X
License number
A33466 CA
Self-reported in NPPES; status is on the state search
Practice location
4150 V Street, Suite G400, Sacramento, CA 95817
Phone
(916) 734-3730
Enumerated
Dec 7, 2005
Record last updated
Apr 30, 2015 (not updated in 11 years: call before relying on the address or phone)
Fax
(916) 734-7953
Medicare enrollment
Enrolled (PECOS I20080729000700); accepts Medicare assignment
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 endocrinology, diabetes & metabolism physician records → All 1,131 in California → Look up another NPI →

Also registered at 4150 V Street, Suite G400

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

  1. Kent Ishihara, M.D.Endocrinology, Diabetes & Metabolism Physician1679658280

Verify Siddika E. Karakas in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A33466    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

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Bills Medicare through one group practice

  1. Regents OF The Univ OF CASacramento, CA

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

Siddika E. Karakas among 1,131 endocrinology, diabetes & metabolism physician records in California

Siddika E. Karakas, M.D. is one of 1,131 endocrinology, diabetes & metabolism physician records with a practice address in California. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.

  • NPI issued2005 · 0% of these records are older, 95% newer
  • In a Medicare fileYes · 84% of these records are
  • In the CMS Doctors and Clinicians fileYes · 69% of these records are
  • Graduated1973 · median 2003 among the 779 with a school on file
  • Record last updated2015 · 57% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Endocrinology, Diabetes & Metabolism Physician providers in California

There are 1,131 endocrinology, diabetes & metabolism physician records in California.

All 1,131 in California → Every provider in Sacramento → Endocrinology, Diabetes & Metabolism Physician nationwide →

The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes

  1. Thomas Aoki, MDSacramento, CA 958171730151655
  2. Lars Berglund, MD PHDSacramento, CA 958171417929696
  3. Aili Guo, MDSacramento, CA 958171598822645
  4. Kent Ishihara, M.D.Sacramento, CA 958171679658280
  5. Erin McCorry, M.D.Sacramento, CA 958171134495146
  6. James McMonagle, MDSacramento, CA 958171528174901
  7. Mark Moriwaki, M.D.Sacramento, CA 958171295716090
  8. Pamela Prescott, MDSacramento, CA 958171205808334

Common questions

What is Siddika E. Karakas, M.D.'s NPI number?

Siddika E. Karakas, M.D.'s National Provider Identifier (NPI) is 1386629970, issued on Dec 7, 2005. An NPI identifies a provider in billing; it is not a license.

Where is Siddika E. Karakas, M.D. located?

The NPPES record lists a practice address at 4150 V Street, Suite G400, Sacramento, CA, 95817. Phone: (916) 734-3730. Providers update this record themselves, so call before visiting.

How can I verify Siddika E. Karakas, M.D.'s license?

NPPES lists California license number A33466, 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. 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.